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External Filter Maintenance
Aluminum mesh, 2-inch deep filters are located in the
supply weatherhood (if the weatherhood option was
purchased). Filters should be checked and cleaned on
a regular basis for best efficiency. The frequency of
cleaning depends upon the cleanliness of the incoming
air. These filters should be cleaned prior to start-up.
To access these filters, remove bottom bolt in the access
door on the side of the weatherhood. Slide the access
door up and then pull bottom out to remove door. Then,
slide the filters out (see figure at right).
Clean filters by rinsing with a mild detergent in warm
water.
Internal Filter Maintenance
The HRE units will typically be provided with 2-inch,
pleated filters in the outdoor air and exhaust airstreams.
These filters should be checked per a routine
maintenance schedule and replaced as necessary to
ensure proper airflow through the unit. See table at
right for pleated filter size and quantity for each unit.
Replacement filters shall be of same performance and
quality as factory installed filters. Filter type must be
pleated design with integral metal grid. Two acceptable
filter replacements are Aerostar Series 400 or Farr 30/30
®
.
Outdoor Air Filters: Access to the outdoor air filters
is through the door labeled as “Filter Access” on the
outdoor air side of the unit.
Exhaust Air Filters: Access to the exhaust air filters
is through the door labeled as “Filter Access” on the
exhaust air side of the unit.
Refer to Access Door Descriptions section for additional
information on filter locations.
Door Seal Maintenance
Slip-on type vinyl seal is installed on the perimeter of the
door openings. Inspect at least annually to ensure that
seal is still pliable and intact.
Outdoor air intake hood
mesh filter access
ROUTINE MAINTENANCE
Filter Size and Quantities
Model
Internal
Filter Size
Quantity
Supply
Quantity
Exhaust
HRE-20 20 in. x 20 in. 2 2
HRE-45 20 in. x 25 in. 3 3
HRE-55 16 in. x 25 in. 6 6
HRE-90 20 in. x 20 in. 8 8
Bearings
Mostbearingsarepermanentlylubricatedandrequirenotfurtherlubricationundernormaluse.Normaluse
being considered -20ºF to 120ºF and in a relatively clean environment. Some bearings are re-lubricatable and
will need to be regreased depending on fan use. Check your bearings for grease zert to find out what type of
bearing you have. If your fan is not being operated under normal use, bearings should be checked monthly for
lubrication.