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 Post subject: Air to Air and UFH?
PostPosted: Mon Oct 16, 2017 10:02 am 
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In the new house we have a choice of heating systems, we can have a Pellet boiler semi self feed, we can have a Condensing gas boiler, or we can have Air to Air heat pumps. As we have a gas tank already buried, "unused" I said that we would have the G/C boiler, however I am having second thoughts, I don't want the Pellet boiler, so it could be the Air to Air, its a bungalow of 180M2 apart from one bedroom all the floors will be tiled and its all UFH, both the normal thing here in France, the fly in the ointment, is what will the temperature be inside the house if its minus 20 outside? before the first house burnt down we had a reversible DC inverter air con unit, in the winter it stopped working at about 3/4 Degrees, the architect and project manager have told us that they use a better system, so what are your views on Air To Air pumps, thanks Nos.


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 Post subject: Re: Air to Air and UFH?
PostPosted: Mon Oct 16, 2017 12:22 pm 
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Certainly the UFH in a screeded floor is the way to go, so the biggest consideration after that is the heat source. This would really be determined by fuel costs, so Leccy Tariff & LPG costs.
An air to air unit, while great, will only blow air into your home when it's off - no heat!!
With UFH in a screed will be heating a thermal mass & if there's any problems, you'll still have heat for at least a day.

Again, depending where you live in France & its climate, the air to air can offer AC also.

For me; I'd always fit UFH, I can change the heat source easily & know it's the best bang for my buck heating system. I'd also supplement any system with a multi-fuel stove, I can through anything into it to get heat.

As for pellet burners, a lot of Tree Huggers fitted these, really struggle for a fuel supplier & questionable quality. Of course this may not be the case in France.
Good luck & I hope that helps :thumbright:

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 Post subject: Re: Air to Air and UFH?
PostPosted: Tue Oct 17, 2017 7:43 am 
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Sorry Dickie I meant an Air to Air heat pump, not blown air, im worried about it not working when the temperature drops. Nos


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 Post subject: Re: Air to Air and UFH?
PostPosted: Tue Oct 17, 2017 8:11 pm 
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Nos wrote:
Sorry Dickie I meant an Air to Air heat pump, not blown air, im worried about it not working when the temperature drops. Nos


Air to air is either a Split Unit or ducted. Air Source Heat Pumps are gererally heating water via a SS plate heat exchanger. Another consideration is a geothermal heat pump, you'd roughly need land about double the size of your house area - so 360m2 for that system.

If you're fairly rural & it's permitted, a multi-fuel stove is great for supplementing any heating system. So you'd use your stove when temperatures drop :thumbright:

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I'm not or never claimed to be Chris Williams.


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