Passive House Builder Specialists in Invercargill & Gore
JW Building is Invercargill & Gore’s premier passive house builder, dedicated to creating highly energy-efficient and sustainable homes. Our expertise in passive house design and eco-home construction ensures that your new home will offer superior comfort.
What is a passive house?
Jonny is a certified passive house tradesperson, bringing specialised knowledge and skills to every project. With a commitment to excellence and a focus on achieving the highest standards of energy efficiency, Jonny and our Southland-based Master Builder team are here to deliver exceptional results. Explore the benefits of a passive house with JW Building and experience the difference in comfort and sustainability. Contact us today to discuss today for a passive home new build quote from our trusted builders.
A passive house is a performance standard that is well above the NZ building code which consumes up to 90% less energy for heating and cooling.
It has:
consistent temperature throughout the home (average 20 C, winter or summer),
continuous filtration of fresh air through a home ventilation system with heat recovery.
no mold or condensation anywhere.
Photo examples of passive houses are not the work of JW Building.
Image credits Markus Merz and Team Green Architects
Passive houses have a home ventilation system with heat recovery. This takes the old air from the wet parts of the house; the kitchen and bathrooms and exhausts it through a heat exchanger which is also bringing fresh outside air through that same heat exchanger. It works the same way in reverse as air-conditioning. So minimal energy is wasted by opening up windows to ventilate a home, although you can definitely still open your windows if you wish, but is not necessary.
Here are some tips for improving the performance of your home;
Minimize draughts. Even a gentle wind can suck the heat out of a building through gaps in the building fabric and through penetrations for pipes and wiring.
Use at least thermally broken windows, European timber triple glazed windows is best.
If in southland have 140mm thick walls and Insulate well above NZ Building Code with minimal weaknesses. i.e a design where the insulation can be consistent even to the edges and corners of the house.Minimize thermal bridges.
