My heat pump is too big for my house most of the time.
I want to heat an extra room, an insulated timber office of about 20m2
The office is on the back of our garage and the garage is adjoined to the house.
I have access to flow and return pipes from radiators in the house and want to spur from those to create a loop in the office.
The extra pipe run to the new radiators would be about 8m of pipe length including rises and falls.
I am concerned about getting water that far when it is already at the furthest point from the heat pump, a Daikin 9kW Altherma 3 monobloc
Just adding a second circulation pump seems like a bad idea so I have plan to ensure flow to the office radiators.
My plan is to add a 4 pipe buffer tank in the garage fed from the radiator in that corner of the house and then add a circulation pump on the office radiator circuit fed by the buffer tank.
Would this work?
It’s quite simple to do and I think it would get heat to the office without disrupting the house heating circuits or the heat pump.