In what kind of Direct Vent Fireplace will the fan operate?

The fireplace must have at least 3 3/8″ space between the bottom of the firebox and the lower edge of the frame, and must have a 115 VAC electrical receptacle under the firebox to plug the power adapter into to create the 12 volt DC power for the fans. The picture below shows how to measure the space and illustrates the 115 VAC receptacle. If there is no receptacle under the firebox, we can supply a Thermostat Cable or Switch Cable to allow operation with the Adapter plugged into a receptacle near the fireplace. Do not operate the adapter with a dimmer switch or rheostat controlled outlet. The adapter will be damaged and the fan will not run.