Modine Hot Dawg HD125

Last updated: November 2, 2026

Modine Hot Dawg HD125
2.9/5#6 of 13 in gas garage heaters
2.9

A large shop heater from a commercial maker. The Mr. Heater Big Maxx 125 gives similar heat for less.

  • 102,500 BTU/hHeat
  • BothFuel
  • NoThermostat
Check price at Amazon$1,552

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • The most output of the Hot Dawg line, for a big shop
  • 83% efficient with direct spark ignition
  • Lower price per BTU than the small Hot Dawgs
Cons
  • At 143 lb it needs a strong mount
  • Needs a wall thermostat and venting kit, bought separately
  • 2 year parts warranty

The Modine Hot Dawg HD family

Every Modine Hot Dawg HD model we rank, smallest first. Ratings compare each against its own fuel.

ModelHeatRatingPrice
Modine Hot Dawg HD3024,900 BTU/h2.2/5$998.99
Modine Hot Dawg HD4537,350 BTU/h2.5/5$963
Modine Hot Dawg HD6049,800 BTU/h2.6/5$1,204
Modine Hot Dawg HD7562,250 BTU/h2.7/5$1,371
Modine Hot Dawg HD125 (this one)102,500 BTU/h2.9/5$1,552

How it scores

The rating comes from 3 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.

Specifications

Model numberHD125AS0111
Heat
Heat output102,500 BTU/h
GasBoth
Efficiency83%
VentingPower vented
Controls and build
ThermostatNo
Remote or appNo
Electronic ignitionYes
Weight143 lb
Warranty2 years

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