Chris, If you have a propane setup now, I see little advantage to switching to natural gas. I have a set up as you describe. I have Supurb brand burners which are rated at 30,000 btus. On one for them I drilled out the jet orifice which was designed for propane. The other came with an alternate orifice that I swapped into place. For 5 gals., these things will rock! I use mine with my 23 gal boiler. I think an average kitchen stove is somewhere around 5,000 btus. My setup with natural gas is like a kitchen stove running natural gas. I put a shut off valve in line right after the point where I split off from my natural gas line. The biggest issue with running any of these burners (natural gas or propane) indoors is ventilation. These things kick out a lot carbon monoxide so fans, fresh air supply, air flow, hoods are all in order. -- Michael Valentiner, Minneapolis, Minnesota mpv(a)yuck.net