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Zoning Central Heating Query

fergalom · 2015-07-24 15:36:27

Moved into house built 1998, all rads and hot water on same circuit. Modern outdoor condensing boiler. I want to zone the HW off from the heating as is norm these days. Flow/return from boiler is underground in a 4" duct until middle of the house, where it runs up between walls into hot press and feed hot water cylinder…

24-07-2015 03:36PM

#1

fergalom

Registered Users, Registered Users 2 Posts: 113 ✭✭

Join Date: June 2008

Posts: 98

Moved into house built 1998, all rads and hot water on same circuit.
Modern outdoor condensing boiler.

I want to zone the HW off from the heating as is norm these days.

Flow/return from boiler is underground in a 4" duct until middle of the house, where it runs up between walls into hot press and feed hot water cylinder and rads on 1st floor.

Rather than tearing a wall apart to get 2port valves in before it tees off for ground floor rads, I'm proposing to put a 3port diverter valve on the feed into the HW cylinder instead and a non-return on its outlet.

This would be sort of a hybrid zoning, i.e. Zone 1 = heating on or Zone 2 = heating & HW on.
Any reason I should not do this?

(Have a plumber coming but want to get some opinions on best course of action first)

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