Amazing Work..
Bromek Knudson

Wonderful read,had to smile at the (One Pipe System) comment,mine has been in 35years,same boiler Ideal standard cost in repairs £165 !!!!! None of the latest to have stuff full of PCB's etc and I still can get the spares ie pump,thermostat,thermocouple,gas valve,not according to B Gas parts not available will need new boiler 'sir',thank you for a good site.

I have read your articles from beginning to end. Very informative. Living in the RG9 postcode area I shall contact you this summer to ask you to service my Potterton Ultra 2/50 system boiler installed by British Gas 1998.
Best wishes
Graham

I love my Netaheat 10-16 gravity system with a hot water storage cylinder and the expansion tank in the loft. It was installed in 1985 and has served me well, with very few parts replacements. I know that gas valves are no longer available for the Netaheat (except thru eBay) but other parts still are I believe. I'm confused because on the internet I've read that the Netaheat is dangerous and inefficient - is that true? When the time comes, I think I would still prefer to keep the gravity/hot cylinder/expansion tank arrangement. Are there still "old-style" boilers on the market that are not condensing?

Hi, I must say I've spent a few hours this evening reading your notes on how to and what not to do, it's been more helpful than any book I've ever read or course I've ever attended ! Thank you so much your a bloody genius :)

Just thought I'd say thank you for putting the information on heating systems up on your site. My parents' old house is going on the market and the CH (installed nearly 45 years ago) now needs an overhaul. I wasn't sure what type it was until I read your articles describing the different systems!

Regards

Paul H

My 94 year-old mother's system is 20+ years old, and she's been told by the Gas Board man that the boiler has 'had it'. I've been trying to understand what will need doing to change her boiler - and thus also her system from a gravity one to a more modern one - and your description is VERY helpful! Thanks.