while Carrier expects to start sales in December. One downside is that these units will cost more than standard heat pumps, which already cost a bit more than central air conditioners. While ...

They're more efficient than gas and oil heat and better for the climate. But they're not cost-effective where electricity is ...

In the dog days of summer, there’s nowhere a dog—or person—would rather be than in front of the air conditioner, enjoying a pleasant breeze instead of the sweltering heat outside.

An engineer named Willis Carrier — still a name ... This is a type of heat pump, and some heat pumps are little more than air conditioners that can switch their cold side and hot side via ...