I'm looking for some advise from any gas fitters out there.
We had a new boiler fittted last month (Veissmann 100 compact 19kW) along with a replacement gas pipe.
No problems with the boiler looks and works fine.
Bit concerned with the sizing of the gas pipe though.
It was installed by a Gas Safe Registered fitter but having done a few calcs of my own I think the pipe is undersized.
Any chance someone can check over my calcs before I call him back
Pipe details are as follows :-
From the meter.
9.3 Meters of 22mm copper with 6 x 90° bends
reducing to 4.2 meters of 15mm also with 6 x 90° bends to the boiler
No other gas appliances are in the house.
Allowing an extra 0.3m for each 90° bend gives an effective length of 11.1 (22mm) and 6 meters (15mm).
19kW needs flow of 1.78 m³/hour
Gives pressure drop of 0.37mbar through the 22mm and 1 mbar through the 15mm - Total 1.37mbar pressure drop.
I think this is out of spec as I thought 1 mbar was the max.
Any help gratefully received - Thanks.
We had a new boiler fittted last month (Veissmann 100 compact 19kW) along with a replacement gas pipe.
No problems with the boiler looks and works fine.
Bit concerned with the sizing of the gas pipe though.
It was installed by a Gas Safe Registered fitter but having done a few calcs of my own I think the pipe is undersized.
Any chance someone can check over my calcs before I call him back
Pipe details are as follows :-
From the meter.
9.3 Meters of 22mm copper with 6 x 90° bends
reducing to 4.2 meters of 15mm also with 6 x 90° bends to the boiler
No other gas appliances are in the house.
Allowing an extra 0.3m for each 90° bend gives an effective length of 11.1 (22mm) and 6 meters (15mm).
19kW needs flow of 1.78 m³/hour
Gives pressure drop of 0.37mbar through the 22mm and 1 mbar through the 15mm - Total 1.37mbar pressure drop.
I think this is out of spec as I thought 1 mbar was the max.
Any help gratefully received - Thanks.