Here’s some 125mm diameter heat recovery pipework over the kitchen. It’s one thing working out what you need on paper, but working in 3D with the really thing is very different, and you find you are ordering more and more pipes, bends, connectors etc.
Initially we thought the best place for the heat recovery unit would be over the kitchen and bathrooms, but after working on it in that position for a day there was a sudden eureka moment when we realised that putting it on the other side of the house would shorten 2 of the 4 pipe systems (fresh air inlet and “wet” air exhaust) substantially so we remounted the unit and started our three dimensional puzzle afresh.
