Do it all with one phone call.(Brief Article)

Plumbing contractors who add HVAC work like the increased profit and expanded customer base.

PLUMBING CONTRACTORS who have added HVAC work say it's a winning move. "I've told other contractors to do air conditioning because there's more profit margin plus you've got a bigger pool of customers," says Bruce Jefferson of N.C. Jefferson in Princeton, NJ.

"I think it's just good business," says Gene Burch of Gene Burch Plumbing & Heating in Novato, Calif., adding that the transition takes a year to do correctly.

"I can't tell how much time and money w