oil central heating

patjess

Looking for advice. My current central heating system consists of oil fired boiler and each radiator fitted with trv themostatic valves. the problem is cost, ie the system heats up and is controlled by the boiler thermostat and the turning up or down each individual rad valve.
Recently had a frost stat fitted with a pipe thermostat, the affect is superb, the boiler keeps cutting in and out keeping a trickle heat with amazing effect throughout the house, but on very economical boiler running time. how can I repeat the same effect with a variable / adjustable thermostat so that the boiler responds only to the set water temp within the pipes rather than the boiler or rad valves

Ebe_Scrooge

A frost stat should only be cutting in if the temperature drops to below about 5 degrees or so ( depending on what it's set to ). It's job is simply to prevent the pipes freezing, it shouldn't be telling the boiler to heat the house to a cosy 20 degrees or whatever.


To control the temperature of the house, the standard solution is to fit a room thermostat - this then tells the boiler to switch on and off to maintain the temperature you've set. TRVs can then be used to alter the temperature of different rooms ( perhaps you might want the lounge to be warmer than the bedroom, for instance ).

G_M

Why not do what building regulations require, and what common sense dictates?

Fit a room stat?

Cardew

As said above a 'frost stat' is to prevent frost damage.

I wonder if the OP is referring to weather compensation. This adjusts the water temperature according to the outside temperature.

malc_b

How old is this oil boiler I wonder? Only old systems relied on a boiler stat. Modern system would have had a room stat. If it is an old boiler then there could be a saving to be made replacing it with new more efficient one. Also, does the system already have a room stat I wonder since OP says each radiator has a TRV which would mess up a room stat as the radiator near the stat should not have a TRV (if it does then TRV should be set to max).