Spoogster Posted April 23, 2021 Share Posted April 23, 2021 Hi all Our OVO heat trial design is dragging, due to the installer saying our airing cupboard 750mm x 770mm x 2.4m being too small to put a Daikin 250 l UVC, buffer, expansion and the OVO monitoring kit in. Question: is it possible to put the buffer and expansion vessel in the loft above the UVC?. Loads of space in there and I assume it would be possible to add insulation to those items in the loft. Are there building regs issues with this idea? Looks like others have done it. TIA Jason Link to comment Share on other sites More sharing options...
PeterW Posted April 23, 2021 Share Posted April 23, 2021 No issue with any of that. If you’re having a UVC in an airing cupboard where are they routing the PReV outlet to as it needs to be close to a drain. Link to comment Share on other sites More sharing options...
Spoogster Posted April 23, 2021 Author Share Posted April 23, 2021 24 minutes ago, PeterW said: No issue with any of that. If you’re having a UVC in an airing cupboard where are they routing the PReV outlet to as it needs to be close to a drain. What is a PReV outlet? We have an overflow / blow out pipe (sorry not sure exact term) already so I assume it would reuse that, but it just goes to the outside wall at first floor and not a drain Link to comment Share on other sites More sharing options...
PeterW Posted April 23, 2021 Share Posted April 23, 2021 Nope a Pressure Relief Valve from a tank (and usually teed with an expansion) has to run to a drain or safe location. Part G section 3.62 refers to safe discharge from a pressurised vessel. Link to comment Share on other sites More sharing options...
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