The directions I have say 3” from the top for mounting but online it says 9”.taponitrof · August 12, 2021 · A The directions I have say 3” from the top for mounting but online it says 9”. The Hound Heater™ Deluxe can be placed 3” from the top of the doghouse. The 9” directions are for the previous version of the Hound Heater™ that does not have a fan and comes with a heat shield. Back to Top