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HEATING, VENTILATION & SERVICES
All domestic hot water comes from air-to- water heat pump in this scenario; the HPW 300 for instance, which is a pre-plumbed 300 L water cylinder with integrated heat pump also has a secondary coil to provide for up to 20 m² of wet underfloor heating in bathrooms, or it can accept heat from a solar thermal heat source, so even the heat pump doesn’t need to heat the water in the sunniest months.
For smaller homes like townhouses and
flats, the Passivhaus certified Pichler PKOM 4 compact service unit could be specified, as it performs all of the functions of the larger model, but in one compact box – so suitable where floorspace is at a premium. If homes are going to be increasingly well-insulated and air-tight, then MVHR is essential. However, by utilising the ventilation infrastructure for heating and cooling purposes too, heat pump ventilation can assist homeowners and specifiers in reducing build time, the number of trades on site and installation costs, all while meeting those all-important carbon reductions.
A Passivhaus-certified compact service unit located in a utility room; heat recovery ventilation with two integral heat pumps – one for space heating and one for water
The principle behind heat pump ventilation is grounded in health and sustainability, but importantly, conserving
BENEFITS OF HEAT PUMP VENTILATION
• Energy efficient heating with COPs of three to seven
• Energy efficient cooling with EER of 4.5
• Circa 1,000 litres of energy efficient hot water per day
• Supplementary heating efficiently controlled with quick effect
• Constant fresh air filtered for pollen & allergens down to 0.01 microns
• Heat recovery ventilation • No separate heating system required (if home well insulated & airtight)
and recovering more heat initially using this combined technology, means that less heat needs to be generated in the long term.
Clarissa Youden is associate director at Total Home Environment
WWW.ARCHITECTSDATAFILE.CO.UK
ADF NOVEMBER/DECEMBER 2024
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