Overview

The Aprilaire 4851 blower activation relay is used to allow the humidifier to energize, or turn on the furnace blower in order to circulate humidity even when the heat is off. Typically, the humidifier runs when the thermostat activates heating. With this relay installed, however, humidification will be available at any time.

Specifications

More Information
Manufacturer Aprilaire
Product Length 3.750
Product Width 3.350
Product Height 1.950
Product Weight 0.180
Package Length 4.200
Package Width 3.100
Package Height 2.100

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