Pre-install Air Sou...
Clear all

Pre-install Air Source System question.

4 Posts
3 Users
1 Reactions
Active Member Member
25 kWhs
Joined: 1 month ago
Posts: 2
Topic starter  


We have just been approved to have our oil fired CH changed to Air Source. 
I am confused as to how the radiator part will work. 
it won’t have Smart TRV’s. The guy who inspected our house said “you just turn up and down the rad valves and they get hotter”. But, how does the system know? Is the pump on constantly and a temperature sensor works out in & out temps?

I have used tado for years and would ultimately get our new system ‘smart’. Maybe that’s another subject?



Noble Member Contributor
2920 kWhs
Joined: 2 years ago
Posts: 416

Hi @essgeesee

Welcome to the forum. Heat pumps work best without zoning or TRV's turning radiators on and off regularly. The way a lot of us use ours is to set up a weather compensation curve and then just set the standard radiator valves so that each room is the correct temperature.

If you havent come across weather compensation before it just means that as the outside temperature becomes colder, the water flow temperature in the radiators becomes hotter. Once set up this produces a constant temperature in the room whatever the outside is doing and there is no need to turn a radiator on and off like a traditional boiler would do.

Hope that helps

House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Heatpump Stats:

Mars reacted
Active Member Member
25 kWhs
Joined: 1 month ago
Posts: 2
Topic starter  

@bontwoody - Resources for ‘weather compensation’, please?

Illustrious Member Admin
17034 kWhs
Joined: 3 years ago
Posts: 2341

@essgeesee here you go:

Written by @allyfish

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide:

Follow our sustainability journey at My Home Farm:


Join Us!

Latest Posts

Heat Pump Humour

Members Online

x  Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
Shield Security