week 18: new heating and hot water system

Heating at last

Working very long days, our heating engineer has now got the new heating and hot water system commissioned. We are re-using our existing, relocated boiler, but this causes some last minute problems – it doesn’t fire. After sinking some new parts into it, we finally get it going again. The house took quite a few days to heat up – the new radiator sizes are tiny – sized to cope with the proposed thermal specification of the house, which is a little way off yet. But we’re warm and dry: perhaps not energy efficient yet, but as the heating has been off for the whole heating season so far, we’ll care more about efficiency at a later time – right now, it’s the warm that matters.

The hot water system is an OSO Twin Coil cylinder. At present it is indirectly fed from the boiler only – the solar collectors will follow when the budget allows!  The heating is served by three zones: one per floor, i.e. each floor can call the boiler for heat – they don’t have to be heated to the same temperature at the same time.

The photo shows the cylinder and valve station just prior to wiring/commissioning. There is more to do: remove temporary pipework; install insulation on new pipework; install lower ground floor heating. More to follow on this installation.

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2 thoughts on “week 18: new heating and hot water system

  1. Im interested that you have gone for three seperate zones i have been considering seperating the single zone system in my house as i frequently want more heat in the living rooms (kitchen/lounge/diner) but dont want the boiler heating up all the upstairs rooms as well. This usually ends up in me putting the fire on in the living room, which sort of defeats the object of a centrally heated system.

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