Blower Door Fan Pressure Chart

Chart found on page 4 of instructions for how to properly select a fan or blower.

Blower door fan pressure chart.

Benefit from the high accuracy of the blowerdoor measuring technology. 300 passive house system. The digital gauge is shipped in a separate padded case which is stored in the blower door accessory case. Leakage by using a calibrated fan to depressurize a house.

Belt driven arrangements are available for even more flexibility. Measuring air leakage using a blower door system depends on the relationship between pressure air flow and the holes. How a blower door works. Quick connect collar for 300 ductester.

The equipment consists of a variable speed fan fan speed controller adjustable door frame for sealing the opening and a set of manometers to measure the pressure differential between the inside and outside of the house. If the suction pressure on the inlet side of a blower will exceed 15 inwg a correction for suction pressure called rarefication should be made. Maintain the high accuracy of your blowerdoor measuring technology by regularly submitting it to a calibration. Select fan using fan performance tables for 1500 cfm at 12 wg.

Measurement channels which allows you to monitor the building pressure and fan pressure air flow signals during the blower door test. Model 3 flow conversion table revised january 2007 flow cfm flow cfm fan open fan open pressure pa fan ring a ring b ring c pressure pa fan ring a ring b ring c 122 5282 1978 656 251 124 5324 1994 661 254 126 5365 2010 666 256 128 5407 2025 672 258 130 5448 2041 677 260 132 5489 2056 682 262 134 5529 2071 687 264. As you can see in the photo the blower door is installed in an exterior doorway. 5210 dual blower door system.

Blower door testing measuring building air leakage natural driving forces air leakage not measurable because pressure differences are small and variable blower door air leakage is measurable with the blower door because the pressure difference is larger and steady. Clear flange for ductester. Multiple wheels and inlet sizes are offered to provide extensive direct drive performance ratings. At 4 or rather 5 flow rings d e the accuracy of the blowerdoor testing flow rings as well as that of the pressure gauge dg 700 1 or dg 1000 0 9 clearly exceed the minimum legal.

Blower door fan case. Cincinnati fan manufactures eight sizes of cast aluminum pressure blowers. As the airflow generated by the fan is increased across the hole in the blower door the pressure difference between the inside and outside is also increased. Decrease the airflow and the pressure difference is decreased.

The manufacturer recommends the calibration of blowerdoor fans every four years.