PENETRATE INTO THE BLOWER AND MOTOR CARTERS, CAUSING SOME DEFECTS. Appendix 2: Optional air return adapter (SFA0252) The optional air return adapter (SFA0252) can be added to the furnace blower box to increase the efficiency of your system. This option allows you to take in the fresh air from the rooms connected to the return system and bring it back towards the furnace to be heated. This option can be installed on either sides of the blower box. Complete installation instruction can be found in the instruction booklet provided when purchasing this option.
1 air return adapter
2 caps
1 filter
N.B.: TO ENSURE ADEQUATE STATIC PRESSURE, THE SYSTEM SHOULD BE BUILT IN A WAY THAT THE VOLUME OF COLD AIR RETURN IS AT LEAST EQUAL OR SLIGHTLY HIGHER THAN THE VOLUME OF THE HOT AIR DISTRIBUTION.
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