Vent Cap SystemsRetrotec, Ltd.Retrotec Blower Door | 5100 SeriesImage showcases the Blower Door by Retrotec, highlighting its patented SmartCloth technology. Ideal for air infiltration testing in residential and small commercial settings. Does not include promotional offers.
Vent Cap SystemsRetrotec, Ltd.Retrotec Blower Door | 5100 SeriesImage depicts a professional standing next to a fully assembled Retrotec Blower Door System, emphasizing its user-friendly setup. An optional hard-sided fan case for secure storage is also shown.
Vent Cap SystemsRetrotec, Ltd.Retrotec Blower Door | 5100 SeriesImage features the 5000 Series Calibrated Fan by Retrotec, showcasing its sleek design and emphasizing its calibration for precise air infiltration testing.
Vent Cap SystemsRetrotec, Ltd.Retrotec Blower Door | 5100 SeriesImage displays the 5000 Series Calibrated Fan equipped with Range Ring A, B8 Plate, and 8 x 4-inch Blank Plugs, illustrating its versatile and comprehensive testing capabilities.
Vent Cap SystemsRetrotec, Ltd.Retrotec Blower Door | 5100 SeriesImage shows a professional standing next to a fully set-up Retrotec Blower Door System, hand on the DM32 digital gauge, highlighting ease of use and advanced technology in air infiltration testing.
Free Bonus
Get a FREE Total Home Pack ($775 value)
Our best-selling kit — included free with your system.

What You Get

  • Complete Retrotec 5100 Series Blower Door system
  • FREE Total Home Pack ($775 value) — Vent Caps + Pole RAT included
  • Seal supply vents in seconds — no tape, no residue
  • Install and remove caps from the floor — no ladders, no bending

Why It Matters

The blower door measures leakage to the outside. Vent Caps let you seal supply vents so the duct system is isolated — your readings reflect the home itself, not duct leakage skewing the results.

The Pole RAT lets you install and remove vent caps from the floor — no ladders, no bending, faster setup, cleaner workflow.

Your FREE Total Home Pack ($775 Value)

The Total Home Pack is our best-selling kit — built for crews sealing whole homes, especially houses with multiple HVAC systems where the vent count adds up fast. You get the volume of caps a real blower door test actually needs, plus the Pole RAT to handle ceiling vents from the floor.

Sealing oversized returns? You may want to add a few larges later — especially if you're running into 14" returns regularly. Give us a call and we'll sort you out.

Same kit pros pay $775 for on its own. Included free with your system, while this offer lasts.

Faster setup. No tape waste. Repeatable results.

Retrotec Blower Door | 5100 Series

$ 4,950.00
$ 4,950.00
Model: Wifi & Regular Cloth
Still deciding?

Compare this system with the Minneapolis Blower Door option before you choose.

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