6.6188.2 Removing Supply Vents from Garages

Topic:

Supply

Subtopic:

Special Considerations

Desired Outcome:

Safe removal of garage supply vents

Manufactured Housing

	Title	Specification(s)	Objective(s)
	6.6188.2a Removal of supply/return in garage	Supply run feeding the register will be truncated as near to the supply plenum as possible If directly connected to the plenum, the supply run will be truncated at the plenum If connected to a Y or T branch system, the supply run will be truncated at the Y or T Return grille located in garage will be removed in the same manner as supply	Minimize duct leakage
	6.6188.2b Patching of the hole in the duct system created by removal	All holes in sheet metal ducts will be patched with sheet metal and secured with sufficient screws to hold the patch flat without gaps Holes left in any Y or T will be capped with sheet metal caps and fastened with at least three screws	Ensure a secure and strong patch
	6.6188.2c Sealing of the patch	All patches will be sealed with mastic meeting UL UL Underwriters Laboratories 181 and in accordance with manufacturer specifications	Ensure an airtight patch
	6.6188.2d Removal of discarded ducts	All abandoned ductwork will be removed from work area	Provide a clean work site
	6.6188.2e Patching of the register hole in garage	Holes created by the removal of the register and boot will be patched and taped using material meeting local codes	Prevent a fire hazard
	6.6188.2f External static pressure testing	Units will be tested for external static pressure ( ESP ESP External static pressure ) before and after work If there is a significant rise in ESP ESP External static pressure , air flow testing will be required	Ensure correct fan performance
	6.6188.2g CAZ CAZ Combustion appliance zone testing	CAZ CAZ Combustion appliance zone testing will be performed where combustion appliances are utilized	Identify possible conditions that can cause unsafe equipment operating conditions