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There’s a few different seals here: https://upvcspares4repairs.co.uk/upvc-window-hardware-spare-part-replacement.html?cat=392
Heat Pumps: anyone have one/thought about it?
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The short answer is no. The longer answer is it entirely depends on your individual property, the heat loss and the flow rate requirements.
Get a survey done if you are interested.
Soldato
Same with mines
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Has anyone had an install done by octopus? they are quoting 1.5k for this:
- Includes £7500 off from the Boiler Upgrade Scheme
- Including VAT and boiler upgrade scheme discount
- Any necessary plumbing and electrical work
- Labour and workmanship
- Daikin compatible water cylinder
- Any necessary new radiators and upgrades
- Daikin heat pump expertly configured for your home
Soldato
Good deal
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Installs currently sitting around next June if you book a survey now (and the survey may be November / December depending on your area)
Soldato
That's a long wait....
Cant you just privately hire a pro plumber/heat pump engineer, get a quote and then get the grant off of the government?
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Soldato
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Finally got our Mitsubishi Ecodan 11.2kw heat pump up and running on Friday, this is paired with one of the Mitsubishi FTC6 specced cylinders.
Too early to give a fair and honest review, but initial impressions are good - finding the perfect equilabrim will be the tricky part so we run a constant low flow, rather than a heat/cool/heat/cool cycle which is poor for efficiency.
Too early to give a fair and honest review, but initial impressions are good - finding the perfect equilabrim will be the tricky part so we run a constant low flow, rather than a heat/cool/heat/cool cycle which is poor for efficiency.
Soldato
Thats quite a meaty beast. Do you have a particularly large house, or high heat loss?
Soldato
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I don't believe we have either, but I'm too dumb to do the heat loss calcs myself! That being said, I'm less than impressed by the installers so it really wouldn't surprise me if it were too powerful for the house makeup.
We're in a 3 bed cavity built bungalow, so I assume by default we lose more heat by having larger roof space?
Floor was insulated with at minimum 50mm PIR insulation, 100mm in other places due to discrepancies in the floor height buildup, UFH then installed to the insulation with 50mm screed on top, so a decent thermal mass for low/slow running.
We've 300mm loft insulation throughout, with the exception of the kitchen diner which has a vaulted ceiling but there's 100mm celotex in the rafters. External wall insulation too, and brand new aluminium windows/doors throughout.
Edit: I hope its over specced, as mentioned less than impressed with the suppliers/installers so if it is too beefy then we've got an even stronger leg to stand on in our disgruntlement with them.
Edit 2: Warmup UFH document showed this, assume that means we need 10.9kw in?
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But then it's not installed by octopus. Am I missing something?
Soldato
I don't believe we have either, but I'm too dumb to do the heat loss calcs myself! That being said, I'm less than impressed by the installers so it really wouldn't surprise me if it were too powerful for the house makeup.
We're in a 3 bed cavity built bungalow, so I assume by default we lose more heat by having larger roof space?
Floor was insulated with at minimum 50mm PIR insulation, 100mm in other places due to discrepancies in the floor height buildup, UFH then installed to the insulation with 50mm screed on top, so a decent thermal mass for low/slow running.
We've 300mm loft insulation throughout, with the exception of the kitchen diner which has a vaulted ceiling but there's 100mm celotex in the rafters. External wall insulation too, and brand new aluminium windows/doors throughout.
Edit: I hope its over specced, as mentioned less than impressed with the suppliers/installers so if it is too beefy then we've got an even stronger leg to stand on in our disgruntlement with them.
Edit 2: Warmup UFH document showed this, assume that means we need 10.9kw in?
No idea at all.
Most people are getting quotes for gas boiler to rad replacement so the size may vary, although I would have thought the delivery mechanism would be kind of irrelevant.
If you have the potential to add 11kwh you have the potential to add 11kwh. Underfloor tends to feel less immediate I believe since you heat the area and that then heats the room.
Do you have smart meters, if so your gas (assuming you had gas heating before) would tell you the amount of energy you added to your home on a typical day say Jan-Feb.
It shouldnt make such difference if thats delivered by any mechanism, the heat added will all eventually escape. The main issue with heat pumps is if you have a poorly insulated house (which yours doesnt sound like) you may not be able to add enough kwh of energy in with a heat pump, and or you may bankrupt yourself trying
Where as gas boilers will often be able to deliver 20kwh+ quickly, so its fine to let your inefficient get cold then warm it up quickly, a heatpump in an inefficient house may take hours to get to the target temps.
Soldato
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Unfortunately I've got nothing whatsoever to compare to, the house underwent extensive renovations, which included tearing out the old oil boiler and conventional rads. Then adding the floor insulation, UFH and screeding - fortunately we had enough ceiling height to make it feasible!
Soldato
So?
Your main goal is to get a heat pump. Octopus are not the only set of engineers that can install it.
Just like British gas is not the only company that can install a new gas boiler
Soldato
Thing is Octopus (claim) that they are cheaper 90% of time
Associate
That ufh document just seems to be showing how insulated your surfaces are.I don't believe we have either, but I'm too dumb to do the heat loss calcs myself! That being said, I'm less than impressed by the installers so it really wouldn't surprise me if it were too powerful for the house makeup.
We're in a 3 bed cavity built bungalow, so I assume by default we lose more heat by having larger roof space?
Floor was insulated with at minimum 50mm PIR insulation, 100mm in other places due to discrepancies in the floor height buildup, UFH then installed to the insulation with 50mm screed on top, so a decent thermal mass for low/slow running.
We've 300mm loft insulation throughout, with the exception of the kitchen diner which has a vaulted ceiling but there's 100mm celotex in the rafters. External wall insulation too, and brand new aluminium windows/doors throughout.
Edit: I hope its over specced, as mentioned less than impressed with the suppliers/installers so if it is too beefy then we've got an even stronger leg to stand on in our disgruntlement with them.
Edit 2: Warmup UFH document showed this, assume that means we need 10.9kw in?
The installers should have done, and given you a copy of, a full heat loss calculation. The loss calculation will include volume of each space in the house, R value of each exterior wall and ceiling, plus known drafts extractors, or chimneys. With that they can calculate the heat required to reach a target temperature, flow temps needed, predict efficiency of the heat pump, and estimate running costs.
Are the installers MCS certified?
From your description of the house and insulation and comparing it to our house and heat pump, it sounds like 11kw ASHP could be overkill.
As well as being more expensive to install Having an over specced ASHP (I think) costs more to run than an optimally specced pump.
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Filling in a heat loss calculation spreadsheet is pretty easy, just takes time and you need all the data. But if you've just renovated your house you should have most of the room dimensions and maybe insulation details to hand.
Soldato
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This was/is a bone of contention with the installer......
Their quotation stated;
So this was queried
Given their below response, in hindsight, I should have pulled the plug on the deal completely - but is grounds to also get them in hot water and potentially get remediated heat pump sorted FOC if there is an issue in over speccing (we've not paid up front, we still owe 40% of the bill)
I'll need to work out heat loss and see whether they did perform heat loss calcs accurately, as they were provided all details required to be able to perform it themselves.
Soldato
I think most of us consider MCS a simple racket
Priority of 1) themselves, 2) the installers (the hand that feeds them), 3) the consumer
Certainly I see some solar installers saying MCS is a bit of a joke.
My suspicion is Octopus think the same considering how they now moving to not requiring MCS certification.
Octopus now moving to being an installer themselves means the would be under direction of MCS and I suspect they see how little benefit that is for consumers and installers really.
Priority of 1) themselves, 2) the installers (the hand that feeds them), 3) the consumer
Certainly I see some solar installers saying MCS is a bit of a joke.
My suspicion is Octopus think the same considering how they now moving to not requiring MCS certification.
Octopus now moving to being an installer themselves means the would be under direction of MCS and I suspect they see how little benefit that is for consumers and installers really.
Soldato
I just had a quote for the current Daikin unit for a 2 bed mid-terrace of ~£2600
However they are launching the Cosy 6 unit in December so I'm waiting for that as it's supposed to be a lot cheaper (and much higher temp capability) so you may be approaching zero cost which Octopus themselves state is a possibility with some installations.