These arrows point to the direction of the airflow which should be toward your furnace or air handler.
Lennox furnace air flow direction.
The term air flow configuration describes the physical orientation of a furnace relative to the direction in which heated air leaves the furnace and enters the ductwork.
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The most common terms used to describe the air flow configuration are.
A furnace filter has one side that allows it to breath fresh air through while the other side traps dust and particles from the air.
Lennox gas and oil furnaces are engineered to deliver perfect warmth efficiency and energy savings.
Upflow downflow and horizontal.
If you have already replaced your filter and your system makes excessive noise.
Delivering precise comfort and temperature control lennox furnaces can keep your home to within 0 5 degrees of your ideal temperature.