Good explanation thanks. It would be even better, if you could summarise with a table showing heat pumps in column 1 and then a column with a score for each evaluation criterion - as you see in Which/ magazine for example.
I have a split system Daikin Altherma 3HT ASHP. External fan & internal hydrobox. This is NOT connected by refrigerant as your intro suggests. I think you should consider manufacturing location, spares access & warranty support when considering. I have a fixed price 10 year warranty & service package. SCOP >4
In this set up the Daikin does connect inside to outside via water. In that respect it's more of a hybrid monobloc/split which we touched on in some of the other model descriptions. Did you get a Daikin because you live in an older property?
I don’t like how choosing a heat pump is kept so opaque, I don’t understand how choosing something that effectively is a fridge in reverse can be shrouded in dark arts and marketing. What a consumer needs to know is cost, reliability, suitability and most importantly to be able to compare the relative cost of heating your house. I’m midst making the choice but it’s a nightmare as I can’t tell if it is going to cheaper or more expensive to run than my gas boiler, no idea whatsoever.
A couple of key points in our circumstances have turned out to be insulation top to bottom as we were able to do a total refurb , this lead to a vast amount of capital being spent on roof felt insulation, wall insulation , floor insulation a new slab with underfloor heating , first and second floor with K3 radiators , so really anywhere you can think of insulation it was applied , inc triple glaze . I mention all this because when it came to running the pumps I discovered that I could operate with a 25 degree flow for 7 hours on cheap rate at night and enough heat was generated in the house to keep it warm for the next 17 hours . A 450 sq mtr area is being heated and hot water provided for £3.70 a day , that’s just unit rate no account of standing charge or VAT . I only had two zones , all underfloor on one all radiators on the other . It was not my intention to run it like this , the installer obviously had in mind for it to run in the usual fashion , if I allowed that as I did at the start either using compensation curve or constant flow rate it would have bankrupted me , and certainly cost substantially more than our oil boiler . It proves how vital the accuracy of the heat loss calculation is , our installer could not be accurate to be fair as there were to many unknowns , it’s essential to get them to be thorough with assessment and if it’s done quickly then show them the door . If I accounted for all the costs it would make no sense financially, so be honest with yourself about your situation in terms of heat retention . I have a friend of my wife’s who has had it installed in a wooden property , clearly to my mind that should never have happened the heat loss is too great and she can not get it warm enough and to get the heat she has is going to cost her substantially more than her previous system . Look up and see if there is a heat geek elite installer in your area.
@@pmb9172I checked and there wasn’t. My problem is that using a rule of thumb area based calculation of 5kW per 100m2 I get 15kW needed, but we are very frugal and gas usage is only 10,000kW so 10,000/2900= about 3.5kW. So 15 vs 3.5, that’s a crazy deviation.
That would depend on how far the outside unit is from the house. With a split system you can go up to around 50M from the home. However there are some other stipulations about where you can place the outside unit (space around etc). We have some more information on our site about this.
@@juliandclarke we recommend the Nibe for smaller properties on the basis of it being compact. If SCOP is the most important thing for you there are probably better heat pumps out there.
There a so many holes in this review, it is annoying
Good explanation thanks. It would be even better, if you could summarise with a table showing heat pumps in column 1 and then a column with a score for each evaluation criterion - as you see in Which/ magazine for example.
I have a split system Daikin Altherma 3HT ASHP. External fan & internal hydrobox. This is NOT connected by refrigerant as your intro suggests. I think you should consider manufacturing location, spares access & warranty support when considering. I have a fixed price 10 year warranty & service package. SCOP >4
In this set up the Daikin does connect inside to outside via water. In that respect it's more of a hybrid monobloc/split which we touched on in some of the other model descriptions. Did you get a Daikin because you live in an older property?
Not sure when you had yours installed but mine is connected by 410a gas and is a 2013 Ashp.
I don’t like how choosing a heat pump is kept so opaque, I don’t understand how choosing something that effectively is a fridge in reverse can be shrouded in dark arts and marketing. What a consumer needs to know is cost, reliability, suitability and most importantly to be able to compare the relative cost of heating your house. I’m midst making the choice but it’s a nightmare as I can’t tell if it is going to cheaper or more expensive to run than my gas boiler, no idea whatsoever.
A couple of key points in our circumstances have turned out to be insulation top to bottom as we were able to do a total refurb , this lead to a vast amount of capital being spent on roof felt insulation, wall insulation , floor insulation a new slab with underfloor heating , first and second floor with K3 radiators , so really anywhere you can think of insulation it was applied , inc triple glaze .
I mention all this because when it came to running the pumps I discovered that I could operate with a 25 degree flow for 7 hours on cheap rate at night and enough heat was generated in the house to keep it warm for the next 17 hours . A 450 sq mtr area is being heated and hot water provided for £3.70 a day , that’s just unit rate no account of standing charge or VAT .
I only had two zones , all underfloor on one all radiators on the other .
It was not my intention to run it like this , the installer obviously had in mind for it to run in the usual fashion , if I allowed that as I did at the start either using compensation curve or constant flow rate it would have bankrupted me , and certainly cost substantially more than our oil boiler .
It proves how vital the accuracy of the heat loss calculation is , our installer could not be accurate to be fair as there were to many unknowns , it’s essential to get them to be thorough with assessment and if it’s done quickly then show them the door .
If I accounted for all the costs it would make no sense financially, so be honest with yourself about your situation in terms of heat retention .
I have a friend of my wife’s who has had it installed in a wooden property , clearly to my mind that should never have happened the heat loss is too great and she can not get it warm enough and to get the heat she has is going to cost her substantially more than her previous system .
Look up and see if there is a heat geek elite installer in your area.
@@pmb9172I checked and there wasn’t.
My problem is that using a rule of thumb area based calculation of 5kW per 100m2 I get 15kW needed, but we are very frugal and gas usage is only 10,000kW so 10,000/2900= about 3.5kW. So 15 vs 3.5, that’s a crazy deviation.
Hi,
When you say a indoor unit, can they be sited in a garage with the outside unit the other side of the wall and then the pipes run to the house,
That would depend on how far the outside unit is from the house. With a split system you can go up to around 50M from the home. However there are some other stipulations about where you can place the outside unit (space around etc). We have some more information on our site about this.
@@WeLoveHeatPumps
Cheers. Its only 2.5 metres from the house, Ill check out your site for more information
Can you tell me if the Nibe will work at higher temperatures?
The Nibe 2050 isn't a 'high temp' heat pump per se, but it will work at quite a high flow temp for a heat pump (max 58°C)
I looked at Nibe. Called the Rolls-Royce of ASHPs. But I couldn’t find any scientific evidence of better SCOP or warranty. So it was a no for me.
@@juliandclarke customer support is awful too. Dodged a bullet IMO 👍
@@juliandclarke we recommend the Nibe for smaller properties on the basis of it being compact. If SCOP is the most important thing for you there are probably better heat pumps out there.
2005?
haha well spotted. This one slipped through the net.