Does it matter if the unit is not at the top of the doghouse?taponitrof · August 12, 2021 · A Does it matter if the unit is not at the top of the doghouse? We recommend that the unit be at the top of the doghouse for the comfort of your pet as well as it tends to allow the most extra space for your pet. Any vertical wall is ok to mount the Hound Heater™ (never the ceiling). Back to Top