Not exact matches
The first blower
door test result was 0.59 air changes per hour (ACH), prior to insulating the envelope, which everyone was keen to improve on as it only marginally passed the
passive house standard and was prior to fitting services, which are known to increase the risk of air leaks.
A diagnostic initial blower
door test, done when the external envelope was completed on one of the development's show
houses, took place on December 12 and delivered a worldbeating result of 0.16 air changes per hour (ACH), well inside the
passive house standard of 0.6 ACH and the best result this magazine has ever noted for a masonry building.
Next we modelled our high performance envelope scenario to see what would be required for compliance if using a boiler and found that near
passive house levels of insulation and airtightness would be needed for all three
house types, with U-values of 0.13 for opaque elements, 1.2 for windows and
doors and an airtightness of 1.0 m3 / h / m2).
«Today, you wouldn't question [using] the
passive house standard windows and
doors throughout,» says Whiriskey, «but at the time, we did what we could within budgeting constraints.
Architect (planning drawings & project supervision): Mola Architecture Architect (working drawings &
passive house details): Natalie Walsh Contractor: Pat Doran Construction M&E engineer: Ethos Engineering Structural engineer: Garland Consultancy
Passive house consultants: Integrated Energy, Target Zero
Passive house certification: Mead Consulting BER: Rate My Home Quantity surveyor (client): KMCS Quantity surveyor (contractor): RTC Surveying Electrical contractor: Jones Engineering Group Plumbing: Prospect Plumbing & Heating Underfloor heating contractor: Base Engineering Underfloor heating system: Polytherm MVHR: Flynn Heat Recovery Air - to - air heat pump: Panasonic Fan coil units: Tech Refrigeration Solar thermal: Alternative Energy Ireland Airtightness testing: Greenbuild EPS insulation: Airpacks External render: Neotherm External insulation contractor: Enda Linnane Construction Mineral wool insulation: Isover Airtightness products: Siga Breather membranes: Ecological Building Systems Floor insulation: Xtratherm Thermal breaks: Partel Low thermal conductivity blocks: Quinnlite Roof insulation & airtightness contractor: Baker & Co Windows &
doors: Rationel Curtain walling: Lakeside Windows Roof windows: Tradecraft Pet
door: Petwalk Polished concrete floor: Renobuild Roofing: Christy McMahon Carpentry
The
passive house standard may be acceptable as an alternative method of compliance with Ireland's stringent energy efficiency regulations, according to a leading expert in energy and construction law, leaving the
door open to a similar approach in the UK.
And a
passive house requires a tremendous amount of insulation: 17,000 pounds of dense - pack cellulose in the walls, contained in a 12 - inch «pocket» surrounding the entire
house; 2 feet of loose - fill insulation in the roof; triple - pane windows filled with argon gas; and
doors so well sealed and insulated that they provide as much protection as the walls in most
houses.
Initially, the Alkatouts were planning to retrofit their home, but when the
house next
door went up for sale, they decided to buy it, raze it, and build from scratch the most ecologically responsible
house they could afford using
passive - construction techniques.
The
house, designed by renowned Swedish architect Gert Windgård, is not designated a
passive house per se, but is said to maximize its own electricity production through a complete front facade of solar panels (solar water heating and solar electric) and minimize heat loss through a double -
doored entry, built - out window boxes and fantastic insulation.
To meet the definitions of an energy - stingy
passive house, the apartments must be newly (and much more thickly) insulated, equipped with more efficient appliances and lighting, and more energy - efficient windows and
doors will be installed.
The detached masonry build had beaten the 0.6 ACH
passive house airtightness target during a blower
door test a few days earlier.