The most reliable method is to check the serial number on your fan's nameplate

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As a veteran-grade molded case circuit breaker

The Schneider Electric (Square D) 8910DPA63V09 is a heavy-duty 3-pole contactor designed for demanding heating

For mid-to-large scale commercial and industrial boiler maintenance

International Environmental 71520317 Thermostat R-410A The most reliable method isThe International Environmental 71520317 Thermostat is a high reliability 24V digital fan coil controller designed specifically for 2 pipe and 4 pipe configurations. As an OEM International Environmental Corporation (IEC) part, this 7 day programmable thermostat features a three speed fan control and a Thermoglow backlit display for clear visibility in mechanical rooms or tenant spaces. This unit is engineered with Neverlost Memory, ensuring that your