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floor heating ?

Discussion forum for expats moving to or living in Portugal.
Subforums: Property for Sale/Rent, 2nd Hand Items for Sale/Wanted, Job Vacancies/Employment Wanted

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Re: floor heating ?

Post Posted: Tue Aug 07, 2007 8:23 pm

Does geothermal heating exist in portugal? Perhaps it would expensive to install but I'm attracted to the carbon friendly quality of it. Anyone? Northerners perhaps?


Regular Poster
Regular Poster
Re: floor heating ?

Post Posted: Tue Aug 07, 2007 8:54 pm

Yes - look at Wikipedia though this is talking about the Azores. A company worth talking to is FFSolar or possibly Novambiente (Christian Oster). I have talked to both (they speak english) about alternative energy sources for electricity.


Rod S


Forum Leader - Portugal
Forum Leader - Portugal
Re: floor heating ?

Post Posted: Wed Aug 08, 2007 1:19 pm

I renewed a floor last October and put electric underfloor heating in. It is fabulous and cost less than the two 12x18 inch heatwafers I had. I'm thrilled with it. I wouldn't be without a good woodburning stove either, though.


Re: floor heating ?

Post Posted: Thu Oct 05, 2017 5:02 pm

Reviving a necro thread, as some may find it interesting...

I'm (still) building in the Azores. Long story short, having to go for a re-design - smaller - as building quotes came in too high, so back to the drawing board.

I'm installing underfloor electric heating: Despite Faial not getting really bellow 12 degrees at its coolest, the idea is to make the place cosy when it does go there, and to keep the damp off, as there is typically high humidity.
Installation is not too expensive, cheap to run, green - possibly looking at solar PV in the future, and can be easily wired to run off a smart house system using the correct sensors and timers etc.
No boiler maintenance to consider Smile

I'm also going for one of the flue-less electric real look fires that have popped up over the last couple of years. Amazing...they look great and provide a focal point as well as being efficient, as no heat goes up a flue and hot air is pushed out the bottom. Super low maintenance is also important to me, so no cleaning ashes etc etc.... They fit either direct onto the wall or can be made flush mount, and just need a 13amp outlet.

I like the idea of the wafer heaters for the dressing room - I'll probably grab a couple of these. Also planned is an electric towel rail, again run off the smart house system. Toasty.

Ventilation is important, and I've done my homework here and have 5 large skylights that can be automatically or remotely opened by the smart house - whilst open the heating is shut off for obvious reasons. So a combination of gentle heat and good ventilation is provided in cooler months, ventilation provided during dry summer periods (rain sensors shut the skylights)...

Now to get the new planning permission (first one was no problem and this place is smaller, so fingers crossed!).... good job I'm not in a rush Smile


Re: floor heating ?

Post Posted: Thu Oct 05, 2017 7:30 pm

I would urge you to consider running water tubes under there instead of electric resistance wires; because then you [or future occupants] can use any heat source.
Electric can be used at night rate [you would need a buffer tank], or firewood, or pellets, or direct solar, or whatever else comes along in future.

PV panels connected to electric resistance heaters? with batteries?? Not green at all.


Forum Legend
Forum Legend
Re: floor heating ?

Post Posted: Thu Oct 05, 2017 8:17 pm

Hi Liveaboard -

I did consider using a wet under-floor system - but all gas (bottles or bulk) have to be imported to the island, whereas electricity is mostly generated on the island by wind and solar. So this is pretty green. (There is an oil fired generator on the island, but only used as a top up or in emergencies, so I'm informed). Consumers burning wood or pellets or oil on the island is not sustainable. Unless of course we want to end up looking like Easter Island! LOL

I was only considering my own PV for further cost reduction... but yes, I understand your point here. Batteries are not at all green.

Best, Steve


Re: floor heating ?

Post Posted: Thu Oct 05, 2017 11:12 pm

I would second Liveaboard's proposal. We have (sadly only partial) wet underfloor heating supplied from a thermal store, currently heated by solar (thermal) panels and/or (off-peak) electricity but the obvious future enhancements would be an air-source heat pump and/or solar voltaic electricity.

I imagine that it could be possible to install both wet and dry underfloor systems to provide greater versatility.


Frequent Poster
Frequent Poster
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