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Cooling with air to water heat pumps

Papahuhu · 2026-06-01T09:41:02Z

From what I understand, all ASHPs can cool, it’s just that if they cool the rads they will drip condensation and rust. I was wondering if you could add a diverter valve that fed the cool supply to an air handling unit in the loft that fed cool air through vents in the bedroom ceilings. In theory, that cooled air should sink downstairs to knock the edge off the heat there too. I guess there would need to be a condensate line on the air handling unit to minimise any mould growth and maybe some sort of bag or panel filtration too. Doesn’t seem massively complex.

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Air Source Heat Pumps (ASHPs)

Last Post by springswood 2 hours ago

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springswood

(@springswood)

Eminent Member Member

Joined: 1 year ago

Posts: 28

26/08/2026 5:57 am

A quick update.

I finally found a 'solar' roller blind with a silvered outside face. It actually wasn't any more effective than the white venetian blinds I already had so I'm not sticking with it.

I have had new double glazing all round. The clincher was that the window openings weren't accessible. To get good ventilation over night I was climbing over furniture in every room. I think it will reduce my solar gain. Not least because with wider frames the glass area is reduced quite a bit. Ventilation is also much better. There's been no heat wave since it went in but if we get another I'll let you know.

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