The ASHRAE recommended minimal thermal standard for dwelling is ____ F at 40% humidity and an air circulation rate of 45 fpm.

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has established guidelines for thermal comfort in indoor environments, including residential settings. The recommended minimal temperature standard for dwellings is designed to ensure comfort and adequate indoor air quality, taking into account factors such as humidity and air circulation.

In this case, the standard of 76°F is aimed at maintaining a comfortable living environment at a specified humidity level (40%) and an air circulation rate of 45 feet per minute. This temperature supports the body's ability to regulate its own temperature effectively while minimizing discomfort associated with high humidity, such as perspiration or a feeling of heavy air.

Lower temperature settings might be appropriate in different contexts or under different conditions, but the specific recommendation of 76°F is focused on balancing warmth with the cooling effects of humidity and air movement, ultimately fostering a more comfortable indoor atmosphere.