Heating Separate Buildings

[IainH]

Advice much appreciated please.

 

The house we are building will have hybrid ASHP/LPG powered under floor heating.

 

Using the same equipment can I also heat a separate (180M2 with garage, workshop and 2 offices) which is 30m away from the dwelling - or will I need (or would it be best to have) a separate boiler?

 

Thanks in advance.

Edited March 23, 2019 by IainH

[Lesgrandepotato]

I don’t see why it can’t be ducted out to there. But an additional 180sqm is significant and you might find its easier to have two smaller installations? If not it might all be a bit commercial spec?

[A_L]

Since you are probably tripling the heat load can you manage with a single phase heat pump? Usually have to go three phase electricity at about 14kW thermal output.

 

UFH in the garage/workshop by running insulated pipework is easy enough but hot water for washing etc will be the problem.

 

Have you considered Non-Domestic RHI, 20 years instead of 7?

 

So single heat pump doable, just a few extra wrinkles to sort out.

[IainH]

Thanks for both replies.

 

After on site discussions today, the consensus from two trusted installers is to use a separate lpg boiler for the smaller unit.

 

We do have 3ph on site but that complicates things if we went for an industrial installation.

 

As someone said "keep it simple, stupid" (me, not anyone else).

 

Thanks again.