3500-5821/A A/C Control Box.
2-wire control box package used when adding a/c to a 3500 or EB series downflow electric furnace that is not a/c equipped. Used with a 2-wire thermostat (not included). May be adaptable to older electric furnaces. Package includes a 40VA transformer, thermostat relay, 24V fan relay, system switch, fan switch, wires, plug, box & condensate trap. Replaces 3500-5821.
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