Gas pipe sizing for garage heater

[bbf_112]

I am installing a Beacon Morris 75,000 btu hanging furnace in my garage and I am wondering what gas pipe size I should be using. The length that I am running from my house to the garage and inside the garage is roughly 125 feet. Any suggestions?

 

[Stuart in MN]

Here's one chart, there are other sites out there with similar information if you do a search on 'gas pipe sizing'. http://www.engineeringtoolbox.com/natural-gas-pipe-sizing-d_826.html

 

[ebstein]

I'd run 3/4"....then 1/2 into the unit...