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E-Z Heat Aircraft Engine Preheater Model 441

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E-Z Heat Aircraft Engine heater for the Model 441- 3 3/4" X 5" X 1/32" pad.

Note: Please see "Engine Application Guide" Click Here for the correct EZ Heat model number for your application.

Preheating engines for winter operations is at best a miserable chore and at worst can be a disaster for the plane, the pilot & flight operations - until the development of the E-Z Heat Aircraft Engine Heater. The E-Z Heat was designed to provide very efficient engine heating for virtually all propeller driven aircraft. The heaters consist of a flexible synthetic pad that easily conforms to the contours of the oil pan. This pad will heat 12 qts of oil from -40 to +60F in an hour while using approximately 300 watts of electricity. The heater is 1/32" thick. which enables the immediate heat transfer from heater to engine.

The heaters are thermostatically controlled, so leaving them plugged in overnight means the plane will be ready to go in the morning. Normally, complete pre-heating takes only 3-5 hours for the entire engine to be nice and warm. With this new lighted plug (120V models only, 220V models include no plug to allow for European outlet variance), the owner simply needs to look out the window or peek in the hangar to see if they remembered to plug in their E-Z Heat engine pre-heater. Molded into the male plug end is a newly designed light emitting diode (LED). This LED allows the operator to visually recognize if there is electrical power to the preheat system even from a distance. FAA approved for certificated aircraft.

End your cold weather starting problems and reduce premature engine wear.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


The adhesive is already on the pad. All you need to do is peel and stick it on.

Preheat Time:
3 to 5 hours on cold soaked engine, although, since unit is thermostatically controlled, it may be left on overnight or all the time. Cowl covers and prop covers are recommended for extreme cold weather, they also reduce preheat time.

Lite Brite Plug:
With this new lighted plug, the owner simply has to look out the window or peek in the hangar to see if they remembered to plug in their E-Z Heat engine pre-heater.

Heat Transfer:
Convection/conduction, the safest way of heat transfer available. No flames or glowing elements are potential fire hazards.


  • Dimensions: 3 3/4" X 5" X 1/32"

  • Watts: 285

  • Volts: 120 or 220

  • Amps: 2.4

  • OHMS: 50.5

  • Power Consumption: 300 Watts or less/ Thermostatically controlled

  • Power Requirement: 110/120 Volts

  • Weight: 9oz
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    Guy G Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    December 2, 2023

    Works well

    Kent J Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    November 21, 2023

    Jeffrey T Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    May 5, 2023

    Magaero L Verified Purchase


    January 13, 2023

    This heater works great. It fit nicely on the bottom of my oil pan. The instructions were pretty limited, it could have been more clear how to install and configure, but it works very well. It heats up my engine in a couple hours.

    Chrystal L Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    February 16, 2022

    It did not fit engine O-360 as advertised, despite my A&P installing with me. Illustration definitely not to scale. Ordered heater 440, which should fit, at least based on the template.

    Scott J Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    December 28, 2021

    Easy installation. Works great so far.

    Morfitt J
    February 15, 2021

    I bought this for my 1979 Piper Warrior 0-320 and I was very happy with the perfect fit and EASY INSTALLATION!!!

    Paul R
    December 21, 2020

    The engine application guide recommended a model 441 for a Lycoming O-320, however it did not fit on my O-320-A2B. I returned it for a model 440 and it fit perfectly.

    Miles K Verified Purchase

    E-Z HEAT ENGINE HEATER 441 110V/120V

    December 23, 2021

    I bought the 441 recommended for an O-320B, which is mounted on our RV6a. But I cant make it fit and remove the paint without removing all the carb controls and bracket. Very awkward installation, and thus I may not mount it at all. I would have preferred a smaller rectangle that fits into the open space on the pan even if the heating rate was reduced. Also, the cord on the 441 projects forward on the O-320, and I dont see an easy way to tie it clear of the exhaust pipes. I have one of these on the remote oil tank on my Fairchild 24W, which works great, thus Im disappointed.

    David H
    October 28, 2020


    Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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