23 Oct '13, 10am

Building Science: The Ventilation Omission That Can Make You Sweat

If the system is designed to run continuously and factors in the negative pressure created by the duct system it's attached to, this can work well. A typical ERV Energy-recovery ventilator. The part of a balanced ventilation system that captures water vapor and heat from one airstream to condition another. In cold climates, water vapor captured from the outgoing airstream by ERVs can humidify incoming air. In hot-humid climates, ERVs can help maintain (but not reduce) the interior relative humidity as outside air is conditioned by the ERV. , though, can move 100 to 200 cubic feet per minute (cfm) of air. A typical house needs maybe 50 cfm (depending on the size of the house, the number of occupants, and which ventilation standard you go by). What many designers do is set the ERV to run intermittently, say 20 minutes out of each hour, to meet the ventilation needs of the ho...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/building-s...

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