This depends on whether you will use the Blower Door and Duct Blaster with one person or split the kits up. If both systems are with one person or on one truck and are used one at a time then only one gauge would be necessary. You can always add another gauge at a later date.

It also depends on whether you would conduct a Duct Leakage to Outside test. This test requires that the Blower Door maintain a building pressure of 25 Pa while the Duct Blaster adds flow to offset the pressure of the Blower Door on the ductwork. It is easier to perform the test when you have 2 gauges.

Please call for pricing. 612-827-1117