Entries by Andrea Foss

Can A House Be Too Tight?

  The Importance of Mechanical Ventilation During most presentations we give about air sealing and infiltration, like clockwork someone will ask, “but doesn’t the house need to breathe, aren’t we making buildings too tight?” This is a popular green building myth, but  people need to breathe, walls don’t. In fact buildings perform best when they’re […]

Getting it Right – HVAC System Sizing in Multifamily Buildings

Properly Sizing Mechanical Systems in Multifamily Buildings Multifamily buildings can be a unique challenge when it comes to selecting effective heating and cooling systems. In the Washington, DC region’s mixed-humid climate, humidity control becomes a central challenge because of a couple inescapable realities. There is a lot of moisture added per square foot from cooking, […]