Is the thermostat remote?
Where is it placed.
Do you have thermostatic Rad Valves?
Is it a combi boiler (doing hot water as well as heat)?
If so is the setting on the front of the Boiler turned up to the full on the Heating Part.
A modern boiler should have no problem in geting the house up to 25%.
The radiatiors should be too hot for you to keep your hand on....are they?
It may be worth checking that they have put in the right size boiler.
Where is it placed.
Do you have thermostatic Rad Valves?
Is it a combi boiler (doing hot water as well as heat)?
If so is the setting on the front of the Boiler turned up to the full on the Heating Part.
A modern boiler should have no problem in geting the house up to 25%.
The radiatiors should be too hot for you to keep your hand on....are they?
It may be worth checking that they have put in the right size boiler.
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