Modine Hot Dawg Heater HD45A - Natural Gas

Quiet Overhead Heat for Growing Spaces - Natural Gas Model

Cold nights stress plants, and floor-mounted heaters take up space you need for benches and systems. This suspended gas unit heater keeps floor space clear and runs quietly. It uses power exhaust, so venting runs through the side wall or roof with small-diameter pipe, and the manufacturer lists a full 10-year warranty on the heat exchanger.

The HD45A is a mid-range size in the Hot Dawg line. It fits a greenhouse, propagation room or workshop where you want dependable supplemental heat. Growers with larger structures often install several units. It ships as a single heater.

Key Features & Benefits

• Low-profile suspended design — mounts about 1 in from the ceiling with two angle brackets and leaves the floor free.
• Power exhaust — simplifies side-wall or roof venting with small-diameter vent pipe.
• Direct spark ignition — controls shut off gas fully and keep retrying ignition.
• Permanently lubricated motor — reduces routine maintenance.
• Reversible connections — flip the unit to move the gas, electrical and flue connections to the other side.

Who Should Use Modine Hot Dawg Heater HD45A

Greenhouse operators, indoor growers and hobbyists who need quiet supplemental heat for vegetative growth or flowering rooms and have a natural gas supply will find this unit a practical fit.

About Modine Hot Dawg Heater HD45A

Modine makes the Hot Dawg line of gas-fired unit heaters. The HD45A is the natural gas model, and the line is also offered with a blower as model HDB. Installation and service documents are published by Modine.

Frequently Asked Questions

Q: Does this heater run on natural gas?
A: Yes, this listing is the natural gas model. Check the installation manual for the correct gas supply setup before you install it.

Q: How is it mounted?
A: It hangs from the ceiling using two angle brackets. It can sit close to the ceiling to save space.

Q: How is it vented?
A: It uses power exhaust, so it vents through a side wall or roof with small-diameter vent pipe. Follow local code and the manual.

Q: What is direct spark ignition?
A: It lights the burner with an electric spark and no standing pilot flame. If ignition fails, the control shuts off gas and retries.

Q: Can I change the connection side?
A: Yes. Flipping the unit over moves the gas, electrical and flue connections to the opposite side.

Q: Should a qualified installer fit it?
A: Gas heaters should be installed by a qualified professional following local code and the manufacturer manual.