Common Technician Questions Which Reznor models use the 257246 control board

making it an essential component for both air and water-source equipment

reducing inventory complexity for service technicians

This model utilizes a 1/8" NPT female air connection

fitting standard 2

Greenheck SP-B90 Ceiling Exhaust Fan 318423-701 Common Technician Questions Which ReznorThe Greenheck SP B90 is a high performance ceiling exhaust fan engineered for continuous or intermittent ventilation in commercial and high end residential applications. Operating at 115V with a 1500 RPM motor, this unit delivers a nominal 90 CFM, making it an ideal bathroom exhaust fan for moisture control and air quality management. The low profile housing is constructed from heavy gauge galvanized steel, designed to fit into tight ceiling plenums