When the U.S. Department of Energy (DOE) first started its Weatherization Assistance Program, which is administered by the individual states, it consisted of “lots of caulk and not much else,” said Duane Griffus. Today, the program is much more than that.
It seems hvac contractors are still a little unsure how much of a margin of error to allow themselves when they bid on geothermal (ground-source or water-source) heat pump projects, according to Steven Bauman, a project consultant for New Jersey electric utilities.
The telephone is starting to ring again. And, in this weather-dependent business, you’ve started getting more work. Now is the time to do the things to even out seasonality and get ready for the times when the telephone isn’t ringing again.
The big push is on to replace R-22 unitary air conditioners and heat pumps, and it looks like the industry has really and truly decided that R-410A systems are “it.” This article offers an overview of some of the issues related to R-22 and -410A in the field: operating pressure differences, oil characteristics, and temperature glide.
When unitary heat pumps and air conditioners using R-410A were introduced to hvac contractors, many were skeptical. They had been working with R-22 systems for so long, the change seemed unreal. As recently as last year, system manufacturers themselves, though pleased with the new refrigerant’s efficiencies, were hesitant to comment on how contractors were adapting. This year they are speaking out, and the news is good.
The potential for energy conservation and resulting cash savings continues to fuel the growing popularity of variable-frequency drives (vfd’s) in hvac installations. Realizing that potential, however, has often proven elusive, due to the inherent dependency for success on proper placement of the pressure feedback transmitter in the air- or water-distribution system.
Charlie Elliot needed some marketing advice for his Sault Ste. Marie, MI, hvacr business. The president of the Michigan ACCA Chapter asked the marketing department at a local television station to develop a plan.