The Minneapolis Blower Door has long been recognized as the best designed and supported building airtightness testing system in the world. Combined with specialized accessories and testing procedures developed by The Energy Conservatory, the Minneapolis Blower Door is the system of choice for utility DSM programs, energy raters, HVAC contractors and weatherization professionals.
Complete with everything you need for fully automated Blower Door testing.
Built-in Cruise Control allows you to automatially control the Blower Door fan to maintain a constant 75 Pa, 50 Pa, 25 Pa or 0 Pa building pressure without having the gauge connected to a computer.
Our lightweight, rugged, injection molded fan housing has a 5 year "no questions asked" warranty.
Precise, stable flow measurements without the need for gauge dampening.
The Model 3 Fan provides quick and accurate flow measurements from 300 to 6,300 CFM (includes Flow Rings A and B).
Optional Flow Rings C, D and E will measure down to 11 CFM.
Variable fan speed control (solid state - cruise control compatible).
110V/60 Hz model.(Contact manufacturer for purchase of 220v)
The standard Model 3 Minneapolis Blower Door system includes:
Fan with variable speed controller and fan control cable.
Two Flow Rings (A and B) and No Flow Plate.
DG-700 Pressure and Flow Gauge
TECTITE™ Building Airtightness Testing Software
USB cable - 16 feet (5 meters) long
Fabric door panel with viewing window.
Five piece adjustable aluminum door frame and frame
Padded attache case to hold gauge (not included), manuals, tubing,
speed controller, and fabric panel, with room for a laptop
computer and other documents.
Model 3 Blower Door Fan:
6,300 CFM at free air (2,973 l/s, 10,700 m3/h) .
5,350 CFM at 50 Pa (2,524 l/s, 9,090 m3/h).
5,000 CFM at 75 Pa (2,360 l/s, 8.495 m3/h).
Minimum Flow: 300 CFM with Ring B (141 l/s, 510 m3/h).
85 CFM with Ring C (40 l/s, 144m3/h).
30 CFM with Rings D (14 l/s, 51 m3/h).
11 CFM with Rings E (5 l/s, 18 m3/h).
Dimensions: 20 in. (50 cm) inlet diameter, 10.25 in (26 cm) length.
Weight: 33 lbs. (15 kg) with Flow Rings A & B.
Flow Accuracy: +/- 3% with DG-700, Rings D & E +/- 4% or 1 CFM.
Calibration: Meets ASTM Standard E779-03, E1554-07, CGSB-149.10-M86, EN 13829,
ATTMA Technical Standard 1 and NFPA 2001.