Retrofitting

Building owners in northern climates have a constant struggle protecting building foundations from the expansion and contraction of frozen ground. The usual solution is to augment the insulation at the ground level, something that has […]

Many locations experience strong winds for much of the year. This can cause extreme infiltration, especially near entrance areas or service doors. Any project to stifle the force of these prevailing winds reduces the load […]

Taking a page from the residential HVAC design guide, consider that many businesses, schools, and industrial facilities have attic space. As in homes, this area is usually ventilated via gravity vents, louvers, or a forced-air […]

Effective use of negative- and positive-pressured areas in a building can be a smart way to conserve energy. Potential applications are restaurants, chemistry labs, and other areas that generate odors or fumes that need to […]

The pressure in a space can be maintained negative (or positive) with respect to a reference pressure by adjusting the volume of air supplied to and returned from the space. A differential-pressure sensor determines the […]