using an independent energy source like natural gas or propane to generate electricity and deliver it through your home's wiring to keep heating, air conditioning, and appliances running.

Gas heating systems use natural gas or propane ... ventilation and air conditioning company. “Running a new gas line to a crawl space might cost thousands if the infrastructure isn’t already ...

April Nymex natural gas ... Earlier this month, nat-gas rallied to a 2-year high on signs that US nat-gas storage levels could remain tight ahead of the summer air-conditioning season.

April Nymex natural gas ... Earlier this month, nat-gas rallied to a 2-year high on signs that US nat-gas storage levels could remain tight ahead of the summer air-conditioning season.