The /mm standard horizontal flue kit includes the ° elbow and suitable for condensing boilers only. Q how can i have wall insulation installed? Whether you are looking to pay for a new boiler to be installed at your property in leeds and paying in one lump sum or need an option to spread the payments over a manageable monthly payment plan, we can help. The lightest boiler on the uk market*, being only .kg it's suitable as a replacement for old boilers. Got a toilet that keeps.