Roomside replaceable fan filter unit
Embodiments described herein relate to a method for utilizing a roomside replaceable fan filter unit having an integral aerosol injector ring. The method begins by replacing a used filter from the fan filter unit with a replacement filter from a roomside of the fan filter unit. Air is then pulled into a housing of the replaceable fan filter unit and out through the replacement filter to the roomside by a fan module. Finally, an aerosol challenge is provided at a location adjacent and upstream of the fan module.
1. A method for utilizing a replaceable fan filter unit comprising an integral aerosol injector ring, comprising:
replacing a used filter from the fan filter unit with a replacement filter from a roomside of the fan filter unit;
pulling air into a housing of the replaceable fan filter unit and out through the replacement filter to the roomside by a fan module, the fan module upstream of the replacement filter; and
providing an aerosol challenge at a location adjacent and upstream of the fan module.
2. The method of claim 1 , wherein providing the aerosol challenge comprises:
injecting aerosol from an injector disposed in the housing.
3. The method of claim 1 , wherein providing the aerosol challenge comprises:
providing aerosol from an injector disposed in a collar disposed upstream of the fan filter unit and configured to mate with ductwork.
4. The method of claim 1 , wherein providing the aerosol challenge comprises:
distributing evenly the aerosol into the inlet of the fan filter unit.
5. The method of claim 4 , further comprising:
injecting aerosol through multiple ports in the integral aerosol injector ring to multiple locations around the perimeter of the fan module.
6. The method of claim 4 , wherein integral aerosol injector ring is disposed upstream of an air moving blade of the fan module.
7. The method of claim 1 further comprising:
controlling a speed of the fan module via an adjustment control located on a downstream side of the fan filter unit.
8. The method of claim 1 further comprising:
testing the replacement filter for leaks and/or filtration efficiency.
9. A method for utilizing a fan module comprising an integral aerosol injector ring, comprising:
forcing air through a filter housing with a fan module disposed upstream a filter to the roomside of the filter housing; and
providing an aerosol challenge at a location adjacent and upstream of a fan blade in the fan module.
10. The method of claim 9 , wherein the fan module is disposed in the filter housing.
11. The method of claim 9 , wherein providing the aerosol challenge comprises:
injecting aerosol from an injector disposed in the filter housing.
12. The method of claim 9 , wherein providing the aerosol challenge comprises:
providing aerosol from an injector disposed in a collar disposed upstream of the fan module and configured to mate with ductwork.
13. The method of claim 9 , wherein providing the aerosol challenge comprises:
distributing evenly the aerosol into the inlet of the fan module.
14. The method of claim 13 , further comprising:
injecting aerosol through multiple ports in the integral aerosol injector ring to multiple locations around the perimeter of the fan filter unit.
15. The method of claim 13 , wherein the integral aerosol injector ring is disposed upstream of an air moving blade of the fan module.
16. The method of claim 9 further comprising:
controlling a speed of the fan module via an adjustment control located on a downstream side of the housing.
17. The method of claim 9 further comprising:
testing the replacement filter for leaks and/or filtration efficiency.