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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Froststat https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1385632935 Message started by JohnD on Nov 28^th, 2013, 10:02am

Title: Froststat
Post by JohnD on Nov 28^th, 2013, 10:02am

I have a Baxi 105e boiler and cannot find out whether it has a froststat built in. Given that I have an efficient roomstat do I need a froststat as well? And if so do I need a roomstat also?

The house will be left unoccupied for long periods.

I assume these are wired in parallel with the roomstat?

Thanks in advance

John D

Title: Re: Froststat
Post by thescruff on Nov 28^th, 2013, 10:26am

Should have an integal frost stat and functions only with the selector switch in the hot water and htg mode.

Would be better to sdd a system frost stat as well

Title: Re: Froststat
Post by Lectrician on Nov 28^th, 2013, 12:43pm

The external frost stat will bypass the timeclock as well as the standard room stat. Whenever the temperature drops below (say 3º), the heating will come one, regardless of the time of day.

A comprehensive system would also have a pipe stat on the boiler return pipework, wired in series with the frost stat. That way, as soon as warm water starts to return the boiler, the boiler is turned off again, so it just keeps the pipework warm.

You want to heat your house though don't you? So you would be better of with a thermostat set low.