Pleurococcus on my fins - Air Source Heat Pumps (ASHPs) https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/ Questions and discussions about renewable heating and heat pumps en-GB Tue, 06 Oct 2026 16:12:25 +0000 wpForo 60 RE: Pleurococcus on my fins https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/#post-23526 Thu, 23 Nov 2023 08:42:29 +0000 I’m inclined to agree with Ally. Don’t use anything abrasive. Have you tried a soft brush with soapy water? A mild vinegar solution could also work. I’d apply the solution to the fins with a spray bottle and let it sit for 10-15 minutes before rinsing it off with clean water.

]]> Air Source Heat Pumps (ASHPs) Mars https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/#post-23526 RE: Pleurococcus on my fins https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/#post-23478 Tue, 21 Nov 2023 21:14:47 +0000 There are specialist cleaning solutions for heat exchanger fin coils. I would recommend you have the heat exchanger cleaned as part of a professional service. A diluted bleach solution would kill any biological growth, but needs to be carefully applied. Don't steam clean or apply under high pressure, e.g.: not with a pressure washer. Most ASHP coil fins ae aluminium, copper is much more expensive and used in commercial applications, it's naturally resistant to biological growth.

]]> Air Source Heat Pumps (ASHPs) AllyFish https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/#post-23478 Pleurococcus on my fins https://renewableheatinghub.co.uk/forums/renewable-heating-air-source-heap-pumps-ashps/pleurococcus-on-my-fins/#post-23475 Tue, 21 Nov 2023 18:59:43 +0000 Here in Somerset it is seldom dry and I've begun to notice that our heat pump fins are turning a bit green. This is pleurococcus and I'm sure it will reduce the efficiency a bit. https://herbaria.plants.ox.ac.uk/bol/plants400/profiles/OP/Pleurococcus

I'm thinking of spraying the fins with 'Patio Magic' which I use on the patio, fence and conservatory when they look a bit green. Any thoughts? 

https://www.lovethegarden.com/uk-en/patio-magic

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