2. PASSIVE HOUSE
A passive house is a building in which indoor air temperatures A prerequisite for
above the WHO (World Health Organisation) recommended international passive
minimum of 18°C are maintained year round without active house construction is a
heating and cooling systems. The house heats and cools itself, heating load of 10w/sqm.
Furthermore the
hence the term “passive.” combined primary energy
consumption for the living
area may not exceed
120kWh/(m²a) for
heating, hot water and
. household electricity.
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.
3. 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
10. PASSIVE SOLAR VS PASSIVE HOUSE
Passive Solar Passive House
Specific insolation Works with minimal
requirements solar gains (e.g.
southern orientation)
Additional thermal Does not need
mass requirements additional thermal
mass
Needs favourable Is comfortable year
weather conditions to round
be comfortable
Provides solar gains No heating
predominantly during requirements during
Spring and Fall Spring and Fall
Relies on natural Uses controlled
forces for ventilation mechanical
ventilation
Design principles are Clearly defined and
widely promoted proven concept
11. 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
12. 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.
13. 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.
