Energy-efficient windows often feature multiple glass panes, gas fills, low-e coatings, and well-insulated frames. Proper installation is crucial to ensure a window's energy efficiency benefits are ...

Double-hung windows are slightly more expensive, easier to clean and ventilate, and less energy-efficient. Some or all of the mortgage lenders featured on our site are advertising partners of ...

Matt Johnson, left, an HVAC technician, and Ben Sevigny, a thermal installer, both with ReVision Energy, a New England company specializing in solar energy and electric heat pump installations, work ...