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Polaris Anzen Spa Blower, 2 HP 220 Volt Bottom Mount

Polaris Anzen Spa Blower, 2 HP 220 Volt Bottom Mount
Price: $349.00
Item Number: AZN156603
Manufacturer: Polaris
Click Here for Polaris-Anzen Spa Blower Manual
Polaris Anzen Spa Blower
All blowers are equipped with a patented thermal protection device that prevents overheating from excessive back pressure or mechanical problems. An auto-reset feature automatically restarts the motor once it has cooled. The unique thermal valve also compensates for temporary rises in temperature so the blower motor is less likely to reach the shutoff point.

Review of Blower Sizing

Many problems can be attributed to improperly sized blowers. Accurately sizing the blower for the application is crucial for proper blower function. Damage caused by incorrect sizing is not covered under the warranty.

Several factors influence sizing:
Blower motors are cooled by air flowing over the motor. The amount of air required to prevent overheating is determined by the blower horsepower (HP), the system back pressure and the number and size of the air holes/jets in the spa. Airflow is measured in cubic feet per minute (CFM).  Different horsepower blowers require different levels of air flow to keep the motor cool. A higher HP motor requires more flow. System back pressure, measured in inches of water, is the sum of the forces restricting air flow over the blower motor and through the spa plumbing.

 Limiting forces include:
Pipe diameter
Number and type of elbows
Length of run Check valves
Number of spa jets
Size of spa jets
As back pressure increases, air flow decreases, reducing the
ability of the motor to stay within normal operating temperatures.
Maximum Back Pressure For Blowers
Bower HP Inches of Water
1.0 45
1.5 45
2.0 50
Airflow Ranges for Blowers (for 2" PVC)
Blower HP Min Airflow Max Airflow
1.0 30 SCFM 90 SFCM
1.5 45 SCFM 90 SFCM
2.0 50 SCFM 90 SFCM

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