Old System - Upgrade Advice

[andrew1810]

Hello,

Before I start, I should point out that I'm not a plumber so apologies if I have anything horribly wrong.

I have an old CH system which is not really heating the house very well so am looking at upgrading the boiler.

Current system:
Baxi Bermuda back boiler (roughly 30 years old)
Single pipe
Primatic Cylinder with small but noisey header tank directly above it in the airing cupboard


I'd rather avoid replacing the pipes if possible, 2 rooms have laminate and some of the furniture probably can't be moved out of the rooms without completely taking apart.


From what I've read I have 2 options:

1) Combi and risk the old pipes leaking (have extended cover on the insurance just in case)
2) Lower pressure system boiler, replace cylinder and add extra tank in the (very small) loft



House is 3-bed, 1 bathroom spread over 3 floors


I'm getting quotes from local plumbers for the work but want to make sure I'm asking for the right thing



Thanks

 

[Simon F]

you can keep the open vented set up, doesn't have to be a sealed system, but yes upgrade the cylinder. most boiler manufacturers will say that for the warranty to be valid on the installation you will need to change to a 2 pipe set up.

 

[RoryD]

It is essential that the back boiler be decommissioned AND disconnected. It's a big deal to undertake for a DIYer

 

[jtsplumbing]

Sorry but the lot needs to be replaced, modern boilers not suitable for one pipe system, if you have limited space better of with combi, but get one with long warranty (Sime Murel HE) 10 years parts and labour so no need to take out extra insurance for 10 years this alone could save £3000.00 +.
Not counting saveings on running costs, (Pilot light) on old boiler about £100.00 pr year ! possable saving on gas bill about 35% if system is fitted correctley. Remember get at least 3 quotes:gettree:

 

[diamondgas]

If the system is working fine now then replacing the heat source with a boiler suitable for an open system is perfectly okay. You do have to upgrade the design to current requiremens of building regs Part L. Thermostatic controls throughout, room stat cylinder stat etc. And it would also be advisable to have a good flush out & magna filter fitted... Obviously a full heating replacement would be the better option and the more advisable one, long term. But if it means too much upheavel and cost then the conversion to two pipe could be done at a later date... IMHO