Intertherm M3RL Furnace
Overview of M3RL
The Intertherm M3RL gas furnace, a product with a 90-plus AFUE rating, is a high-efficiency direct vent condensing furnace. This discontinued downflow unit designed specifically for modular homes can use a vertical or horizontal two-pipe venting system. The M3RL is LP convertible.
Several features of the M3RL are meant to ensure a long life of the furnace. For example, the M3RL has a hot surface ignitor, a 30-second blower delay that also delivers warm air at the start-up and a 30-second post-purge that protects the heat exchanger’s longevity. The tubular aluminized primary heat exchanger is made from heavy gauge aluminized steel while the secondary heat exchanger is stainless steel.
When the M3RL is matched with a compatible coil, the blower-off delay and multi-speed direct drive blower reportedly provide an improved cooling capacity. Furthermore, this product is equipped with a diagnostic system that uses light flashes to indicate problems and help troubleshoot.
Furnace Filters for the Intertherm M3RL
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(side air return)
Consumer Reviews of the M3RL
Compare to Other Intertherm Furnaces:
The M3RL is available in different models which vary in efficiency and capacity.
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Intertherm offers a 1-year parts, labor and technician mileage warranty on its HVAC products. In addition, consumers have the option of purchasing an extended coverage plan.