I'm designing a natural ventilation / fan assist project using just windows and exhaust fan for ventilation. This credit said that for "mechanically ventilated system, MERV-13 is required...". Does this apply to natural ventilated building as well and we don't get this credit, or is MERV-13 exempt? Thanks.
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Vermont House of Representatives
11468 thumbs up
June 11, 2010 - 3:11 pm
The MERV-13 requirement only applies to mechanical systems. If you don't have a mechanical system, you can still earn the credit by meeting the other requirements.