ASHP: monobloc, split or combi?

[AndySat]

On 25/01/2025 at 07:09, Beelbeebub said:

I think the benefit is from the manufacturer pov. The outdoor unit is a standard aircon unit

I agree. Having a standard unit is probably a good thing in terms of price and reliability, but my current thinking is to go with a monobloc - simpler and uses less space in the plant room. Plus it puts any potentially noisy bits outside.

The UFH will be a single zone and based around WC instead of thermostats. But I may hedge my bets and at least run the wiring for a thermostat in the bedrooms...

 

[JohnMo]

1 hour ago, AndySat said:

But I may hedge my bets and at least run the wiring for a thermostat in the bedrooms...

Just do wireless thermostat, easy, battery lasts a couple of years. You can also move it about.

 

We are running WC but use a thermostat to trigger a second operating point, basically WC plus 2 degrees. Use the thermostat to force the heat pump to run hotter during cheap rates period and also shelly relay across the terminals of the receiver to drive the heat pump hotter during excess solar production periods. Converted 3kWh of excess solar in to 11.5kWh of heat today for free.

[AartWessels]

On 24/01/2025 at 15:44, PhilT said:

Surely it's similar to the English scheme whereby you can apply for the 7500 grant for a self build if it meets certain criteria

No, I don't think so. As far as I am aware there are no grants available here for self build. 

[JohnMo]

28 minutes ago, AartWessels said:

No, I don't think so. As far as I am aware there are no grants available here for self build. 

I looked also, but from I could see, the £7500 is England and Wales. Grants for heat pumps is for people on benefits in Scotland. Nothing for new builds anyway.

 

I got my ASHP from eBay, there are plenty of bargains coming up. There were a couple of 6kW for £600, New unused.

[AartWessels]

1 hour ago, JohnMo said:

I looked also, but from I could see, the £7500 is England and Wales. Grants for heat pumps is for people on benefits in Scotland. Nothing for new builds anyway.

 

I got my ASHP from eBay, there are plenty of bargains coming up. There were a couple of 6kW for £600, New unused.

That's what I've been looking for as well. Not been lucky yet, but I guess I will be at some point.