Office of General Services

New York State Office of General Services

Approved EO4 Specifications

Engine Block Heaters

Covered Products

Engine block heaters for use in vehicles equipped with diesel engines.


Engine Block Heater: an electric heater that heats the engine of a vehicle to ease starting in cold weather.


It is recommended that all diesel-fueled vehicles include engine block heaters or other warming technologies to reduce fuel consumption, decrease pollution, extend the engine life, and create reliability with cold-start operation. The engine block heater shall be UL approved (Underwriters Laboratory Inc.), and sized and installed as per the manufacturer's recommendations.

For diesel-fueled vehicles that were purchased prior to this recommendation, please refer to the vehicle manufacturer for retrofits.