Hi is there any problems with adding radiators to the loft on a sealed combi boiler system. I no with a vented system it can be a problem due to the header tank not being high enough.
adding radiators to loft combi system
- Thread starter XanderHarris
- Start date
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Will be OK, but more than likely need to re-balance system afterwards.
How many are you adding? Be aware that main runs of pipework from boiler, usually 22mm, can only distribute so much heat. For the 22mm, it will be OK for approx 38,000BTU or 40KW. If the pipes that you are extending to the loft from existing rad circuits are already up to the limit, you may need to make changes.
How many are you adding? Be aware that main runs of pipework from boiler, usually 22mm, can only distribute so much heat. For the 22mm, it will be OK for approx 38,000BTU or 40KW. If the pipes that you are extending to the loft from existing rad circuits are already up to the limit, you may need to make changes.
Thanks, what kind of radiator/s would I require for a attic 4.7meters long, 5.2 meters wide and 2.7 high at the highest point (roof is pitched)?
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There are rad sizing calculators online to help with sizing.
http://www.radcalcer.co.uk/
https://www.bestheating.com/btu-calculator
http://www.radcalcer.co.uk/
https://www.bestheating.com/btu-calculator
Is well within the heat output of 22mm as there is only 5 radiators on the system so far. I'll use the rad calculator could you give me a rough idea what size rad/ btu output I will likely need as the calculator many not be too accurate with it having a sloping roof and no option for an attic space on the calculator.
Its coming up with 4000btu's do that sound about right?
Sounds small to me
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