How to Clean and Maintain Ventilators
Longer version for those older units.
Short version for newer units.
Venmar Constructo 1.5, 2.0 and Solo 1.5, 2.0
How to clean a Venmar EKO 1.5 HRV or ERV
How to clean and maintain HEPA 3100 and HEPA 4100 units
Cleaning Fantech SHR series units
If diffuser is already in ceiling, unscrew the center diffuser part and carefully pull down alternating side to side and it will SLOWLY work its way out.