Leschenauds Posted April 10, 2005 Share Posted April 10, 2005 I am putting in a central heating system and the only bit I have yet to get is the oil fired boiler. I have looked around and was ready to purchase when I was offered one from a large house which is being refurbished. The boiler is in excellent condition with regular service records and a new burner and control system, the former still boxed however. The boiler is bigger than I was proposing to buy with something like 2 to 3 times the rated output. The boiler itself is built from 5 and 7mm plate steel and much more substantial than those I have been contemplating.The question is, is it as I suspect reasonable to use an overrated boiler which will, one presumes, just run for shorter periods to achieve and maintain the required heat level. I would be saving a considerable sum and would appreciate any comments on the pros and cons. Link to comment Share on other sites More sharing options...
johnjones Posted April 10, 2005 Share Posted April 10, 2005 [quote]I am putting in a central heating system and the only bit I have yet to get is the oil fired boiler. I have looked around and was ready to purchase when I was offered one from a large house which is b...[/quote]The most economical boiler is one which is working close to its rated ouput, ie around 85% of its rating. One with too much capacity will never achieve its maximum efficiency due to the constant fire up/cool down cycle and will thus cost you more to run. Link to comment Share on other sites More sharing options...
Nick Trollope Posted April 10, 2005 Share Posted April 10, 2005 [quote]The most economical boiler is one which is working close to its rated ouput, ie around 85% of its rating. One with too much capacity will never achieve its maximum efficiency due to the constant fire...[/quote]The most economical boiler is one which is working close to its rated ouputQuite right, but a few hundred Euro's could buy a years worth of oil. However, bear in mind that the bigger the burner, the noisier it will be (and boy, are they noisy - you can stand in the middle of our village on a cold winters evening & it is like being at Heathrow). Also, the older the boiler, the less efficient anyway.Oil is getting more & more costly, so the savings may not be so valuable. And, using an inefficient boiler will do nothing for your Green credentials! Link to comment Share on other sites More sharing options...
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