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17549 – S25 Black Nat

Note: If replacing an existing unit, the same or less btu output heater should be used.  Contact us if you have questions.

Mounting kits are universal across all models.  If you are replacing the same btu heater, the old  mounting hardware can simply be transferred to the new unit.


Heater Type: S25 Black (Natural Gas, Black Finish)

Output: 25,000 btu

Serial Number: 17549

Voltage: 24VAC

Mounting Height: 8-10 feet from the floor.  Top clearance 14″ when heater is angled 30 degrees.

Coverage: Typical coverage is 9×9 ft area.

Literature: S34/S25 Manuals, Field Wiring, Spec Sheet

Notes:  There are some rub marks and small scratches to the outside case.  The lid shows some discoloration which is not visible from the ground.  The unit was part of six that were briefly installed (less than 1 month) and returned for S34’s. This heater has been bench tested and carries a 1 year warranty same as new.