Are ASHP the way to go?

Mstty

matt_drummer said:

Mstty said:

I would hope.a new system would achieve a cop of 4 over the year so please do keep the statistics coming and your experience.

Have you capped your gas and don't forget the £100+.saving there for no standing charge.

I will be happy with a SCOP of 3 or more, I based my calculations on 3 so any better will be a bonus.

I know we won't be cold from testing the heating yesterday, the radiators were as hot as they were with our gas boiler. 

I plan to run on pure weather compensation. I will have to wait for the cold weather to find out how low we can go on the leaving water temperature.

It looks like a good install, there's not too much pipework outside, the pipework is all the right size, our radiators are good and the house is very well insulated. It should be fine.

The gas meter is gone and the supply is capped off. One of the benefits of using Octopus was that the installers could deal with the gas disconnection, they also did all the work required in the electricity meter cabinet. If I had use an independent installer I would have had to have the energy supplier out to do that work separately.

My gas is already showing as finished in my Octopus account.

Well for reference our 8 year old Mitsubishi Ecodan in the last year managed a COP of 3.5 Weather compensation curve manually set and I still think I can bring it down 1 degree this year across the curve.

Our tank went from 23oC to 45oC for 900w yesterday which is more than enough heat for 2 days of showering for the household.

matt_drummer

Magnitio said:

matt_drummer said:

Our install is now complete.

We heated our 205 litre hot water tank today and it used 1 kWh of electricity, normally we would use around 6 kWh of gas and that wouldn't be from completely cold.

The heating has been tested and the radiators get as hot as they did with our gas boiler at the current settings. Obviously, I can dial it back a lot.

The airing cupboard looks amazing, the old install was a mess.

My wife just had a shower, the improvement in our hot water system was worth the cost on its own, she hated our old booster pump.

i couldn't be happier.

Any photos?

Yes.

We have some tidying up to do outside and some strategic planting to do.

matt_drummer

More from inside.

matt_drummer

And outside

Reed_Richards

What is the white cylinder top right "...ukin"?  I thought it might be a buffer but it doesn't seem to have enough connections.

matelodave

Thats a nice neat installation.

Now the funs starts as you can optimise it to suit you own requirements. 

I'm looking forward to seeing how it performs, ours took us the first winter to get it tweaked. The secret being to only adjust one thing at a time, keep notes of what you did, and what effect it had and, most of all,  give it a couple of days to settle down between adjustments.

Like Mssty above we have our hot water down to 45 degrees and it uses around 1kwh every two days to give us enough hot water for a shower each a day and a bit of washing up.

We have underfloor heating and run ours at around between 30-40 (averaging around 33-35) so it takes ages for the effect of any adjustments to be noticed.

Ours uses a lot less energy by running it long and low, controlled by the weather compensation than it does when under the control of a room stat and timer as it idles rather than kicking on and off. However that is probably predicated on our lifestyle as we are at home all day so the house temp doesn't vary much except for reducing the flow temp by a couple of degrees overnight.

QrizB

Reed_Richards said:

What is the white cylinder top right "...ukin"?  I thought it might be a buffer but it doesn't seem to have enough connections.

The brand is Daikin and I think the silver label says "volumiser"?

Mstty

@matt_drummer looks like a neat install.

Were the installers local or Octopus branded?

matt_drummer

Reed_Richards said:

What is the white cylinder top right "...ukin"?  I thought it might be a buffer but it doesn't seem to have enough connections.

There is no buffer tank.

It is a volumiser, it just makes sure that there is enough water to satisfy the flow demands of the heat pump. It is on the return side.

It is a World Heat inline volumiser. 20 litre capacity with 35mm insulation and it flows up to 60 litres a minute.

It is made in Manchester and has a Dailin sticker on it.

matt_drummer

Mstty said:

@matt_drummer looks like a neat install.

Were the installers local or Octopus branded?

I think it's pretty neat.

It's quite a tight space although it looked much tighter than it actually was with the old system. Of course, I knew it would be big enough

The installers were all Octopus employees. The lead installer was from Gloucester and had five nights in a local hotel.

The other three were from within around a 50 mile radius of here.