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Condenser boilers

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hopalong | 19:37 Thu 28th Sep 2006 | Home & Garden
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We are having a new condenser boiler installed. Do these need to be direct to an outside wall or is it safe to have it away from a outside wall with a 10 feet flue

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Your installer must be a registered CORGI or oil installer and he/she will know the answer to this, so you don't need to feel concerned. 10 feet does sound rather long, but it depends on whether its a powered flue, and the angles and bends required to the outside.
I have mine in the center of my bungalow with a 10 foot flue going straight up through the roof, fitted by a Corgi registered engineer.

No problem.
no problem, but remember you have a run off to a drain somewhere, as buildersmate says Corgi reg is a must. Cheers [email protected]
Hi hopalong,
I could give you more info if i knew what type of boiler you are having fitted ie system, combi, floor standing, wall mounted or and wether it is gas or oil fired ?
But in general these rules apply to most modern condensing boilers. The appliance is a room sealed, fan-flued boiler, consequently it does not require a permanent air vent for combustion air supply and may be installed in any room regardless if it is on an outside wall or not..
As for the flue length you can go upto 4.5m or if you prefer aprox 14ft 9in. In the horizontal position. 5.25m ( 17ft 4 ) if it is installed vertical & using a roof terminal. But you must remember that every 45degree bend is classed as 0.5m of flue length & every 90 degree bend is classed as 1.0m of flue. If longer flue lenghts are required then you can use a Twin Flue assembly and can then flue upto 14m ( 46ft ) but you must class each bend as 1.0m (3ft 3) regardles if it is a 45 or 90. The other factors are the flue termination which is another host of rules and regs but i will give you more info on that if you require it . Hope i have answered your question and best of luck. Gasman.
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Thanks Gasman, Your answer was a big help. it's a gas condenser wall mounted we are having installed. Our prefered option is to put it in the cuboard about 10 feet form the nearest outside wall. It will mean at least one bend maybe 2 at most.
Well it will almost certainly be ok then with one bend but without surveying the site myself it sounds close to the cut off point for two bends for me to say a deffo yes, that is if you are fluing horizontally . You also got to remember that the condensate drain has to disperse into a suitable drain or porpose made soak-away aswell, so you may have more difficulty running a drain than running the flue. Any questions on the condensate drain or other fluing queries feel free to ask. Best of luck . Gasman.
My daughter has just had one fitted and it had to be moved to the other end of the kitchen from where the old one was sited.. as the plumber said they have to be on an outside walls now..
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Gasman What are you views on the Alpha CD32C boiler. .

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