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specifically the XJAL-020Z-CFV series
the 25-series is suitable for air or water as long as they are compatible with the cast iron body and stainless steel trim
800-0422 is functionally identical
Common Questions What is the maximum fluid temperature rating for this assembly
preventing the corrosive buildup that can lead to heat exchanger failure
Marvair 70947 Control Board 319848-301 specifically the XJAL-020Z-CFV seriesThe Marvair 70947 Control Board is the central diagnostic and operational hub for high efficiency Marvair HVAC systems, including MAH and MGH vertical wall mounted units. As a veteran grade OEM replacement control board, this component is engineered to manage critical HVAC system functions such as compressor sequencing, low ambient fan cycling, and lead lag logic. It features an integrated diagnostic LED to assist technicians with rapid fault