A prerequisite for international passive house construction is a heating load of 10w/sqm. Furthermore the combined primary energy consumption for the living area may not exceed 120kWh/(m²a) for heating, hot water and household electricity.

PASSIVE HOUSE

A passive house is a building in which indoor air temperatures above the WHO (World Health Organisation) recommended minimum of 18°C are maintained year round without active heating and cooling systems. The house heats and cools itself, hence the term “passive.”

.ZERO ENERGY HOUSE

The minimal amount of external energy needed to provided a comfortable and healthy indoor climate in a Passive House will be covered with renewables, to be produced on site.

ZERO + Zero fossil fuel + 100% Renewable energy resources + Reduction of energy requirements by Passive House Standard design + Low embodied-energy materials

.

PLUS+ Increase of Indoor Environmental Quality (IEQ) according to WHO and ISO standards

Quality of materials, construction and fabrication + High quality design in adoption to New Zealand lifestyle, needs and desires + User friendly solutions in design and technology + Biodiversity principles at the urban scale (mixed-use, mixed generations, mixed typologies) + Intensifying the landscape component to urban living environments

[arc/sec] REACTIVE ARCHITECTUREST PAUL ST GALLERY 11.Sept.08 - 4.Oct.08

PASSIVE SOLAR VS PASSIVE HOUSE

Passive Solar Passive HouseSpecific insolationrequirements

Works with minimal solar gains (e.g. southern orientation)

Additional thermal mass requirements

Does not need additional thermal mass

Needs favourable weather conditions to be comfortable

Is comfortable year round

Provides solar gains predominantly during Spring and Fall

No heating requirements during Spring and Fall

Relies on natural forces for ventilation

Uses controlled mechanical ventilation

Design principles are widely promoted

Clearly defined and proven concept

WHAT IS A PASSIVE HOUSE ?

Very good and

uninterrupted insulation of

the whole building shell

Highly energy efficient

transparent building

elements

Draft-proof building

envelope

Heat recovery ventilation

Excellent indoor comfort

Excellent indoor

environmental quality

HEAT RECOVERY VENTILATION – COLD SEASON

pre-warmed

(1) Stale air is exhausted in parts of the house, where moisture and odour is produced predominantly (like kitchens and bathrooms);

(2) fresh air is transported to the living- and bedrooms, passing through an air-to-air heat exchanger

(3) where it is warmed by the exhausted air. Both airways are strictly separated by a thin membrane (contact-free). The fresh air is pre-warmed by a brine-to air ground heat exchanger (4), which doubles as frost protection.

HEAT RECOVERY VENTILATION – WARM SEASON

pre-cooled and dehumidified

(1) Stale air is exhausted in parts of the house, where moisture and odour is produced predominantly (like kitchens and bathrooms);

(2) fresh air is transported to the living-and bedrooms. The air-to-air heat exchanger

(3) is bypassed. Fresh air is pre-cooled by a brine-to air ground heat exchanger

(4) The brine is circulating through the ground and thereby cooled. By passing the cool brine the incoming air will give up a proportion of their moisture load through condensation. Condensate is collected and led into the sewage system. Incoming air is thereby dried and slightly cooled.