A terrace of 3 houses. Each house is 2 storey. 2 plots have 2 bedrooms each, and one plot has 3 bedrooms plus a 4th room which can be used as a study or bedroom.
Photos of Passivhaus
Thermal Envelope Details
Exterior wall
The wall construction is a Passivhaus Certified competent from Frame Homes UK. The product name is Frame Ultra which consists of 235 mm mineral wool with the timber frame panel, with 50 mm mineral wool internally (services void) and 50 mm mineral wool externally.
U-value = 0.105 W/(m2K)
Basement floor / floor slab
Floor insulation is 300 mm XPS. Thermal bridging at the floor edge is mitigated with an aerated concrete block and cavity insulation between the slab edge and brick/blockwork.
U-value = 0.106 W/(m2K)
Frame
Ideal Combi, Futura+
0.98
U w-value = 0.8 W/(m2K)
Roof
The roof is insulated at joist level with 150 mm mineral wool between joists, and 300 mm above.
U-value = 0.096 W/(m2K)
Glazing
Pilkington, argon filled;
4|14|4|16|4 and 4|16|4|18|7
U g-value = 0.61 W/(m2K)
g -value = 52 %
Entrance door
Ideal Combi Frame IC
U d-value = 0.82 W/(m2K)
Mechanical systems
Ventilation
Zehnder, ComfoAir Q350
Unit Heat Recovery – 91%
Effective Heat Recovery Efficiency – 89% (end terrace) / 82% (mid terrace)
Electrical Efficiency – 0,24 Wh/m³
Heating installation
Heating is provided by direct electric radiators.
Domestic hot water
Hot water is provided by an Edel Hot Water Heat Pump in each dwelling.
Ecological aspects
10.32 kWp of Solar PV
PHPP values
Climate
Warm, temperate
Air tightness
n50 = 0.45/h
Annual heating demand
13 kWh /(m2a ) calculated according to PHPP
Heating load
9 W/m2
PE demand (non-renewable Primary Energy)
68 kWh /(m2a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP
PER demand (renewable Primary Energy)
55 kWh /(m2a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP
Generation of renewable energy
66 kWh /(m2a ) based on the projected area
Location in Bristol
UK – BS48 4BF Bristol
Passivhaus Architect(s) Involved
APG Architecture
Building services
Greengauge Building Energy Consultants
Building physics
Greengauge Building Energy Consultants
Certifier
Etude Consulting
Statics
JDL Consultants
Craftsperson / parties involved
Stonewood Homes
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