'Back Boiler' Central Heating system

Dick_here

Hi

Moved into the property last summer and the surveyor's report mentioned that the system was old and replacement parts would be difficult to obtain etc. So far, so good though as it's working well. However, should it go wrong, will a new boiler be required ? If so, will that mean a whole new heating system or will a replacement 'back boiler' (i.e. behind the fireplace) be possible ? Also, it's a single pipe radiator heating system, is this an issue should we wish to replace the central heating ?

ormus

you can still get baxi back boiler systems but most peeps say they are old fashioned and they are inefficient compared to modern condensing combis.
when the time comes, a new modern boiler is the answer.

we did this same thing 2 yrs ago. our gas bill is 30% less now.
(combined with extra insulation).

Canucklehead

Good afternoon: Building regulations would require the replacement of your BBU with a condensing boiler (with rare exceptions...more info on the installation and specification of gas central heating systems is available here http://www.energysavingtrust.org.uk/uploads/documents/housingbuildings/ce30.pdf )
Most CORGIs would recommend replacement of your one pipe system. Hopefully your BBU will continue to chug along for a few more years...ensure it has an annual service and if you don't have one , get a carbon monoxide alarm.

HTH

Canucklehead

Razor

By the time you have replaced the BBU and firefront and possibly the chimney liner it'll cost the same or more and as pointed out its very unlikely you can have one anyway!

The only other point is that when you have a replacement boiler it will be time to fit TRVs to the rads, most are not suitable for one pipe systems.

Get it serviced, as long as the heat exchanger doesn't split most BBUs are almost indestructable fit an alarm and save up for a complete new system in the future

Dick_here

Thanks guys.

Now, what's a TRV ?

I see ads in the local paper for central heating systems with 7 rads etc for around 2k. How much on top should I expect it to cost to remove what we've already got, (inc single pipe system remember) ?

Possetjohn

!!!!!!_here wrote: »

Thanks guys.

Now, what's a TRV ?

TRV is a thermostatic radiator valve. Controls the room temperature by controlling flow of water to the radiator. Liquid filled sensors are the best (like Drayton TRV4s).

Regarding cost there are others more expert than me. Depends on size of house and if you use a combi boiler or have a separate hot water tank. Sounds like almost a complete replacement so I would think in the 4-5k range. Get some quotes (at least 3) from CORGI registered plumbers. Talk to friends and get some recommendations if poss.

Best of luck

economiser

!!!!!!_here wrote: »

Hi

Moved into the property last summer and the surveyor's report mentioned that the system was old and replacement parts would be difficult to obtain etc. So far, so good though as it's working well. However, should it go wrong, will a new boiler be required ? If so, will that mean a whole new heating system or will a replacement 'back boiler' (i.e. behind the fireplace) be possible ? Also, it's a single pipe radiator heating system, is this an issue should we wish to replace the central heating ?

Back boilers are not fashionable and are relatively inefficient. However they are very reliable, we had one for thirty years with only one breakdown. They are also very simple to service. If it is working OK and you are happy with it keep it! Don't replace it with a modern boiler in order to save money. The improved efficiency will never pay back the installation costs.

Nothing wrong with one pipe systems although again not fashionable in the UK. I have one and it works fine. Be careful though about fitting TRV#s (thermostatic radiator valves). You need valves designed for one pipe systems as they must be low resistance (sometimes called "high lift").