"Robert11" > wrote in message
...
> Hello,
>
> Just curious about gas usage for proposed Weber Q-320 grill which I will
> be purchasing.
>
> Realize there are lots of variables involved, but with the two burners set
> at, e.g., MED, how many hours of usage from a full 20 lb tank should I
> expect ?
>
> And, is the 20 lb size the typical tank size for all of these household
> Deck type grills ?
>
> Thanks,
> B.

It is about 93,000 Btu per gallon. A 20 pound cylinder is filled to about 4
gallons. All you need to know is how many Btu per hour you'll be burning on
medium.

Get a spare tank. They run out at the most inopportune times.