CH boiler temp? What's you're setup.

[Thegift]

what temperature should you set a modern condensing combi boiler too?

I know in an ideal world you should try and setup so you get a return temp of 55 or lower for maximum condensing but what about if you want maximum heat quickly as possible to satisfy room stat?

I normally measure the differential temp, so say I had 18 I would add that to 55 then set boiler to 73c.

But in all honestly never really worked out the best setup.

 

[ShaunCorbs]

Depends if it's all sized right, you should get a flow and return difference of 15-20 dc

So your looking 65-70 dc on your flow

 

[Chuck]

There are more sophisticated methods but...

Start around 70°C and reduce it by about a degree a day without telling anyone until the family starts complaining.

If the system has a HW cylinder the flow to that needs to be at least 65°C or the HW won't get up to 60°C.

Balance the radiators in a period of weather when gas consumption is high. Interestingly this is not typically the coldest days of the year (when the air is still) but when it's about 5°C outside and windy.

 

[AWheating]

Number 5 on the dial

 

[townfanjon]

If your heating is on a lot of the time assuming your house is insulated well ,your radiators are sized correctly. you could try start with as low as 60 degrees , or even lower .
But if your programmer is set to say 2 hours on a morning and 4 on a night you will probably be looking 70 ish flow .
Depends on you and depends on your house

 

[king of pipes]

60 -70 degrees the lower your stat the lower your bill . cheers kop

 

[oz-plumber]

Can you leave it at 75C and install an outdoor compensator.

Get one matched to the boiler and depending on the outdoor temp the boiler will heat the water to a decreasing temp as the outdoor temperature rises.

Find that the best way without all the stuffing around of adjusting temp on boiler stat.

 

[robj20]

What boiler do you have. No option for opentherm? My flow automatically adjusts from 30c to 80c depending on load required.