Passive House Design

Passive House is the fastest growing energy performance standard in the world. It originated in Germany and the primary aim is to reduce energy and improve comfort. Designing requires intelligent design and a technical approach using the standards own PHP software. The 5 Passive House principles are thermal bridge free design, superior windows, ventilation with heat recovery, quality insulation and airtight construction. Despite what people say Passive House's still require minimal heating. Often a few radiators or heated towel rails are all that is required.

For a building to be considered a Passive House, it must meet the following criteria:

1. The Space Heating Energy Demand is not to exceed 15 kWh per square meter of net living space (treated floor area) per year to 10 W per square meter peak demand.

2. The Renewable Primary Energy Demand, the total energy to be used for all domestic applications (heating, hot water and domestic electricity) must not exceed 60 kWh per square meter of treated floor area per year for Passive house Classic.

3. In terms of Airtightness, a maximum of 0.6 air changes per hour at 50 pascals pressure, as verified with an onsite pressure test (in both pressurised and non pressurised states.)

4. Thermal Comfort must be met for all living areas during winter as well as in summer, with not more than 10% of the hours in a given year over 25 degrees celsius.

Directors Ian Armstrong and Nathan Davis are Certified Passive House Designers.

"Many of our buildings are designed with Passive House in mind adopting design principles to allow for solar gain, minimise overheating, super insulated with a fabric first approach, good levels of air tightness, high quality external joinery, Mechanical Ventilation and Heat Recovery (MVHR) and minimal heating."

                                                                                  Ian Armstrong - Director