Hi all,
Whilst doing some electrical work recently with all the floorboards up and lovely neat pipework visible I couldn't help noticing the gas pipe to the boiler and, as I had just been reading an article about gas pipe sizing, it left me a little puzzled.
Main pipe was 22mm and measured (roughly by eye) around 15m's or so from the meter to the boiler and, due to the complicated structure, had 9 soldered elbows in the length. 15mm pipe tee'd off about 2m from the meter to feed hob and gas fire point.
Boiler being fed was a Worcester Heatslave 3.5 (25kw) which, according to the book, requires 2.8 m3/h of gas at max slog and the house also had a 5 burner hob (about 14kw if all used at once) and point for a gas fire (currently disconnected) ... No ovens though as these were electric.
The owner has had the installation certified when the hob was fitted, and all the pressure drops were okay as was the supply pressure to the appliances and the installation works fine.
Question is: Doing the sums based on the nice article at http://www.cda.org.uk/megab2/build/pub124/sec3.htm#4.3 Copper Tube Sizing how can there be sufficient volume of gas for it all to work?
Just curious if any experts can clarify
Whilst doing some electrical work recently with all the floorboards up and lovely neat pipework visible I couldn't help noticing the gas pipe to the boiler and, as I had just been reading an article about gas pipe sizing, it left me a little puzzled.
Main pipe was 22mm and measured (roughly by eye) around 15m's or so from the meter to the boiler and, due to the complicated structure, had 9 soldered elbows in the length. 15mm pipe tee'd off about 2m from the meter to feed hob and gas fire point.
Boiler being fed was a Worcester Heatslave 3.5 (25kw) which, according to the book, requires 2.8 m3/h of gas at max slog and the house also had a 5 burner hob (about 14kw if all used at once) and point for a gas fire (currently disconnected) ... No ovens though as these were electric.
The owner has had the installation certified when the hob was fitted, and all the pressure drops were okay as was the supply pressure to the appliances and the installation works fine.
Question is: Doing the sums based on the nice article at http://www.cda.org.uk/megab2/build/pub124/sec3.htm#4.3 Copper Tube Sizing how can there be sufficient volume of gas for it all to work?
Just curious if any experts can clarify