Vent Cap Systems
The 4 Nodes of Professional Duct Testing
Every clean, repeatable duct test depends on four control points. Patented Vent Cap Systems™ help you control all four.
Supply Sealing
Reusable Vent Caps™ replace tape and plastic on supply vents for faster, cleaner setup.
Shop Vent Caps →Return Sealing
Duct Ninja™ seals return grilles under depressurization without ladders, tape, or improvisation.
See Duct Ninja →Placement & Access
Pole RAT™ installs and removes vent caps from the floor without dragging ladders through homes.
View Pole RAT →Measurement Equipment
Shop TEC and Retrotec blower doors, duct testers, gauges, and diagnostic tools.
Browse Equipment →Choose Your Testing System
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Seal Floor Vents for Duct Testing (25 Pa Guide)
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