Gas line question

[Jamnanc]

I did my own twice. A 3/4 from the furnace/feed to the gas range, then later extended that with 1/2" to a gas dryer. It's pretty easy but sizing can be complicated, so you should get help with that part at least.
eta. There is a but calculator online that would tell you what size line the heater would need. Stoves and heaters are both high draw so it's unlikely it would me as easy as you hope.