balanced heat and energy recovery ventilation · pdf fileany method or manner of handling, ......
TRANSCRIPT
![Page 1: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/1.jpg)
1
Balanced Ventilation:Heat and Energy Recovery
Michael LeBeau | Conservation Technologies | Duluth, MN
Efficient Fresh Air forLow Energy Buildings
Better Buildings By Design
Conference 2010
Burlington, Vermont February 11, 2010
![Page 2: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/2.jpg)
•Efficiency Vermont is a Registered Provider with The American Institute of Architects Continuing Education Systems. Creditearned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
Better Buildings By Design 2010
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
![Page 3: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/3.jpg)
Learning Objectives
• At the end of this program, participants will be able to:– Discover why and when to choose heat or
energy recovery ventilation.– Identify how these technologies fit into a
systems approach to building. – Understand latest advances in technology and
resulting equipment-availability. – Implement balancing and verification
strategies.
![Page 4: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/4.jpg)
4
![Page 5: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/5.jpg)
5
![Page 6: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/6.jpg)
6
Different kind of air
• Ventilation
• Combustion
• Makeup
![Page 7: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/7.jpg)
7
Ventilation Services
• The removal of polluted air from a building and its replacement with fresh outdoor air.
– Pollutant / moisture source focused exhaust best.
– Distribution of fresh air into all habitable rooms.
– Controlled airflow based on need.
![Page 8: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/8.jpg)
8
![Page 9: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/9.jpg)
9
An Integrated Approach to Building Systems
• Tight buildings for ventilation control• Quiet efficient mechanical ventilation• Safe combustion appliances• Whole building pressure management• Planned fresh air paths
![Page 10: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/10.jpg)
10
![Page 11: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/11.jpg)
11
The Different Roles of Mechanical Ventilation
• Indoor relative humidity management.• Internally generated pollutant control.• Delivery of fresh, outside air to living
spaces.• To accomplish the above quietly and
efficiently.
![Page 12: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/12.jpg)
12
Types of ventilation systems
• Exhaust driven– Removing air from a building using fan power.– Usually not planning the replacement air path.
• Supply driven– Bringing outside air into a building with fans.– Letting it find it’s way out or providing a way.
• Balanced– Powered airflow both in and out at roughly the
same rate.
![Page 13: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/13.jpg)
13
All ventilation is balanced
![Page 14: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/14.jpg)
14
![Page 15: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/15.jpg)
15
![Page 16: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/16.jpg)
16
![Page 17: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/17.jpg)
17
![Page 18: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/18.jpg)
18
![Page 19: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/19.jpg)
19
Mechanically Balanced Options
• Some combination of exhaust and supply options.
• HRV / ERV• Most effective as we succeed in our efforts
to build more airtight buildings.• Heat / energy recovery increasingly cost
effective as energy costs continue to climb.
![Page 20: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/20.jpg)
20
Fully Ducted
![Page 21: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/21.jpg)
21
Ducted ExhaustFresh to Furnace
![Page 22: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/22.jpg)
22
HRV or ERV?
• ERV best for cooling dominated climates.• ERV often not recommended below 25F.?• Total energy recovery?• HRV needs drain.• HRV core more durable.
![Page 23: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/23.jpg)
23
Equipment Ratings
• Home Ventilating Institute• HVI.org• Certified Product Directory
– Section 1 - Home Ventilating Fans– Section 2 - Static Vents– Section 3 - HRV’s and ERV’s
![Page 24: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/24.jpg)
24
Design Considerations• Ventilation needs are carefully assessed.• Ventilation strategy chosen from options.• Physical space limitations of building.• Climate driven needs factored in.• Operating costs (electrical and added heating
/ cooling loads) evaluated.• Installation cost.• Accessibility for maintenance.• Future upgrade options and associated costs.
![Page 25: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/25.jpg)
25
Installation Priorities
• Design ventilation rate actually achieved.• Quiet and comfortable delivery of services.• Understandable and effective controls.• Effective exhaust and supply distribution.• Durable equipment, materials and methods
used.• Integration with other building systems.• Doesn’t compromise building envelope.
![Page 26: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/26.jpg)
26
Maintenance Provisions
• Simple and obvious accessibility.• Durable maintenance features.• End user documentation and orientation.• Maintenance service options offered.• Maintenance reminders are ideal.
![Page 27: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/27.jpg)
27
System Sizing and Design
• Start with .35 ACH continuous• Factor in site, # of occupants etc• Plan on higher rates for first year• Consider potential usage of building as well
as current• Separate kitchen range exhaust• Choose from existing equipment choices
![Page 28: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/28.jpg)
28
Installation Requirements• Space for HRV
– Proximity to exterior hoods• Access to fresh air• Minimize flex duct use
– Drain nearby– Minimum 60 degree room– Noise concerns– Power
![Page 29: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/29.jpg)
29
System Requirements (cont)
• Space for duct runs– Separate wall stack per room– Room for adequate branch and trunk lines and
fittings• Duct joints sealed for proper distribution• Ducts outside of envelope insulated to R8• Controls and wire runs
![Page 30: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/30.jpg)
30
Bath (-)
Bedroom (+)
Kitchen(-)
Living Room(+)
Master Suite (+)
Bath(-)
Closet
Closet
F
F
F
Fireplace F
EE
E
Fully Ducted Whole House Ventilation
(Building neutral relative to outside)
Clo
set
![Page 31: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/31.jpg)
31
![Page 32: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/32.jpg)
32
![Page 33: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/33.jpg)
33
Fully Ducted System
![Page 34: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/34.jpg)
34
High Efficiency HRV
![Page 35: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/35.jpg)
35
North American Advances
• ECM motors finally making an appearance.• Higher recovery efficiencies in ERV’s and
HRV’s
![Page 36: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/36.jpg)
36
88% Heat Recovery34 watts at 66 cfm95 watts at 150 cfm
![Page 37: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/37.jpg)
37
Defrost and equipment issues
• Using solar and internal gains to defrost or:• Using electrical energy to defrost.• Need to take a closer look at U.S. heat
recovery standards being discounted.
![Page 38: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/38.jpg)
38
The Physical Realities
• Space issues• Conflicts with other mechanical systems• Retro-fit options• Quality control• Available equipment options• Cost
![Page 39: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/39.jpg)
39
![Page 40: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/40.jpg)
40
![Page 41: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/41.jpg)
41
![Page 42: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/42.jpg)
42
7” Trunk and 6” Branch Lines
![Page 43: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/43.jpg)
43
6” oval wall stacks
![Page 44: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/44.jpg)
44
Stackhead box for round grille
![Page 45: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/45.jpg)
45
Exhaust duct extended in soffit
![Page 46: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/46.jpg)
46
Branch lines joining trunk in floor trusses
![Page 47: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/47.jpg)
47
Sealed joints and fittings
![Page 48: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/48.jpg)
48
Properly sized, smooth ducts
![Page 49: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/49.jpg)
49
Exterior hoods with adequate opening for minimum restriction
![Page 50: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/50.jpg)
50
![Page 51: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/51.jpg)
51
System Durability
• Ventilation fans need to be able to run continuously for years.
• Ducts, especially inaccessible ones, need to be durable, airtight and, ideally, cleanable.
• Filter housings should be able to take years of regular maintenance.
• Grilles should be cleanable.• Don’t sacrifice long term durability for short term
upfront cost savings.
![Page 52: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/52.jpg)
52
Maintenance
• Provide simple, understandable and obvious maintenance features.
• Educate end user or facility staff on maintenance needs, process and schedule.
• Offer maintenance services.• Automatic maintenance reminders are very
effective.
![Page 53: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/53.jpg)
53
Integration needs and opportunities
• Space needs – work with designers to dedicate space for equipment, ducts, exterior hoods and controls.
• Resolve structural and envelope penetrations created by system installation.
• Coordinate installation details with other trades – avoid conflicts and backtracking.
![Page 54: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/54.jpg)
54
Measure air flows and balance
• Air flows into and out of the house should be within 10% of balanced
• Excess fresh air flow will cause core frosting in cold weather
• Excess exhaust air flow will contribute to depressurization of house
• Measure air flows with dry, frost free core and clean filters
![Page 55: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/55.jpg)
![Page 56: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/56.jpg)
![Page 57: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/57.jpg)
57
Exhaust intakes will collect debris and need to be cleanable
![Page 58: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/58.jpg)
58
Fresh air spills out from behind this indirect lighting fixture
![Page 59: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/59.jpg)
59
An Example of a Central Ventilation Control
- Intermittent- Low speed - High speed- Dehumidistat- Maintenance
reminder
![Page 60: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/60.jpg)
60
High Speed Override Options
• Continuous low speed operation• Manual override at wall control• Touch pad switches (20/40/60 min.)• Crank timers• Dehumidistat
![Page 61: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/61.jpg)
61
High Speed Override Switch
![Page 62: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/62.jpg)
62
Make-up Air Modifications
• An HRV / ERV ducting can be tapped to provide make up air for exhaust devices.
• Diversion of exhaust air back indoors using motorized dampers and current sensors.
• Limited to airflow capacity of ventilator.• Takes advantage of residual heat in exhaust
air and existing blower and ducts.
![Page 63: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/63.jpg)
63
Maintenance RequirementsEvery 2-3 Months
• Clean filters • Check intake hood for blockage• Check control operation
![Page 64: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/64.jpg)
64
Maintenance RequirementsAnnually
• Clean core and interior • Inspect blower motors and defrost dampers• Flush condensate drain hose• Check blowers for caking• Clean exhaust grilles as needed• Maintenance contract
![Page 65: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/65.jpg)
65
Homeowner Orientation
• Proper use of controls• Cleaning
– Filters– Hoods– Ventilator
• Documentation and manuals• Contact numbers• Optional maintenance contract
![Page 66: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/66.jpg)
66
Fan Energy
• Fairly small electrical load but runs often or continuously.
• Significant aggregate savings possible with more efficient motors and strategies.
• ECM motors, smart controls and better duct design are main opportunities in North America.
• Natural and hybrid designs being developed elsewhere.
![Page 67: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/67.jpg)
67
Looking Ahead
• Consider future ventilation needs when designing ventilation for new buildings. Especially in difficult or expensive to upgrade components like ducts.
• Assume greatly increased energy costs in the near future when weighing options.
![Page 68: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/68.jpg)
68
Developments Elsewhere
• Natural and hybrid ventilation strategies growing in popularity in Europe and elsewhere.
• Very efficient fans being developed with smart controllers to assist natural stack and wind forces harnessed to provide ventilation.
• Integrated heat / energy recovery features to minimize energy penalties of ventilation.
![Page 69: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/69.jpg)
69
Norwegian hybrid vent research
![Page 70: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/70.jpg)
70
Natural ventilation w/ heat recovery near London (BedZed)
![Page 71: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/71.jpg)
71
![Page 72: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/72.jpg)
72
Passive House Applications
• Ventilation Heat Distribution• Integrated Solar Thermal• Earth Coupled Outside Air Tempering
![Page 73: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/73.jpg)
73
Solar Thermal w/ Gas Backup
![Page 74: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/74.jpg)
74
Fresh air tempering/ Post core heating
![Page 75: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/75.jpg)
75
![Page 76: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/76.jpg)
76
Water to air heat exchanger
![Page 77: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/77.jpg)
77
![Page 78: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/78.jpg)
78
Pex tubing buried in excavation
![Page 79: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/79.jpg)
79
![Page 80: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/80.jpg)
80
![Page 81: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/81.jpg)
81
![Page 82: Balanced Heat and Energy Recovery Ventilation · PDF fileany method or manner of handling, ... • Minimize flex duct use ... Balanced Heat and Energy Recovery Ventilation.ppt](https://reader031.vdocuments.net/reader031/viewer/2022011723/5a9de7d27f8b9a85318e23be/html5/thumbnails/82.jpg)
82
Make-up air via HRV Exhaust Diversion