passivhaus and part l low energy building

The Passivhaus Approachto Part L Compliance

Dec 2013Green Build Week

Aughey O'Flaherty Architects

Where

Does the Energy

Go?1

a tale of two standards

V

Detached house compliance

16 Air tight and vapour tight

Plans

DoHELG 2010 regulatory Impact Analysis

RIA Dwelling ID Proposed House Minimum Compliance

House type 2 storey Detached

Vent MHRV Hole in wall vents

Wall U Value 0.15 0.14

Floor U-Value 0.12 0.15

Roof U-Value 0.135 0.12

Airtightness 0.64 ach’s 5m³/hr/m²

Window U-Value 0.9 W/m2K 1.1 W/m²K

Y Value 0.01 W/M2K 0.06 W/m²K

Heat + power LPG Gas boiler Gas boiler

Renewables 7m2 vac tubes 6.5m² SHW

Heat demand 38kWh/m2 A2 55kWh/m2 A3

EPC 0.3 0.4

40%

20%

Permitted Design Energy

Space heat demand

2005 Regs

2008 Regs

2011 Regs

Passivhaus

A wine bottle

Space heat demand

2005 Regs

2008 Regs

2011 Regs

Passivhaus

7.5kWhFull of oil

Space and hot water heating oil per m2

Space heat demand

2005 Regs

2008 Regs

2011 Regs

Passivhaus

Passivhaus

solutionsto achieve

Part L 2011 compliance 2

02 Detail

03 Air Barrier

02 Analysis

26 Quality + Workmanship

Work outDetails before Tender to getControl of budget and Programme

25 Boundary with existing build

18 paper is cheap

Renovate

andExtend3

24 Fabric Design

Overview

20 EnerPHit Refurb

Plans

Apartments4

Mechanical5

Passivhaus

10 Services Coordination

Plans

32 Services Coordination and Fire Protection

Supply

Extract

External

33 M+E

Overview

Thank You

Overview