Air to air heat pumps.

Am looking at the same,  someone said that daikin are bringing out a combined air to air and air to water one later this year. So heating/cooling and hot water in one unit. 

Heating and cooling in one unit is a heat pump if you want it to do hot water. 

if no hot water requirements it is air con.

Hi, 

Just on a side note with this, and it may or may not be of assistance.  But, if you have a Halifax mortgage or have recently moved to Halifax from another lender, or even renewed your rate with Halifax, they are offering a cash back for people who make their properties more energy efficient, e.g. Heatpump installed £2,000, Solar £1,000, other 'green' home improvements £500. 

It sounds too good to be true but there is absolutely no catch.  I am a mortgage broker of 20 + yrs and have contacted all clients who have a Halifax mortgage to make them aware, so far in the last 2 weeks, 3 clients have been paid out.  You upload the invoice to a particular Halifax 'green' portal and they review and send you the money within 5 days.  You do not pay it back, it is not a loan it is just, as they say, cash back. 

The reason.. lenders are under pressure from the Government to make homes more energy efficient so it is their way of trying to encourage.  Nationwide are offering 0%, YES, 0% borrowing to existing clients, again for 'green' improvments.

Stu

PS it is not a shout for business (although always happy to chat mortgages and bikes until the cows come home), it is something that you have to do directly with Halifax, although more than happy to guide you through it.  I have a flyer but it exceeds the MB, so if you DM me, ill send you the details.  You wont be added to a mailing list, Ill just simply send you the info.

Thankfully we are mortgage free but we save with Nationwide so that's great news.
Thanks

Posted by: stumoses

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Nationwide are offering 0%, YES, 0% borrowing to existing clients, again for 'green' improvments.

As a person with a Nationwide mortage this is interesting to know. Thanks.

As a brief overview...

£5k - £20K

0% fixed for 2 or 5 yrs

no fees

Funds must be used for energy efficient home improvements.  The small print...

• The term of the Green Additional Borrowing cannot be longer than the terms of your existing mortgage.
• The improvements you want to fund cannot make the property uninhabitable during installation.
• The borrowing can't be used retrospectively to re-finance or reimburse works that have already been completed on the property.
• The product can't be used for structural updates.

This is a good series on all things heat pumps. The guys in the video have air to air for heating and cooling, plus an air to water for hot water:

The bonus benefits of whole home AC

I have a 3 bed semi, 1930's ish. I fitted a fujitsu multi split heat pump with three ceiling units in the upstairs rooms. Mainly for the air con to help sleep on the two night summer we have every year. Two of the three rooms are occupied. I also knew I could use them for heating so trialled them last year. I kept the wet combi system running downstairs and only used the a2a upstairs. I liked it that much I ripped up my suspended floor in the living room and insulated underfloor properly and fitting 3 consoles downstairs off another multi split, a Toshiba this time. Running costs are comparable with gas boiler as far as I can tell at this stage. I wanted to fit a mixergy tank with heat pump too bu, at this stage, have been put off by the amount of water we use. we would nbeed to heat the tank twice a day, i'm using the gas combi for hot water duties still. I might get a couple of sunamps instead.

For context I also have 20kwh of battery storage, 3.6kw E/W solar on the roof and use a Kia EV4 and a SEAT Mii, both electric. I also make use of Octopus Intelligent Go. In particular, the three pin outlet on the Kia is utilised via a generator throw switch to power both heat pumps to fully maximise cheap rate electricity over the winter, charge at night, use during the day in the depths of winter. there was probably two weeks when the 20Kwh of house battery ran out.

Interesting, I've been thinking along the same lines for our 30s semi. It was reconfigured at some point and the combi boiler cupboard certainly wouldn't fit the tanks an a2w or mixergy type would need. Don't really want to lose a corner of the garage either. 

Sorting out the freezing cold suspended floor is on my list - was that insulating between joists or replacing the suspended floor entirely?

I had six or seven rotten joists, I replaced those.I then insulated heavily between the joists and went with a sheep wool high tog underlay beneath the carpet. I have space in the garage for the tanks or sunamps but we use a ridiculous amount of water daily, 750 litres ISH and the gas combi works so I've gone with that for now. If I didn't use so much I would probably have gone Daikin a2a with a tank or, with the benefit of hindsight,  one heat pump driving five indoor units and mixergy tank. When I fitted the Fujitsu initially I didn't realise how well the heating would work out, if I had I would have measured the whole house and run off one heat pump.

The video listed above is certainly worth a view

Mixergy cylinders only partial load hen heating with electricity they are also expensive. 

ASHP Jaga fan coils

Be careful with insulation that you don’t cause problems

I found this you tube video interesting

https://m.youtube.com/watch?v=mvmeRZpzC5k&pp=iggUQAFKEFljRTNzOFVYSXYzYUNROVI%3D

This one also helped, particularly for the under floor insulation

https://m.youtube.com/watch?v=2CvilBdkXMg&pp=0gcJCWQCo7VqN5tDiggUQAFKEDBSa1dlWjAyRVRXTUR1N2U%3D

I’ve been heating and cooling my house for 20 years with Air to air heat pumps (or as us aussies call them, air con) we live in cold climate at altitude. There are some differences between the units we have, and I’ve found that Dakin has by far the best cold weather performance, although most of the heavy lifting is currently done by a Hitachi. We have it teamed up with 20kw of solar and a g2 power wall, which gives us around 5 hours to avoid the evening peak in winter. Cold climate means high single figures during the day in winter, and up to minus 6 on clear spring nights. When it’s really cold, we also use the combustion heater which adds 50kw of heat, but 95% of the work is the air con. At sub 2 degrees efficiently and heating power take a nosedive due to anti frost cycling. I hasten to add though, this is just a regular system, not specifically designed for cold weather performance. Of note however, our hot water is also heat pump but co2 refrigerant and I’ve never seen it run an anti frost cycle. Our energy bill for heating, cooling (40 plus in summer) and transport (30,000 kms a year) is around 600 quid a year, mostly in supply charges. 

I've had air con in my house for a few years, works great although have never actually used it in heat mode (I figure it's more a useful backup in case the boiler for my central heating fails but haven't done the calculations, potentially it could be cheaper in some circumstances). I also still need to figure out if plug in solar now makes sense so it runs the a/c during the day (I haven't got a clue how much of the a/c power use it would cover and given I work from an office rather than home it might still not make a lot of sense in terms of years to pay back, I don't have anywhere convenient to site it either)