The major concern for HVAC's professionals is the engineering of indoor environments, but health and safety must be a primary concern too. In so far as people spend nearly 90 % of their time indoors - mostly at home -, residential ventilation ought to have a large emphasis in ASHRAE. In this article, today's sources are examined (combustion, microbiologicals, radon and soil gas, particles, VOCs), then ASHRAE's residential ventilation standard requirements are listed.