Anyone got a Heat Pump

B

BeanBeany

Well-known member
Got a price off our energy supplier about installing one and it not too expensive to make it a complete non-starter. Has anyone had one installed?

The big questions for me are:

Does it provide enough hot water, particularly for when we have guests staying when there might be 5 or 6 people wanting showers is short time.

Will it heat an early 20th century house to a reasonable 18 - 19 degrees when the weather gets really cold. The house is pretty well insulated but as a 100 year old house is always going to have a few draughts.

Is there much of a saving on fuel bills.
 
Really depends on your CoP numbers... If the maths work it will be cheaper but in the house you're describing it could be more expensive to run.
 
My understanding is you need to replace all your rads as you will need bigger rads due to the water being a lower temp so heating is on for longer

You also need space (about 2m square) for the gubbins and water tank to go in your house / garden but guesssing you know that if you've had a quote

Believe you still need a solution for "hot" water as it doesn't heat water to be actually hot so for showers, baths and the like you will still need gas or elec.

They make a bit more sense if you have solar as then the power they use is being generated a lot of the time. Even more sense if you have battery storage and access to cheap energy when solar isn't generating (e.g octopus agile with overnight tariff) as then you can top up battery when it's cheap, use solar when it's expensive.
 
Yes I have one.

I had a new gas combi boiler installed that just heats the water, it's also used as a back up and is set to take over the heating if the temp drops to less than -5 it's not strictly necessary, but made sense when we had our ASHP installed.

Yes it will heat your home to 18/19, and it will keep it to that temp, or less if you set it that way, but the recommendation is to just keep your home at a comfortable temp all the time, our house is 1940s and it's fine, and it's not noisy at all- some people say they are, ours certainly isn't.

It doesn't really save very much, as it requires a pump and that uses electric, gas is cheaper than electric, for now, suggestions are renewable electric will end up cheaper than gas in the future.

Yes we had all our rads replaced at the same time as the ASHP installed, so it all came with the price.

If I know now what I know now, would I have one installed. Yes 100%.
 
I read recently that there is a new generation of heat pumps that use Lithium on the way in the next couple of years. They will be a lot more environmentally friendly than existing ones and will not require you to have to replace all your radiators.
 
Because the radiator flow temps have to be set low you need to oversize the rads. You need to set the hot water tank to heat up before your heating comes on in the morning, so if you want a warm house at 6:30 then water needs to come on at about 4:30. If the water doesn't reach temperature in time then you need your immersion to kick in so you don't get legionella. They are ideally designed for underfloor heating and really well insulated houses.
 
We have one and have had no problems. Plenty of hot water and the house was warm throughout the winter. We had all radiators replaced when it was fitted.
 
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