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If I have wired up a room thermostat incorrectly (and this is quite possible!), would this have an adverse affect on the programmer/timer? Both items are Honeywell and, unfortunately, due to their ages I do not know the model numbers. By adverse affect, what I mean is, could an incorrectly...

ChrisR/Gas4you. You were both correct in saying that the pipes are probably too small even for the boiler I have now - they are! My radiators were measured this morning and ideally I require a Baxi 24 HE to run my system. However, without replacing the pipes (an expensive option) I can only...

Thanks ChrisR.

Namesag. If you read what I put earlier, I said he was a friend of a friend - I do not know him anymore than I know you! I was only concerned because so many people were putting such an emphasis on powerflushing and this had not been mentioned by him - I now know that a chemical flush will...

Hi gasmanuk, and thanks. Just spoke to the installer and he confirms that he will flush the system with chemicals. He is Corgi qualified but, I believe, under his company - he mentioned someone else inspecting the install and signing it off. Is this allowed? And, so to clarify, because I am...

Now starting to get a little paranoid!!! So system can be flushed to standard without the need of a Power Flushing machine - and my new boiler will be safe? Can this and a new boiler be done in one day? If the Corgi Engineer that is installing the boiler for me is registered under his company...

Thank you all for your advice. Unfortunately, I do not have 2/3 weeks as recommended - I will be lucky if I still have heat/hot water on Christmas Day. It is planned that a friend of a friend will install a new boiler for me on the 29th December (Baxi Solo 18 HE). He is Corgi registered and is...

I am having my 19 year old boiler replaced. Will I require a powerflush and what does this involve? I take it that without a powerflush my new boiler could get messed up?

The Baxi Solo range are all A Rated according to google searches I have carried out. 8 of my radiators are doubles, all the others (singles) have fins coming out of the back. 4 of the double radiators are in the bedrooms and we do not like the bedrooms too hot anyway. 1 of the double...

Thanks gas4you. One final question and I will leave you in peace. If the pipework is adequate for the Solo 18 and it is indeed fitted. What is the worst that could happen if (because of the amount of radiators I have) I really should have had the Solo 24 fitted. The radiators will still get...

More technical information! The Gas Boiler is probably sited no more than 12' from the gas meter outside the house. The pipework from the meter appears to be about the same size as the 2 pipes coming out of the top of the boiler. The narrowist pipe is the one the runs from the main gas pipe...

I am going to get extremely technical now! The pipework going into the boiler at the bottom (I guess from the main supply) is quite narrow. The 2 pipes coming out of the top of my boiler are quite chunky. Which pipes would require replacing for a bigger boiler - all of them?

Probably not :(

Thanks gas4you. Now I am starting to have a better understanding of things! The Corgi fitter that has seen my system wants to install a Baxi Solo 18 HE Condensing Boiler - I guess he has worked out everything and knows what he is doing. I only started to have my doubts when another Corgi...

ChrisR. It would appear that I have offended you in some way - this was never my intention! I have not discounted, and greatly appreciate the advice that I have been given. How does one work out the heat loss for a house - my 25 years in the army never taught me this (can you bridge a...

Thanks Nixt. The old boiler is a Potterton Netaheat 16/22 (16-22 KW). The Baxi Solo 24 is, in fact, only 22 KW and therefore I do not see a problem.

Thanks ChrisR. your calculation is far too complicated for me!

I want to replace my faulty 19 year old Potterton Netaheat 16/22 Gas Boiler. The replacement boiler needs to be capable of running 13 radiators (I have a 4 bedroom, 2 bathroom property). One Corgi Engineer has recommended a Baxi Solo 18 HE Condensing Boiler. Another Corgi Engineers says I...