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Aga hot water
 Started by  clovercott
 27 Sep 2009, 7:44 PM


Hello I am building a solid fuel aga for use in a cottage in Ireland, I have purchased two old aga cookers and have used the best bits to make the one I will use. However I have two boilers, one the 90 gallon and the second the 135 gallon but am uncertain which one to use. The larger boiler will obviously generate more water but will this be at the expense of robbing heat from the oven, your comments would be appreciated

tony
Those type of cookers are one of the least efficient ways of making hot water -- they do keep you nice and warm though.
 
Why not make a solar panel?
 
clovercott
I dont have much experience of solar heating, the impression I have is that when I want the water nice and hot in the winter there is little sun. Are things more advanced now?
 
clovercott
Just been doing some homework on solar panels, the Royal institute of charered surveyors say it takes about 100 years to recoup the cost of the solar panels. I would probable sleep better in my bed having spent 5.00 in a bag of coke to heat my water than waiting for my big splash out on solar panels to amortize.
 
fridihem
The RICS are just kidding you on a bit, check out this website, very interesting.
http://www.yoursolarpowerhome.com/index-how.html
 
Even here in Northerly Sweden, they are saying that payback time is around 8 years
 
Julian
Consider that, once you have paid for your AGA you will then be able to start paying for fuel for it. This will only ever get more expensive. Once you have installed solar thermal you will pretty much stop paying for hot water. It could conceivably produce 70% of your hot water needs.
 
100 years payback is nonsense. The capital cost of heating equipment is a consideration. But 'payback' is something we only talk about in respect of renewable energy systems. Do you expect a 'payback' on the AGA?
 
Wyland
Yes, I'd agree that a solar thermal system could be just what is needed. It would be able to provide most of your hot water needs during the warmer months.
 
These systems generally come in two types - flat plate collectors and evacuated vacuum tube collectors. The latter is more sophisticated in that the tubes reduce conducted heat losses, allowing them to reach considerably higher temperatures. Also, the curved surface enables the collector to compensate for changes in the angle of the sun. Look around for a well-established, reliable system. One example is the LaZer2 system produced in the UK by SolarUK -see SolarUK's website at http://www.solaruk.com for details. What's more, it'll work in cloudy conditions, not needing direct sunlight, and is very suitable for the UK/Irish climate.
 

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