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Solid manhole cover within r290 exclusion zone

 
Air Source Heat Pumps (ASHPs)
Last Post by dbrb2 1 month ago
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 dbrb2
(@dbrb2)
New Member Member
Joined: 1 month ago
Posts: 2
Topic starter 08/03/2025 12:06 pm  

Hi

I'm looking to install an exothermic plus 7kw 

I seem to just about have space, except that there is a solid metal manhole cover within the exclusion zone.  This cover,  if removed, goes down to the foul drains.

The manual states "airtight drains" are allowed.  This cover has no holes,  but I have no idea if it's actually airtight....

Any thoughts?

This topic was modified 1 month ago by Mars

   
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 Judith
(@judith)
Prominent Member Member
Joined: 1 year ago
Posts: 332
09/03/2025 2:31 pm  

Please provide photos or model if you can find it in a builders merchants. Even if yours isn’t airtight it might be an easy change.

Someone might recognise it!

2kW + Growatt & 4kW +Sunnyboy PV on south-facing roof Solar thermal. 9.5kWh Givenergy battery with AC3. MVHR. Vaillant 7kW ASHP (very pleased with it) open system operating on WC


   
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 dbrb2
(@dbrb2)
New Member Member
Joined: 1 month ago
Posts: 2
Topic starter 09/03/2025 3:50 pm  
Screenshot 20250309 144644 Gmail
20250308 094226

Thanks!

I asked Vaillant, and they say I should be fine even if I can't vouch for the airtightness of the cover,  which is good

 

This post was modified 1 month ago by Mars

   
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