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It depends on the cost of electricity and the cost of natural gas in your area. Generally, using a 5000 BTU natural gas heater is cheaper than using a 1500 watt electric heater. Natural gas is typically more cost-effective for heating compared to electricity.
btu of natural gas to btu of propane
102,000 BTU = 1 ccf
Ther are 1,050 BTU in one cubic foot of natural gas.
Typically, use 5 * the volume in cubic feet to get BTU/hour for natural gas heaters. For this shop, that works out to 180,000 BTU/hr. Lower ceilings would make a big difference here...
For the purpose of gas rating 1040 btu's/ft3
natural gas
There is no set size. The size depends on how many Btu of heat is needed for the burner in the appliance , heater or machine you are running .
Yes, if you change the orfice out, the lp orfice is smaller than ng. Orfices sized by BTU's.
138,700 btu's
1 Nm3=36308.96 btu
In US units, one standard cubic foot of natural gas produces around 1,030 BTU.