Originally Posted by jdr (Post 8132430)

But how much water is generated by burning gas ? ;-)

Originally Posted by jackytoo (Post 8132635)

I am in the UK until Xmas .

Originally Posted by jackytoo (Post 8132635)

Even if you do have a decent heating system in Spain it is expensive to run. The heat does not stay in the house long and to keep a decent temperature the system needs to be constantly churning out a full blast.

Originally Posted by missile (Post 8132850)

I never said burning gas would not produce water vapour.::p Schoolboy chemistry will tell you that burning any hydrocarbon will produce carbon dioxide and water. Higher chemistry will tell you inefficient burning produces CO and the relative calorific values for specific fuels. :rofl:

If you are really interested:rolleyes:, you could calculate how much vapour is given off by each fuel in relation to the heat generated. :wub:

Originally Posted by playamonte (Post 8131225)

I often wonder why many do not fit Central Heating ?
Typical Spanish villa/house has an under-build (correct) so this makes for a very easy installation as you drill straight down to take the pipes into the under-build & run them all along the ceiling below.
Fuel can be either Gasoilo "B" (as we use) or Repsol Gas who will supply a storage tank, this will keep the ambient temp the same in all rooms & supply hot water as well, thus avoiding the room with the log burner being like an oven & the rest of the rooms freezing.
We use about 500 litres over the winter & a little more if we have Friends/family staying downstairs & the current price for "B" is about 68c per litre, gas is about 60c a litre.

Yes I know the other typical type are single story with thick walls, but still not impossible to do (IMO)

Originally Posted by scampicat (Post 8135427)

The only viable 'central' heating for us ......

Originally Posted by missile (Post 8136026)

If you really want central heating, you could use double bottled gas cylinders. A small cylinder lasts circa month on my gas fire. To run central heating and water you would need one fairly frequently, which might be inconvenient:frown:
Those large orange bottles should last quite a while.:thumbsup:

Originally Posted by mickcarol (Post 8131384)

For the past few years here in Spain we have been using convector heaters turned down to the lowest setting, and kept on 24hrs a day.
After about a week, the house feels quite warm. We found that using other types of heaters, and turning them off at night, the following day,
it takes a few hours to warm up again, thus,wasting electricity.

Originally Posted by beryl1914 (Post 8435107)

I was thinking of doing the same but what was your bill like?:wub:

Originally Posted by bil (Post 8437172)

The weight of water from those gas cylinders is truly horrifying.

C4H10 is the formula for butane, that 'weighs' 4 x 12 = 48 for the carbon and 10 x 1 for the hydrogen, so the 'weight ' of butane is 58.

It produces 5 molecules of water, 5H2O H2O weighs 18, so 5 x that is 90.

Every 58g of butane therefore produces 90g of water.

Liquid and solid fuels (except charcoal) can crudely be described as repeating CH2 units, so their weight to water ratio is about 14 to 18, roughly parity, so a ton of bone dry wood will produce roughly a ton of water.

All carbon based fuels UNLESS CATALYSED with always produce a eutectic mix of carbon, carbon monoxide and carbon dioxide. The aim of all burning systems is to be so efficient as to force the eutectic mix into maximising the % of CO2 produced.

Originally Posted by jdr (Post 8438658)

Glad you posted that, I used to have all the contents etc in my Corgi books but they are long gone, I thought it was around twice as much water. :thumbup: