system boiler

[self-builder]

I read this on a manufacturers website. "Many people switch from a traditional open vent boiler to an open vent sealed system boiler."
What is an open vent system boiler ?

 

[Billy Bob Bob]

a open vent system boiler has a tank ,a cold feed in to the system and a vent to take water into the tank in the event of a fault

 

[fuzzy]

never heard of them? theres an open vented system (traditional) and system boilers which are sealed systems as in combis but without instant hot water.

Open vented system boiler????????? Have i read this right??????????

 

[dontknowitall]

I've just Googled that and it's from energychoices.co.uk (a consumerchoices.co.uk website).

Seems like someone has not read through the transcript properly before sending it off to the website editor/designer.

Should be changed to something like from traditional unvented system to an unvented (sealed) system or words to that affect.

To answer the question (reasonably quickly), open vent is the hot water cylinder is vented to a cistern in the loft and a system boiler is a heating appliance that heats water in a chamber and lets the controls on the central heating system do the rest (pump, zone valves, etc). A utility boiler has these items (pump, etc) incorporated into its design thus negating the need for a separate pump, zone valves, etc).