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magicno1

Gas Engineer
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I have a customer who lives in an old cottage. It was originally two cottages now knocked into one.
She has two combi boilers both 24kw running off a 4 pack of 47kg.
The installation is sound no leaks. Basically she is runnng her heating on both boilers for roughly 4 hours a day and hot water on top. Shower am and pm.
In 4 weeks they have used 4 new bottles and now on 2 more delivered today.
Does this sound excessive??????i know there is a calculation for consumption but just want some opinions please????
Cheers
 
Do you mean 4 bottles per boiler ???

Its difficult to calculate anywhere near exact because boilers modulate down to lower rates after a while of operation. But based on 4 bottles
...

if they ran at full rate together (48kw) then from my reckoning they would last approx 55 hours running time on the boilers only.
Less again with the hot water and hob/cooker.

As i say this is very rough and based on max rate obviously during winter they are gonna use more gas.
 
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On tapatalk and cant tell - are you gas safe registered with lpg ??
 
A 45kg bottle should give snout 630 (ish) kw .
So that is about 27 hours use at 24 kw. (That's only one boiler) so about 14 hours for both combined. In an average day if the heating is on for 8 hours and the boiler modulates down its probably running about half that.


So if you don't want to do the maths, with that set up . With my rubbish maths�� at this time of year........"....... It will use a bottle every 3-4 days.

edit!! Just re read the post. It's only on for 4 hours. Do double my figures to 6-8 days.

looks like it's about right
 
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Sounds about right based on a couple of custs that have this setup, not cheap to run!
 
Any chance of them going for bulk storage tank ? cheaper than bottles
 
If you carry out work for calor their guys will advise, pretty sure they need bulk storage
 
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