Smart thermostats

[Dee]

Hi,

I had a Baxi 400 boiler installed last year and wanted to install a Nest or similar to give me remote control over on and off. Baxi replied to my query....

 

'You have what’s called a “heat only” boiler, which means that smart controllers are going to have limited functionality with this system. The reason for that is that heat only boilers only have 2 modes: on and off, and they don’t output data back to controller so it can monitor usage. So your boiler would still effectively just be using the room stat to monitor the temperature and would call for heat when the temperature fell below the set point. You’d be able to install smart controls, but you wouldn’t get the full benefit of the smart controller with the boiler you have now.

With a heat only boiler and a hot water cylinder, it’s usually preferable to have a programmer that’s scheduled to come on at certain times to heat the cylinder and others to heat the property.'

 

I know it says all I need to know but I thought they were the holy grail!

[JohnMo]

1 hour ago, Dee said:

know it says all I need to know but I thought they were the holy grail!

Which bit is the holy grail, a heat only boiler, Baxi or smart thermostats.

 

I would say a priory demand hot water (PDHW) running on weather compensation (single zone, fully balanced) was the holy grail for a radiator system.

 

[marshian]

1 hour ago, JohnMo said:

Which bit is the holy grail, a heat only boiler, Baxi or smart thermostats.

 

I think he was refering to the Smart Thermostats as Holy Grail - They aren't and it's very easy to over zone and screw the boiler efficiency

 

1 hour ago, JohnMo said:

I would say a priory demand hot water (PDHW) running on weather compensation (single zone, fully balanced) was the holy grail for a radiator system.

 

 

Absolutely ^ this ^ - Running the lowest flow temp possible to maximise condensing efficiency improvements

 

Do Baxi not have their own controls to enable PDHW because if they do I'd be using that - in fact I'd always favour manufacturers controls over 3rd party ones.

 

The only reason I have a Wiser system is previous boiler manufacturers controls were archaic because the boiler design was 18 years old - when I change the boiler I stayed with the 3rd Party controls because I'd learnt a lot about what not to do!!!!

 

"Experience is what you get when you don't want it"