Back
HD75_360
HDB75_360
HD75_front
HD75_left front
HD75_right front
HDB75_front
HDB75_left front
HD75_360 thumbnail
HDB75_360 thumbnail
HD75_front thumbnail
HD75_left front thumbnail
HD75_right front thumbnail
HDB75_front thumbnail
HDB75_left front thumbnail
video thumb

HD/HDB Series

Hot Dawg® Power-Vented Gas-Fired Unit Heater

When cold weather hits, count on the Modine Hot Dawg® Power-Vented Gas-Fired Unit Heater (HD/HDB) to deliver powerful, consistent heat where you need it most. Designed for performance and built to last, this low-profile unit heater combines commercial-grade durability with quiet, efficient operation, making it the go-to choice for garages, workshops, warehouses, and light commercial applications.

Models

  • Model HD: Power-Vented with Propeller Fan
    • 6 Model Sizes: 30, 45, 60, 75, 100, and 125 MBH
  • Model HDB: Power-Vented with Centrifugal Blower Fan
    • 4 Model Sizes: 60, 75, 100, and 125 MBH
Where To Buy

Highlighted Features

Modine hot dawg power-vented gas-fired unit heater, adjustable blades and heat exchanger detail view

Reliable, Efficient Heat Delivery

Built with a power-vented design and dimpled tube heat exchanger, the Hot Dawg safely removes combustion gases while maximizing fuel efficiency—delivering steady, even warmth with less energy waste. Perfect for keeping garages or workspaces comfortable all winter long.
Modine hot dawg power-vented gas-fired unit heater, model hd45, ceiling mounted in a residential garage

Space-Saving, Ceiling-Mounted Design

Designed for convenience, this compact heater mounts easily from the ceiling, freeing up valuable floor space. Its low-profile layout makes it ideal for areas where room is limited, like garages, workshops, and service bays.
Modine how dawg gas-fired and power-vented unit heater, sleek gray powder coated finish with black and brushed stainless steel logo decal detail view

Quiet, Durable Performance

Engineered for quiet operation and constructed with corrosion-resistant materials, the Hot Dawg ensures dependable performance year after year. Once it’s installed, you’ll barely notice it’s running—except for the consistent comfort it provides.

Product Details & Specifications

Key Features
  • Power-Vented System: Safely exhausts combustion gases outdoors, ensuring clean, efficient operation and consistent comfort.
  • Venting Versatility: an integral power exhauster allows vertical or horizontal venting with the smallest-diameter vent pipe possible.
  • Compact, Low-Profile Design: Installs effortlessly in confined areas or overhead, requiring only 1 inch of clearance from the ceiling to optimize available floor space.
  • Baked Polyester Paint: Features a neutral-colored, baked-on polyester paint that provides excellent corrosion resistance and durability while blending into a wide variety of environments.
  • Durable Heat Exchanger: Aluminized steel tubular heat exchanger resists corrosion and extends product life.
  • In-Shot Burners: In-shot burners on each heat exchanger tube for reliable performance, ease of serviceability, and low sound level on flame ignition/extinction.
  • Electric Knockouts: Electric wiring knockouts and field wiring connections keep installation costs low and save time on installation and maintenance.
  • Flexible Mounting Options: Choose from ceiling or wall configurations for a custom installation.
  • Quiet Performance: Ideal for environments where comfort and low noise matter.
  • Fuel Flexibility: Operates on natural gas or propane for convenience across applications.
  • Thermal Efficiency Up to 83%: Reduces energy use while maintaining reliable output.
  • ETL Certification: ETL certified for residential, commercial, and industrial use in the US and Canada.
  • Proudly Designed, Engineered, and Assembled in the USA: Commitment to quality and craftsmanship in every unit.
Options
Fuel Type:
  • Natural Gas
  • Propane
Available Models:
  • Propeller Fan (HD)
  • Centrifugal Blower Fan (HDB)

Model Sizes:

  • HD – 6 Model Sizes: 30, 45, 60, 75, 100, and 125 MBH
  • HDB – 4 Model Sizes: 60, 75, 100, and 125 MBH

Heat Exchanger Material:

  • Tubular, Aluminized Steel (Standard)
  • Tubular, 409 Stainless Steel (Optional)

Supply Voltage:

  • 115V/1PH/60Hz
  • 208V/1Ph/60Hz
  • 230V/1Ph/60Hz
  • 208V/3Ph/60Hz
  • 230V/3Ph/60Hz
  • 460V/3Ph/60Hz
  • 575V/3Ph/60Hz

Iginiton Type:

  • Single Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry
  • Two Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry
Accessories
  • Room thermostats
  • Vent caps
  • Vibration isolation
  • Unit transformers
  • Vertical deflector blades
  • Two-point suspension kit
  • Conversion kits for natural gas and propane, including high-altitude kits
  • 30, 60, and 90-degree air deflector hoods
  • Summer-Winter Toggle Switch
  • Discharge air transitions (Blower models only)
  • Blower enclosure (Blower models only)
  • Filter racks (Blower models only)
  • Blower belt guard (Blower models only)

For a complete list of accessories, please contact your local Modine representative.

Warranty
Applications

The Hot Dawg® HD/HDB is designed for residential garages, workshops, and commercial environments that need powerful, quiet, and reliable heat.

Common applications include:

  • Home garages and hobby workshops
  • Small warehouses and storage buildings
  • Retail stock rooms or maintenance bays
  • Greenhouses and agricultural spaces
  • Service stations and auto repair shops
  • Specialty retail and other light commercial spaces

Tech Documents

Related Products

PDP_front left

PDP/BDP Series

Vertical Power-Vented Gas-Fired Unit Heater

7 Model Sizes: 150 TO 400 MBH

Our Legacy model – Efficient, reliable heat for large spaces. Certified for commercial and industrial applications.

Natural Gas or Propane