Whole-Building Ventilation

 
 
 
          

WHOLE-BUILDING VENTILATION

INDOOR AIR QUALITY AND MECHANICAL VENTILATION

The traditional leaking or breathing of our homes for indoor air quality, results in the total interior air volume changing 20-40 times a day. This typical infiltration rate determined in the 1940’s mechanical code,

Tightening up of our homes has resulted in government awareness for health concerns relating to indoor air quality. For example, now in California the new building code requires mechanical fresh air Ventilation for Indoor Air Quality (IAQ) for all new residences and remodels of 1000 square feet or more. All dwelling units shall meet the requirements of ANSI/ASHRAE standard 62.2.  The Mechanical Ventilation Code 2010, was adopted Jan 2010, and enforced Oct 2010.

The new change in the home building industry, due to the rising cost of energy, and the "tightening up" of our homes to save money, is creating unhealthful living environments. Moisture caused by “Dew Point” inside of your basement from high summer humidity and a cool basement structure, can become very unhealthy. The traditional solution is to increase dehumidification, causing over cooling and excess energy use. In a response to the issues associated with indoor air qualities, and energy conservation, the concept of a "home as a system," has been adopted as the new approach advocated by the leading building science professionals of today.  The traditional home is now becoming more air tight, and very well insulated, the fundamental principles of a "Passive House." Air tight homes; require energy recovery ventilation using less power than a single 120 watt light bulb.  Ventilation and distribution is key in the overall energy efficiency of homes.

Net Zero Energy Architects was created in 2009, because of this mechanical code change.