Pleurococcus on my ...
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Pleurococcus on my fins

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Trusted Member Member
409 kWhs
Joined: 1 year ago
Posts: 25
Topic starter  

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.

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?

Noble Member Contributor
3192 kWhs
Joined: 2 years ago
Posts: 382

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.

Mars and glpinxit reacted
Illustrious Member Admin
17642 kWhs
Joined: 3 years ago
Posts: 2379

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.

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