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Air Handler Downflow Kit
NAS downflow conversion kits consist of a new coil access cover. All other components needed for downflow conversion are included with the standard air handler.
1 year warranty from date of purchase
Part Number: (NAHDFB)
For NASS/NASV24B Downflow kit small
Part Number: (NAHDFC)
NASS/NASV36C Downflow kit medium
Part Number: (NAHDFD)
NASS/NASV24B 16" x 20" x (1" or 2") For small chassis

Air Handler Filter Kit
Flush mount filter racks for the NAS air handler. Adjustable to fit 1.0" or 2.0" filters. Supplied with a 1.0" disposable filter.
1 year warranty from date of purchase
Part Number: (NAHFBB)
NASS/NASV24B 16" x 20" x (1" or 2") For small chassis
Part Number: (NAHFBC)
NASS/NASV36C 20" x 20" x (1" or 2") For medium chassis
Part Number: (NAHFBD)
NASS/NASV48D & NASS/NASV59D 20" x 24" x (1" or 2") For large chassis