Passive House Drumderry

General information

The project brief was to design a CertifiedPassive House on a sloping site in Drumderry. The dwelling is approached frombelow. This family Bungalow achieved Passive House Certification and the Bungalow also has a Irish BER of A1 @ 6.73 kWh/ m2/ yr (Audited result).

This is a single storey family house located in the Irish countryside. The design is contributing minimal impact on the surrounding landscapes, taking advantage of natural daylight and optimising the free heat from the sun.

See more details about this project

https://www.winkens.ie/passivebc02.htm

Photo credit

Winkens Archiecture

Stakeholders

Contractor

Name : Sean O'Brien, General Contractor

Contact : Sean O Brien, Ballynastraw, Bunclody, Co. Wexford, Ireland

Construction Manager

Name : Winkens Architecture

Contact : Zeno Winkens, architect MRIAI

https://www.winkens.ie

Stakeholders

Function : Environmental consultancy

Andrew Lundberg

Andrew Lundberg, [email protected]

Http:///www.passivate.ie

Passive House Designer

Contracting method

General Contractor

Type of market

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If you had to do it again?

The builder was not used to building low energy dwellings. He was a good builder and needed quite some tutoring. Some of this torturing should have been done earlier in the build.

Building users opinion

We wanted and got a Passive House. The design works well and comfort levels are high throughout the Year.

Energy

Energy consumption

Primary energy need : 40,00 kWhpe/m².year
Primary energy need for standard building : 40,00 kWhpe/m².year

Calculation method : Other

Breakdown for energy consumption : Annual heating demand 16 kWh /(m2a )
Heating load 10 W/m2
According to PHPP

Envelope performance

More information :

Exterior wall:
Fully insulated cavity wall, with 250 mm expanded polystyrene injected into cavity
U-value = 0.129 W/(m2K)

Basement floor / floor slab:
Concrete floor slab insulated with 300 mm rigid insulation.
U-value = 0.107 W/(m2K)
Roof:
Timber roof construction insulated with 420 mm mineral wool insulation.
U-value = 0.084 W/(m2K)

Frame:
GUTMANN AG, MIRA therm 08
Timber frame with insulation and external aluminium shell
U w-value = 0.87 W/(m2K)

Glazing:
Saint-Gobain glass, CLIMATOP LUX
Triple glazing 52 mm. Glass type 4(6)Gr- safety tempered glass. Warm edge spacer swisspacer.
U g-value = 0.6 W/(m2K)
g -value = 62 %

Entrance door
Solid insulated door
U d-value = 0.86 W/(m2K)

Indicator : n50

Air Tightness Value : 0,57

More information

With the PV installation, the house needs only 6.73 kWhpe /(m2a ).

Real final energy consumption

Final Energy : 6,73 kWhfe/m².year

Renewables & systems

Systems

Heating system :

Geothermal heat pump

Hot water system :

Heat pump

Cooling system :

No cooling system

Ventilation system :

compensated Air Handling Unit

Renewable systems :

Solar photovoltaic
Heat pump (geothermal)

Other information on HVAC :

Ventilation :
Brink Climate Systems B.V., Renovent Excellent 300 (Plus)
Heat recovery ventilation system supplying fresh air to all living rooms and extracting from all wet rooms. Effective efficiency of 84%

Heating installation
Air to water heat pump used to underfloor heating distribution.

Domestic hot water
Direct electric water heater from PV panels with air to water heat pump contribution.

24.4 sq.m. of PV panels installed on the roof with an annual electricity yield of the inverter of approx 3678 kWh/a

Solutions enhancing nature free gains :

Reception rooms orientated due south fro solar gain.

Environment

Urban environment

Green field Site in rural Ireland. Slightly hilly area.

Land plot area : 6 500,00 m²
Built-up area : 4,00 %
Green space : 5 500,00

Products

Product

Heat pump

Unipipe.ie / Nibe

Unipipe

https://www.unipipe.ie/

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Heating system:
Air to water heat pump NIBE F2040 used to underfloor heating distribution.
Hot water , direct electric water heater from PV panels with air to water heat pump contribution.

The stake holder were happy

Brink MHRV

BRINK

https://www.brinkhrv.com/

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Ventilation:
Brink Climate Systems B.V., Renovent Excellent 300 (Plus)
Heat recovery ventilation system supplying fresh air to all living rooms and extracting from all wet rooms. Effective efficiency of 84%

The stakeholder were happy.

External; Windows and Doors

True Windows

http://www.truewindows.ie/

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Windows:
GUTMANN AG, MIRA therm 08, Timber frame with insulation and external aluminium shell
U w-value = 0.87 W/(m2K) Glazing Saint-Gobain glass, CLIMATOP LUX, Triple glazing 52 mm. Glass type 4(6)Gr- safety tempered glass. Warm edge spacer swisspacer. U g-value = 0.6 W/(m2K) g -value = 62 %

The stakeholder were happy.

PV Array

Solarelectric.ie

Paul Murphy

https://www.solarelectric.ie/

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Electricity:
24.4 sq.m. of PV 15 panels installed on the roof with an annual electricity yield of the inverter of approx 3678 kWh/a

The stakeholders were happy

Insulation Floor

Hytherm

https://www.xtratherm.com/

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Floor:
Strip foundation, concrete floor slab insulated with 300 mm rigid insulation EPS100. 65mm Sudanit 280 Fast Screed U-value = 0.107 W/(m2K)

The stakeholder were very happy with the products

Insulation Wall

Thermobead

Bunclody Insulations

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Walls: Fully insulated cavity wall, with 250 mm expanded polystyrene (bonded bead) injected into cavity
U-value = 0.129 W/(m2K)

The stakeholder were happy.

Insulation Ceiling

Isover

https://www.isover.ie/

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Roof:
Slated, timber roof trussed construction insulated with 420 mm Isover Heat shield, mineral wool insulation.
U-value = 0.084 W/(m2K) ceiling with suspended service cavity.

The stake holder were happy

Thermal Bridging

Passivate

Abdrew Lundberg

http://www.passivate.ie/

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Thermal bridging:.
Mix of Irish ACDs, Quinn lite certified details and bespoke. First 2 course of Quinn Lite blocks, low thermal conductivity teplo cavity wall ties. Calculated Y-factor (W/m2K) 0.019

The stakeholders were happy.

Costs