Favorite rad sizing tool?

[Knappers]

Does anyone have a favorite rad sizing app or site? I've used a few but they seen to vary and many are quite clunky.
Any out there with decent accuracy, a whole house report would be amazing too...

 

[Last Plumber]

Good old fashioned sheet from manufacturer. I tend to look at Stelrad sheets.
Print one off and leave it in the van.

 

[Enthalpy]

I tried a few last year before replacing all my radiators and liked the Myson Heat Loss Manager best because it lists the heat loss from each room for each element: glazing, external wall, floor. roof glazing, roof, ventilation and heat-up factor.

Of course this needs some work to enter all the details but a calculation is only as good as the data input.

 

[Ben-gee]

I tried a few last year before replacing all my radiators and liked the Myson Heat Loss Manager best because it lists the heat loss from each room for each element: glazing, external wall, floor. roof glazing, roof, ventilation and heat-up factor.

Of course this needs some work to enter all the details but a calculation is only as good as the data input.

That sounds good, it could also help highlight where it might be worth spending money to improve heat retention.

 

[ShaunCorbs]

Depends for rad swaps / new ch I use the mr combi Heatloss

If they want a report and on an ashp system I use Heat Engineer - https://www.heat-engineer.com/