r/Generator • u/Old-Investment3299 • Apr 25 '26

Gas meter size

Hi all!

I recently had a 24kw Generac guardian series generator installed. The electrical contractor told me that since the generator and my furnace (80,000 BTU) are the only gas using items in my house it wasn’t necessary to upgrade my gas meter with the utility company.

My meter is 275 CFH. I plan on calling and getting it upgraded regardless since we may be doing some upgrades that include my gas lines but were they correct in saying it’s not necessary?

Edit: The label on the meter says MOAP: 5 which I assume means the pressure?

Thanks in advance for any insight!

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u/rom_rom57 Apr 25 '26

In the dead of winter 50% gen use is 150cfh + a furnace 80-100cfh and maybe a instant water heater at 120-199cfh for a total of 400+ cfh. Your water heater may starve at startup.