Energy-Efficient Cathedral Ceilings

Part 1 of Ceilings and Attics. Cathedral ceilings must provide space between the roof deck and ceiling for adequate insulation and ventilation. For most areas of the U.S., the 1995 MEC recommends R-25 to R-38 insulation in a cathedral ceiling. This can be achieved through the use of truss joists, scissor truss framing, or sufficiently […]

Attic Insulation Techniques

Loose-fill or batt insulation is typically installed in an attic. Although installation costs may vary, blowing loose-fill attic insulation—fiberglass, rock wool, or cellulose—is usually less expensive than installing batts and provides better coverage. STEPS FOR INSTALLING LOOSE–FILL AND BATT INSULATION Seal all attic-to-home air leaks, especially chases, dropped ceilings, wiring and plumbing penetrations, light fixtures, […]


Insulating ceilings is one of the most cost-effective energy efficiency measures. In addition to reducing heat loss in the winter and heat gains in the summer, ceiling insulation improves comfort by bringing ceiling temperatures closer to room temperatures and providing an even temperature distribution through- out the house. When planning and managing ceiling insulation projects, […]

Types of Air Conditioners

The basic types of air conditioners are room air conditioners, central air conditioners split-system, central air conditioners and packaged. Room air conditioners are installed directly in the windows or walls, which means they have no pipeline. The fan spray faces inside, while the condenser fan is facing outside. Room Air Conditioners Room fresh air conditioners rooms […]