Going Green isn’t easy

[Sam Vimes]

This debate seems to be going around in circles and getting a little personal.

I'll not lock it yet but my summary is....

Heat pump related equipment is good for some and not others. Just because of one or two of your own experiences, good or bad, does not mean the technology is bad or good in general.

 

[Oscarmax]

We are fortunate our 2 bedroom bungalow was built in 2017, over a 12 hour period in the current cold weather we lose 3 degrees C, this morning to heat up from 19 degrees C back up to 22 degrees C just our 1 hour hour.

When we refurbish the kitchen we will change the Ideal combi to a Bosch and the tumble dryer (which is every other day 365 days a year) to an AEG 9 kg heat pump dyer (as there are no heating element run it off peak rate overnight)

 

[GUMPY]

Would be interesting to know how hard the boiler is running to do that. On our system, gas boiler with weather compensation, it takes about an hour per degree to heat the house from 16 to 18.5* on these cold mornings. However it's a 15kW boiler but apart from when it's heating the hot water when it gets to 11kW (flow temp 80deg) it rarely runs above 5kW due to the lower flow temperature (40-55 Deg C) for the heating.

I'm still experimenting to find the most economical way of running it, so far it seems to be maintaining an even temperature all day, even if we are out, rather than heating and cooling the house.



* Thermostat/timer is in the hall which is a 1-2 degrees colder than the rest of the living area.

 

[otherclive]

We are fortunate our 2 bedroom bungalow was built in 2017, over a 12 hour period in the current cold weather we lose 3 degrees C, this morning to heat up from 19 degrees C back up to 22 degrees C just our 1 hour hour.

When we refurbish the kitchen we will change the Ideal combi to a Bosch and the tumble dryer (which is every other day 365 days a year) to an AEG 9 kg heat pump dyer (as there are no heating element run it off peak rate overnight)

That’s similar to our temperature drop overnight last Tuesday until mid day Wednesday and the overnight outside temperature was minus 2 deg C. Post #194 shows the cooling and heating curve.

 

[Dustydog]

Our four year old Vaillant Eco gas boiler is A rated allegedly reaching 94% efficiency .

Do you think it is cheaper to keep the house at a low of say 15 degs C overnight warming it up to say 19 degs when occupied?
Or let the temperature drop with the weather and then warm up?