Hot Dawg 75,000 BTU Natural Gas Garage Ceiling Heater

A:  I can’t give you a definitive opinion without being onsite. However, this may help. This is a unit heater. It dumps out hot air. Heat chases cold. It is this principle of thermal dynamics that is used to move the heat to different parts of the structure. This is the same way heat emanating from a wood stove heats a home. This much simpler to a distributed heating system where duct work separates and channels heated air to different areas of the structure based on their need. Distributed heat is more even and comfortable but more involved. For this reason, my selection would not be based on comfort but on what would give the most reliable and safe installation. I would select a location that offers the best and safest location to run the vent pipe to the outside in accordance with the installation manual, the shortest possible run of gas line, as gas line needs to be sized in relation to how long it is. The longer the gas line the larger the diameter of pipe that needs to be used. And lastly, I would look for a location that is away from the garage door so that if the garage door is opened you don’t have hot air racing outside. If you scroll down the Home Depot product listing page you will come to a section entitled Product Details. If you expand that section, you will find PDFs of the product documents. If you open the use and care manual, you will find further information about selecting a location.

A:  From the way your question is worded I am getting a conflicting vision of what you are asking. Rather than giving you bad information let me direct you to the information itself. If you scroll down the Home Depot product listing page you will come to a section entitled Product Details where you will find PDF’s of the product documents. If you open the one entitled Use and Care Manual you will find the unit mounting discussed beginning on page 5. Venting, both vertical and horizontal begin on page 6 and continuing through page 11. These are the prodigals that have been tested and validated by the third party testing agency called ETL. Installations must comply with these standards.

A:  This model has an Aluminized Steel heat exchanger. If you look at the Product Details on the Home Depot web site it calls out that this versions carries the model number HD75AS0111SBAN. The fifth digit in, “A” indicates aluminized steel heat exchanger. That digit would be an “S” in versions with a stainless steel heat exchanger. Stainless steel is significantly more expensive and does not necessarily increase the life expectancy in most applications. I have seen stainless specified in certain greenhouse applications due to specific air born corrosive chemicals. Up grading to stainless would be a factory special order and would need to be done through a Home Depot store. Modine produces many different versions of the HD75 hot dawg heater. Such as different voltages, fuels, gas valves etc. All would carry different model numbers indicating their specifics. This version, the HD75AS0111SBAN, is the most common.