Closed system boiler in open vented system

Hi folks...

Is there a way to put a boiler meant for a closed system into a vented system?

I've heard of putting in a filling loop instead of a filling tank... is this a good idea?

Appreciate some informed opinions.. Cheers

 

If the system is suitable it can be converted to a sealed system that would accept a system boiler

 

Don't really want to change my existing system, was just wondering if there's a way to keep the boiler "happy" so-to-speak so it works within a vented system.

 

1. Its not really possible. A sealed system relies on the primary side (radiators, heating coil) to be pressured to around 1.3 bar.
2. With a vented (unsealed) system you would have a feed and expansion tank in the loft, say, with the boiler in the kitchen. With most houses having a ceiling height of around 2.4 metres, you have the F&E about 5 metres above the boiler. One (first) floor at 2.4 metres, say 1.5 metres from ceiling to boiler in kitchen, and perhaps 1 metre from F&E to first floor ceiling. This is roughly equivalent to a pressure of 0.5 bar, so not really enough to pressurise the system.
3. Going the other way round (vented to sealed) is much easier.

 

your post is very confusing, do you mean you have an open vented boiler and want to replace it ? you can still buy open vented boilers

 

Thanks... just to play devil's advocate... what if a 1.3 bar pressure relief valve was put on the vent pipe?

 

Sorry for confusion... I'm thinking of adding a gas boiler to an existing solid fuel system... and weighing up the options of what's available. It sounds like.. so far anyway.. that I'd be best finding a boiler suitable for a vented system

 

yes you get boilers that are suitable for a vented system, tend to be a bit more expensive as not so many sold but saves you pressurising the system