THE 4 NODES OF PROFESSIONAL DUCT TESTING

Every clean, repeatable duct test depends on four control points.

Only Vent Cap Systems™ can help you control all four.

Supply Sealing

Reusable Vent Caps™ replace tape and plastic on supply vents for faster, cleaner, safer 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 SYSTEMS

Starter

Seal supply vents from the floor.
Vent Caps™ + Pole RAT™

Shop Starter Systems →

Complete Systems

Duct BlasterS® Blower Doors
& FREE VENT CAPS™

Shop Complete Systems →

Professional

Add return grille sealing.
Vent Caps™ + Duct Ninja™

Shop Professional Systems →

Most Popular Systems

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TOTAL HOME PACK - Duct Testing Kit
$ 775.00
$ 775.00
Duct Ninja™ Return Grille Seal for Duct Leakage Testing
$ 650.00
$ 650.00
The "MINIPACK" - Vent Covers For Duct Testing
$ 425.00
$ 425.00
Retrotec Combo
$ 8,850.00
$ 8,850.00
TEC COMBO - Blower Door, Duct Blaster, and Vent Caps
$ 8,499.00
$ 8,499.00
Vent Cap Combo
$ 1,199.00
$ 1,350.00
$ 1,199.00

Professional Testing Equipment

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Retrotec US340x DUCTESTER (Latest Model)
$ 3,870.00
$ 3,870.00
Minneapolis Duct Blaster® System (with DG-1000)
$ 3,650.00
$ 3,650.00
TEC COMBO - Blower Door, Duct Blaster, and Vent Caps
$ 8,499.00
$ 8,499.00
Retrotec Combo
$ 8,850.00
$ 8,850.00

Look Like the Professional You Are

Stop dragging ladders, climbing on beds, and wrestling with tape just to seal supply vents. Vent Caps™ install in seconds from the floor, giving you a faster, cleaner, and more professional workflow your customers will immediately notice.

Seal the Return. Instantly.

After taping for minutes, the Duct Ninja™ seals the entire return in seconds. No tape. No wasted time. Just a fast, airtight connection to your duct tester — and a workflow that finally feels professional.

Latest Posts

Why Pressurized vs. Depressurized Duct Leakage Tests Can Differ
Mar 10, 2026

Why Pressurized vs. Depressurized Duct Leakage Tests Can Differ

Small differences between pressurized and depressurized duct leakage tests are normal. Learn why duct systems behave differently under pressure and why repeatable...
View Details
Feb 20, 2026

10 Reasons Your Duct Leakage Testing Equipment Isn't Working (And How to Fix It Before Your Next Job)

  We've all been there. You show up to a job site, start setting up your duct leakage test equipment (Duct Blaster®...
Feb 17, 2026

Florida Building Code 101: What the 7 ACH50 Rule Means for Your Duct Leakage Testing Workflow

  If you're running blower door tests in Florida, you've definitely heard about the 7 ACH50 requirement. And if you're new to...