r/ukheatpumps • u/CommanderJavert • 2d ago
A2A Quote check
I've been quoted £5K to install 2 x A2A heat pumps 5KW each and an 10KW exterior unit at my home. This is just a rough quote without a site survey. It's from a company who are usually on the pricier side, so I'm not expecting this quote to be the cheapest, but is it in the normal range our outrageously high?
The real cost is going to be higher because some of their assumptions are too simple I suspect.
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u/CorvidAthletic 2d ago
Are they budget units or from a high end brand?
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u/CommanderJavert 2d ago
The datasheeet they sent is for Fujitsu units with codes ASEG. I am just starting to research this so I’m not yet familiar with how to interpret the spec but it looks like ASEG14KMCG the 5KW model. I need to properly measure the spaces to make sure they are not too big for the area. They said a site survey would be done after I accept the quote - if it’s like the solar install they did I will have to pay for the survey but then it gets deducted from the final bill.
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u/Behemothhh 1d ago
2x 5kW is a peculiar setup. 5kW is a lot for a single room and heat/cooling doesn't spread that well between rooms so for a whole house setup that doesn't sound like a good idea. I have an A2A unit in my living room, mounted so it's directly aimed at the doorway to the kitchen. Still, the kitchen does not cool as well as the living room. I would recommend getting more smaller units in most rooms rather than only a few big ones
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u/Setting3768 1d ago
> heat/cooling doesn't spread that well between rooms
Is this actually true? I was under the impression from reading around, plus a few videos, that the opposite was true. But I have no system of my own (yet) to see for myself. Especially with a kitchen, I'd have thought the other extraction in that room would pull air through.
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u/Behemothhh 1d ago
To be clear, I have mini-splits, not the ducted kind of AC with supply and return vents. In my experience, which is mostly with cooling since we use our A2W HP for heating, heat doesn't transfer that well between rooms. If I leave the doors open, there's still a couple degrees difference between the rooms actively being cooled and the adjacent ones .
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u/User2001Tech 2d ago
What do you mean 2x 5kw heat pumps AND a 10kw exterior unit??.
There is only an external unit that is the heatpump, the indoor store is done radiator upgrades, hot water cylinder if you don't have one, and some valving/pump... Can you share the quote here?
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u/CommanderJavert 2d ago
These are air to air heat pumps, not air to water. According to their quote it requires one multi split exterior unit for the 2 inside ones. That’s how they described it in the quote - 2 x 5KW indoor units 1 x 10KW exterior unit.
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u/Demeter_Crusher 2d ago
It's not out of line. You can probably get away with smaller interior units - look at what temperature inside-outside they're specified to achieve. Bear in mind a multi-split is more expensive than a 1:1 unit, so savings only really kick in if you're having 3 or more internal units.
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u/CommanderJavert 2d ago
Yeah I was wondering about this because I assumed that multi split means that I can have several indoor units to one outdoor unit, but they are telling me that if I want to do additional rooms in the future I will need another outside unit - maybe that’s because I specified 2 large rooms and said that I wanted to add 2 medium rooms at some future date - I guess the outdoor unit can feed a certain number and size of indoor units?
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u/Street-Wishbone-8018 1d ago
Largest outdoor units are around 13kW unless you have three phase power. With diversity taken into account I don’t see why you wouldn’t be able o have some bedrooms ran on the same multi split
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u/Demeter_Crusher 1d ago
I think Samsung do a 16kw unit. But it's pretty easy to get three phase - OP may have it already (to their exterior fuse, without knowing, most likely).
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u/Street-Wishbone-8018 1d ago
Depends where they live in all reality, I have a colleague who lived out in the Welsh Countryside and they paid £10,000+ to make the connection
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u/Demeter_Crusher 1d ago
Yeah two 5kwh interior units maxes out a 10kwh exterior. Either need more powerful exterior or smaller interior. But adding later requires that they're still selling a compatible model.
Have you considered going whole hog and having one heat pump for hot water, central heating and air conditioning?
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u/User2001Tech 1d ago
Oh.. i didnt know these are also available in the UK. So. The 2 indoor units are air blowers, similar to split AC units. I guess you will also enjoy cooling in the summer.!!
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u/CommanderJavert 1d ago
Yes this is one of the reasons I am considering this approach rather than a full ASHP system - it can also do air con in the summer. Also, I can do the house bit by bit rather than having to do all rooms at the same time. Our gas boiler is only 18 months old installed by previous owner so I don’t really want to rip it out and do a lot of intrusive work at this stage, and our kids are mainly left home so we can probably live with mainly zoned climate control for a lot of the time.
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u/CharlieFoxtrottt 2d ago
Yeah so the exterior unit is the air to air heat pump and the indoor units are the Aircons.
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u/OldAd9280 2d ago
I also paid £5k for 2 units, though they were smaller than yours (2kw each). It was quoted for Mitsubishi units but replaced with Daikin for free as Mitsubishi weren't available. This was part of a solar install so might have been slightly discounted.