Demand and mind-set for a passive house in UK!
“The demand for Passivhaus is client-driven, but there will come a tipping point – the legislators will make it happen”, says Jonathan Hines from ARCHITYPE.
In the article, Jonathan talks about the situation with passive house in UK, where the key attractions for the passive house (or passivhaus) are the energy savings and low running costs. Giving an example of the Enterprise Center in Norwich where for the first two years of operations, heating energy consumption was less than 11 kWh/m2.a.
When the product used in the house is in compliance with passive house standard, i.e. it is passive house certified, there is a pretty much good guarantee that a building will perform well – in respect to low energy consumption and providing good thermal comfort inside for occupants.
And what about the cost of passive house in UK? Set your mind on higher budget!
“The assumption is that a high standard like Passivhaus always costs more,” says Hines. “My theory is that if you start a project thinking it is going to cost more, then it will; whereas with a tight, fixed budget the design is developed to deliver it to that budget.”
People from Architype have worked on many buildings built in passive house standard, with main focus on schools such as Oak Meadow Primary School, Bushbury Hills School and Wilkinson Primary School. In the design, they focused on more compact design to minimise external area and simplified detailing.
Do not stop and continue with monitoring!
Monitoring also showed internal heat gains in the schools were higher than in Germany because, in the UK, different space standards mean more children are squeezed into each square metre of floor space. “We discussed this with the Passivhaus Institute in Germany and they allowed us to tweak things slightly, so our second generation of schools had less glazing because we needed less solar gain,” explains Hines.
“Naturally ventilated schools rely on opening vents to bring in fresh air to keep CO2 levels down; if it’s cold outside and the windows are not opened, then CO2 levels rise dramatically. With the mechanical ventilation with heat recovery (MVHR) systems used in Passivhaus, you get a constant supply of fresh air,” Hines says. “Natural ventilation sounds lovely, but it is often just random, uncontrolled ventilation – from our monitoring, MVHR is a winner every time.”
Read more about interesting Swegon Air Academy Case Studies built as passive houses here!
- Garfield Passive House in Williamstown
- Passive house School Högåsskolan in Knivsta
- Hamnhuset in Gothenburg
- Stadsskogenskolan in Alingsås
- Trädgårdsstaden in Skövde