Gas boiler, controls and prog/stat

[ARW]

It seems that someone more mature than myself[1] actually did a video

[1] I never want to grow up

[Cliff Topp]

Brilliant, cheers :-)

[Roger Mills]

Why would it do that without the fan running? "Balanced" means equal input and output pressures.

[Fredxx]

I see the idea, but not all pipes are heated, nor next to a CH pipe. Therefore it's not something I would implement.

If you want to save the primary circuit from freezing then only a small amount of antifreeze is required to make the water turn into a mush rather than solid ice. If there's a concern over toxicity then propylene glycol can be used.

I have suffered a pipeburst myself and another member of the family had a more serious burst pipe on an upper floor which did quite a bit of damage to the floors below. I now always turn off the water if I leave the house during a cold spell.

I'll think I'll stick to my programmable thermostat with its own built in frost setting of 5C.

[Andrew]

There are 'old fashioned' balanced flue boilers that are not fan-forced. I suspect they are the most ineffient types going and ?most have now been recycled into Nespressos. I regularly see properties with a modern 4 inch balanced flue adjacent to a bricked up hole that was about a foot square where the old balanced flue came out.

[bert]

Thank you . Couldn't remember which was which off the top of my head.

No they would be opened up by the room stat set much above freezing

[bert]

In my case its in the corner of the integral garage. With a belt and braces approach I also have a greenhouse heater in there with a frost setting.

[Roger Mills]

Yes, indeed. But the non fan-assisted flues required some thermal activity in the boiler in order to expel the products of combustion and draw in fresh air. There would be negligible circulation without that.

[Roger Mills]

Are you sure? If the heating's on all the time anyway, there's no point in having a frost stat.

If the timer isn't calling for heat, the room stat won't do anything regardless of the temperature, and you'll be dependent on the frost stat.

[Andy Burns]

Mine's avoiding getting recycled, 78.something% SEDBUK rating last time I looked, doesn't justify the spend to replace it