Heating requirement calculations...

[Mulberry View]

What is the usual process for ascertaining heating need? Does an Underfloor Heating designer take care of this? Or is it down to who specifies the Heat Pump?

 

We have upped the specification of several of our thermal elements (Floor insulation thickness, Roof insulation thickness, Window u-Value and expected Air-tightness to name a few), I think I need to get my original 'as designed' SAP updated to include the changes so I have something upon which the heat loss calcs can be taken from, does this sound like the right approach?

[JohnMo]

9 minutes ago, Mulberry View said:

Does an Underfloor Heating designer take care of this?

Very much doubt it from what I've seen. Think they just cut and paste the last job into your floorplan.

 

Go to boffins corner, there is a heat loss calculation spreadsheet in there. Use that it's pretty good.

 

If an MCS (grant) install the install company does the heat loss calculation. But you should always do your own calculations anyway.

 

You will need an as built SAP anyway. Not for the grant but for building sign off, assuming new build.

 

Couple of different factors for heat pump size. Obviously heat loss, cylinder heating. If a low energy loss house with a decent depth of screed, you can run the heat pump in batch charge mode during cheap electric price periods or run weather compensation.

 

Cheap rate batch charge is ideal for a bigger heat pump, because you need to cram in 24 hrs of heat in a shorter time period. So works like a storage heater.