How to get a better HERS ratingReally it is about how to build a

better house

Chet PashoNovember 3, 2010

www.preferredbuildings.com

Major components of a HERS rating

• Air sealing• Insulation levels• Thermal bridging• Ventilation • Equipment choices – heating, cooling, • Lighting• Appliances

Before you start digging

Enroll your new home in the ENERGY STAR program .

Get a plan review.Develop strategies to improve the performance

of your new home.

Start at the foundation

• Proper drainage and backfill• Radon collection• Insulate the foundation walls• Insulate the slab• Air seal the foundation• Air seal the sill

Air sealing – how important is it really?

• Heat loss• Moisture transfer

Floor to wall connections

Air sealing walls

• Air tight drywall

Attic air sealing..

• Access panels• Pipes• Wires• Partitions• Chimneys• ducts

Attic air sealing-why is it important?

“Filtered air”

Pipes and wires

Insulation- what kind?

• Fiberglass• Cellulose• Spray foams• Sheet foams• Hay bales

Insulation – how much?

Windows and doors

• U values• SHGC values• Infiltration rates

Thermal bridging???

OVE framing

Insulated sheathings

Why ventilate?

• Moisture control• Odors• VOC’s• Radon

How much to ventilate?

What equipment to use?

• Exhaust only• Balanced ventilation• HRV/ERV

No silver bullet

• Attention to small details• Educate your customers• Educate subs• Educate your crew• Create ownership and enthusiasm• Throw a party• Market the energy efficiency of your homes