Newsreader wrote:

For example, re-jet a Viking gas cooktop for LP, and each burner's BTU
rating drops by 500, as per spec sheet he

http://www.vikingrange.com/MEDIA_Cus...vgsu_specs.pdf

on page 2.

I don't have the spec handy, but my gas fireplace rating is lower with
LP than NG as well.

How strange. Maybe the pressure is lower with LP gas?