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NextGen-Aire.com On the top section in the middle it will be a section for air filters. Select the 5 inch filter category. On that drop-down menu select the filter size 16 x 25. Those filters need to be changed every 4 to 6 months depending on usage. Where are you have a heat pump system and it gets used year round I would suggest every four months to start.
Checked through system. Found the family room and living room zones were crossed at the zone panel. Swapped the wiring and the zones heated appropriately. Made adjustments to the outdoor reset curve. Increased the supply set point from 109 to 133 on a 50 degree day. Boiler running great.
Checked AC system in Salem NH 03079 for no cooling. System not performing well and home was uncomfortable. Found system low on refrigerant. Recommended leak search. Charged system with new refrigerant. Now cooling properly.