Modine HD75 Hot Dawg Heater - HD75AS0111

Name: Modine HD75 Hot Dawg Heater | HD75AS0111 | 75,000 BTU NG
Availability: InStock

75,000 BTU Gas Unit Heater | 115V

The Modine HD75, specifically model HD75A0111, delivers 75,000 BTU/hr input with 61,500 BTU/hr output for residential, commercial, or industrial heating applications. This power-vented propeller unit heater features an aluminized-steel heat exchanger, 115V single-phase power, and direct-spark ignition with single-stage natural gas controls for reliable operation in garages, workshops, and light manufacturing spaces.

Part of the low-profile Hot Dawg series, the HD75 mounts to standard 16″ or 24″ joist spacing with included L-brackets and delivers 1,160 CFM airflow with a 38-foot heat throw at maximum mounting height. Explore additional natural gas and propane unit heaters or browse compatible replacement motors to maintain your heating system.

All in-stock units are shipped the same day before 3 pm.

Returns and warranty claims are processed directly through your authorized distributor, Heinlein Supply

Call now for an accurate price quote and estimated delivery time.

773-774-8616

HD75AS0111 Technical Specifications & Performance Data

The HD75 is a gas-fired, power-vented propeller unit from the Hot Dawg® low-profile series. Following the manual’s nomenclature, this code identifies a 75 MBH input unit (75) with an aluminized steel heat exchanger (A), standard direct spark ignition (S), 115V power (01), and single-stage natural gas controls (11).

Heating Capacity

75,000 BTU/hr Input | 61,500 BTU/hr Output

Efficiency & Airflow

82% Minimum Efficiency | 1,160 CFM | 769 FPM Velocity

Motor & Electrical

1/12 HP | 1,625 RPM | 115V/60Hz/1ph | 3.3-3.75 Amps

Mounting & Throw

14′ Max Mounting Height | 38′ Heat Throw

Gas & Vent Connections

1/2″ Gas Connection | 3″ Vent/Combustion Air Connector

Cabinet Dimensions

26.8″ W x 18.0″ H x 16.5″ D

Installation & Service FAQ

What does the “S” in HD75AS represent?

The “S” indicates the standard direct spark ignition system. This system features 100% shut-off and continuous retry capabilities for enhanced safety and reliability.

Is a transformer included internally?

Yes. The unit includes an internal step-down transformer that converts 115V primary power to a 24V control circuit.

What are the required clearances for maintenance?

While 1 inch is the minimum access clearance, 18 inches is recommended on the access side for service. Rear clearance should be 18 inches, with 4 inches for the vent connector.

Which high-altitude kit is needed for this model?

For installations between 2,001 and 8,500 feet, use kit #67248 (label only). For altitudes between 8,501 and 9,500 feet, kit #68405 is required.

Modine HD75 Replacement Parts and Accessories

The following components and venting accessories are specified for the HD75AS0111:

If you don’t see the replacement part you need online, please call to order as our inventory is updated daily.

Need Technical Selection Help?

For internal parts such as gas valves or burners, please have your full serial number ready to ensure correct replacement identification.

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