Install a duct pressure switch from grainger to help your hvac system do its job.
Duct pressure switch installation.
An air switch senses positive negative or differential air pressure and actuates an internal switch.
Push the included silicone tubing onto the barbed pressure probe and push the 90 plastic elbow into the open end of the tubing.
Duct pressure switches automatically start and stop auxiliary devices like electronic air cleaners duct heaters humidifiers exhaust fans and duct booster fans.
Install a duct pressure switch from grainger to help your hvac system do its job.
Installing too close to a duct booster fan will cause the switch to short cycle the fan see figure b.
Drill 2 1 16 pilot holes where mounting bracket holes were marked.
Duct pressure switches automatically start and stop auxiliary devices like electronic air cleaners duct heaters humidifiers exhaust fans and duct booster fans.
Mount the airflow switch on a flat surface ideally in a clean dry environment but can be mounted externally.
Orient the open end of the elbow towards the direction of the central blower air handler see figure d.
Install the pressure switch on the supply plenum or in a main supply duct.
An air switch senses positive negative or differential air pressure and actuates an internal switch.