Whether or not you will use natural gas or propane often has to do with how rural your home is.  My home’s hot water and radiant floor glycol runs on propane. If this is not budgeted for, the bill will boggle your mind. 

Xcel is a provider of natural gas.

Ferrell Gas (is in Basalt and Grand Junction), White River Energy (this company is out of Meeker but they deliver to the Silt and Rifle area) and Amerigas are propane suppliers.