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ID = Immediately Dangerous. Gas line capped at appliance. It is an old boiler as the flue is 'balanced' not fanned. All new boilers are fan flued. Gasafe call free of charge. I doubt the sale would comple as the resite would need a compliance notice and it won't have/get one. I can only...

Is the existing flue lined? If so and it terminates correctly then it may be ok dependant of they fire you want. If not thermalite is not acceptable

Example. Fire 6kw Boiler 20kw total 26kw minus 7kw for adventious air = 19kw Direct to outside would be 19x5cm squared = 95cm squared total required. If the calc says 100cm then 100cm it needs to be (squared) NOT advisory.

If it has ben installed recently it breaches gas regs. No flue allowed in an entry. Plus unless it is an existing boiler resited it needs to be a condensing boiler o it breaches part L too. Speak to builder first and voice your concerns. If no joy contact Gasafe. They will inspect the install

If you did you would need to be a RGI.......

Angelf. Can i suggest you join the CC and post there in future? You seem to be using a DIY site to get answers to issues for which you are being paid for. None of us know everything about everything but this is a DIY site. Not an aid to help you make money out of others knowlege when if you...

NO combi will give a megaflo a run for it's money IF the supply/domestic side is set up correctly. Forget the combi and fit unvented correctly and you won't be disappointed.

It's overheating Your plate heat ex is most likely sludged or scaled. Clean or replace

Er no. Tanking is an entirely seperate process. That said if marine ply is used (totally waterproof and stable)you should be ok. WBP is water resistant not water proof

If your pressure is fluctuating dramatically replacing the prv will do no good. More likely the expansion vessel needs recharching or replacing. Is your system clean? Sludge may slow the pump. Does the pin on the micro switch at the back left of the hydaulic block make? Check this. Does the...

You need a gas safe engineer to sort it i am afraid.....

I think you need to call in an RGI. It could be a number of things but they would need a gas safe engineer to assess

Most parts are available. Be aware tho that i believe the insulation/seals are asbestos and as such i certainly wouldn't mess with the boiler. Any damaged bits would also need special treatment and disposal. Finally, with todays modern boilers/systems i really think you would be better off...

someone on here once recommended that if you ever think a job is dogie or you might not get paid fit a hidden gate valve and leave it off. When they pay you will fix ie 2 minutes to open it up! Make sure it's a cash payment tho!

This is a DIY forum but forum rules prevent us offering advice on restricted trades issues. As Tony has pointed out this installation needs to be completed by an engineer with a G3 ticket......or you won't get the buildings control sign off

Yup...new diverter valve required.

If it means entry into the combustion box you will falling foul of the regs. As such i can't advise you. This site doesn't offer help of diy gas work. Sorry

Read the OP's post again...he had had TWO quotes at 40kw. But he is arguing over the 30kw quote after doing calcs showing he needs 35....... It's money.....trust me. And i didn't insult him......i questioned his motives.

How odd......if you're unhappy take one of the other quotes with a 40kw boiler........or is it they are more expensive. Customers!

Wrong part.......you need 248207