I'd be more interested in airsource systems if we actually knew the real cost of implementing them properly.
I assume its not just about the airsource system, proofing most older houses (mine for instance looks like a fairly modest, modern house, but was built late 60s with all the then acceptable, now not really suitable practices), supplementary heating ? upgrades to rads, solar panels ?
I assume there are many facets to it...and each facet is going to cost, is it affordable to the average householder ?
More than "it's not just about the airsource system"! It's not at all about the heat pump system. If you've got a leaky shoot house, it's going to cost you more no matter how you heat it. The only thing a heat pump adds to the problem is a slower heating response time which exposes that you've got a leaky shoot house by being more likely to fail to react fast enough... but blaming the heat pump for that is like saying a water tap is worse than a dung chute because you can't turn the water tap on fast enough to fill a sieve!
It's not affordable enough to the average householder yet. If it wasn't boiler replacement time, with a need to resite both boiler (the exhaust was melting the neighbour's guttering) and oil tank (too close to buildings for modern rules), even the government grants wouldn't have made it economic for us.
I suspect if you did it properly with a new build it's relatively easy and extremely efficient....on an older house ?
The best new builds should be easy (but even those get cocked up far too often, from what I read: cheap pumps installed badly and left on the factory settings, with no commissioning after the first owner moves in) but our house is a 40-year-old design. Retrofit was not as easy as it should be IMO but it's pretty efficient. Still nowhere near the extremely efficient ones with people reporting 700% efficiency on new-builds where I think they've got all the pipework as short and straight as possible, with the heat-pump indoor units in a ground floor room directly behind the ideally-positioned outdoor unit, powering underfloor heating mostly in neighbouring rooms.
There is certainly something in that, though I suspect it is as much about not trusting the "can predict when you'll get cold" bit to be at all accurate.
Would making manufacturers publish more of the control/prediction program, ideally in something graphical and easy to understand like Node-Red, help with that? Or do we just need more people to experience the better controls like ecodan and homely?
We can have differences of 25c over a day here. In the morning it can be 8c then by mid afternoon it can be 35c . Add wind and sideways hail the difference can be huge.
A constant temperature inside the house is difficult to achieve so with underfloor airsource heating it's constantly on off on off.
It should cope with 8 to 35 no problem, taking the edge off the morning chill and then using the hottest afternoon to heat enough water for the night.
I don't have underfloor but everything I've read tells me it should be more constantly on at low power than airsource radiators. If it was on off on off cycling a lot then it sounds like something was malfunctioning. In that situation, heating can eat a lot of money quickly and very few heating systems, whether electric, gas or oil, warn customers soon enough IMO. I guess at least with an oil tank, it can't keep wasting money beyond the tank running out, but that can still be hundreds of pounds!
Yes but when the sun comes in the window it ruins the sensor then open the back door and minus 5 blows in it causes the airsource to keep goin on and off.
This causes demand for the electricity thus costing alot.
Don't put the main heating sensors in direct sunlight or near a minus 5 draught!
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That'll waste your money no matter how you heat the home. What morons installed the sensors there? And was that where the surveyor recommended or did they ignore the survey?
Nearly every time someone grumbles about heat pumps, it seems to turn out that they had installation errors or were trying to use it as a boiler. Boiler's have got to go soon. We can't keep burning shoot for heat and transport, like that Fully Charged Show episode said.
(edited to fix a typo)