Barryscotland Posted December 1, 2021 Share Posted December 1, 2021 Been offered a new Vaillant 425 which is described as an “open vent only boiler” I don’t think it is suitable but want to make sure before I turn it down an my plumber is awol till after new year so can’t ask him. I need one to run an unvented cylinder and ufh anyone no for sure if the “open vent only” bit means it needs to be supplied from a header tank etc n not suitable for our needs Link to comment Share on other sites More sharing options...
ProDave Posted December 1, 2021 Share Posted December 1, 2021 Even if the boiler needs to be on a vented system fed by a header tank, that does not stop you having an unvented hot water tank. The boiler circuit just heats the input coil and is not hydraulically connected to the water inside the unvented tank. And it will connect to UFH as well. There might be other reasons for not choosing it. Link to comment Share on other sites More sharing options...
PeterW Posted December 1, 2021 Share Posted December 1, 2021 They have pretty cheap and nasty aluminium heat exchangers in them and a 2 year warranty as standard. For the money there are better boilers, and to get anything more than the 2 years you have to use a Vaillant installer. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now