By Brian Walker

Use of variable refrigerant flow (VRF) technology, already popular in Japan and Europe, is growing in the United States. Developers are using VRF in many types of buildings, including multi-family residential, schools, and office buildings. Because of its efficiency, VRF…

By Brad Pease

Baby, it’s cold outside. And possibly inside, too. Building engineers are gearing up for the usual complaints that it’s freezing on one side of the office while it’s too hot on the other side. The result is likely higher utility…