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// CODE SNIPPET

Section 406 Ventilation of Uninhabited Spaces

Mechanical Code 2018 of Maryland > 4 Ventilation > 406 Ventilation of Uninhabited Spaces
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406.1 General

Uninhabited spaces, such as crawl spaces and attics, shall be provided with natural ventilation openings as required by the International Building Code or shall be provided with a mechanical exhaust and supply air system. The mechanical exhaust rate shall be not less than 0.02 cfm per square foot (0.00001 m3/s • m2) of horizontal area and shall be automatically controlled to operate when the relative humidity in the space served exceeds 60 percent.

Related Code Sections


Section 406 Ventilation, Ventilation of Uninhabited Spaces
Uninhabited spaces, such as crawl spaces and attics, shall be provided with natural ventilation openings as required by the International Building ...
Mechanical Code 2018 of Maryland > 4 Ventilation > 406 Ventilation of Uninhabited Spaces
602.1 Duct Systems, General
Supply, return, exhaust, relief and ventilation air plenums shall be limited to uninhabited crawl spaces, areas above a ceiling or below the floor ...
Mechanical Code 2018 of Maryland > 6 Duct Systems > 602 Plenums > 602.1 General
307.3 General Regulations, Condensate Pumps
Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served ...
Mechanical Code 2018 of Maryland > 3 General Regulations > 307 Condensate Disposal > 307.3 Condensate Pumps
R408.1 Foundations, Ventilation
1,500 square feet (140 m 2 ) of under-floor space area. One such ventilating opening shall be within 3 feet (914 mm) of each corner of the building ...
Residential Code 2015 of Maryland > 4 Foundations > R408 Under-Floor Space > R408.1 Ventilation
R408.1 Foundations, Ventilation
1,500 square feet (140 m 2 ) of under-floor space area. One such ventilating opening shall be within 3 feet (914 mm) of each corner of the building ...
Residential Code 2018 of Maryland > 4 Foundations > R408 Under-Floor Space > R408.1 Ventilation
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