The concept for COOLHOUSE Collection comes from the first certified Passive House in Australasia, designed and built by Jessop Architects. COOLHOUSE uses these low energy practices to deliver a quality home in excess of current New Zealand building code standards. We have specifically modelled our designs to suit the New Zealand climate, specifications vary depending on location. They are healthy, warm and comfortable, low energy and durable. Architecturally designed by award-winning architect Darren Jessop, these homes feature clean lines and functional living spaces that make them beautiful too.
COOLHOUSE is currently building in the upper north region of greater Auckland, throughout the Coromandel and in the greater Christchurch area. Coolhouse can build nationwide, pending builder availability.
Low Energy Benefits
COOLHOUSE harnesses green, sustainable practices and combines them with international performance standards.
It has superior strength and uses superior insulation properties to ensure no mould or mildew, resulting in a cleaner, healthier living environment.
A COOLHOUSE maintains temperature more easily than a traditional house that meets the building code.
The COOLHOUSE building envelope means the insulation properties will not break down and will insulate to 100% of its value for the life of the building. Ongoing energy consumption is reduced, decreasing the household’s impact on the environment and returns considerable cost savings on energy bills.
COOLHOUSE utilises modern construction processes and partners it with passive house technologies to deliver a fast and efficient building model.
Wool insulation in external walls-R 4.8
Wool insulation in ceiling-R 6.2
Airtightness describes how non-draughty the building structure is. Contrary to previous belief, it is now considered hugely important to achieve an airtight building envelope. Draughts are not only uncomfortable but can contribute to significant heat losses. Constructing an airtight building envelope improves sound protection and saves energy by ensuring that the ventilation system operates most efficiently.The airtight envelope is achieved by wrapping the whole building with ‘Intello’ variable humidity airtightness membrane (building paper). This includes placing membrane along all the connections between various building elements i.e between walls/window and walls/ceilings, taping all joins in the membrane and taping around all services that protrude through it.
Available Build Types
A passive house (Passivhaus) is a well insulated, virtually airtight building that is primarily heated by passive gain. This means that the building’s interior climate can be maintained at a comfortable level without active heating and cooling systems – the house heats and cools itself, hence ‘passive’.
The Passivhaus standard requires that the building fulfills the following requirements:
– The building must be designed to have an annual heating demand as calculated with the Passivehaus planning package of not more than 15 kWh/m per year in heating and 15 kWh/m per year cooling energy OR with a peak heat load of 10W/m.
– Total primary energy consumption (primary energy for heating, hot water and electricity) must not be more than 120 kWh/m per year.
A low energy house is well insulated and energy efficient, just not as airtight as a Passive House. You won’t have the official Passive House Certification but will still enjoy a healthy, warm, dry home.
The term ‘low-energy home’ refers to the following:
– A building with an annual heating demand in the range of 20 kWh/m to 40 kWh/m per annum.
– The building must not leak more than 1.5 times the house volume in air per hour (n50 ≤ 1.5 / hour), at 50 PA (N/m.) as established by a Blower Door Test. (NZ Building Code achieves approx. 7/hour)
An NZBC standard home is built to the level of specification outlined by the NZ Building Code 2004. We still incorporate a higher level of spec in these homes and they contain the following as a standard:
– Double glazed windows and aluminium Joinery
– HRV home ventilation system