Install a high efficiency ventilation system.

As homes become increasingly airtight for the sake of energy efficiency, they also accumulate pollutants and humidity indoors, which increases the need for mechanical ventilation systems to reduce major health impacts. But mechanical ventilation that brings in cool air and evacuates hot air will generate a net energy loss during heating season. The solution is to install a high efficiency system that can save that energy, reducing the emissions of GHGs.

Our recommendations :

If there is no central ventilation system in the home and you are not planning to install one, at least install high efficiency fans in the bathrooms to evacuate excess moisture. The fans should have a discharge flow of at least 50 cubic feet per minute (25 L/s) and the used air outlets must be outside the home. Besides using 65% less energy than conventional models, ENERGY STAR® fans have other benefits: they’re quieter and they displace more air.