DEEP headquarters at 79 Elm Street in Hartford is currently closed due to recent water damage impacting multiple areas of the building. We are working to remediate the situation and get the building back open to staff and the public as soon as possible. While the building is closed, Staff continue to work either remotely or in alternate locations. We continue to be able to receive documents via U.S. Mail or courier service, and our electronic file submittal protocols remain unchanged. For updates, please click here

What is your engine category?

Please click on one of the links below. A corresponding video will play.

 Emergency Compression Ignition  Non-emergency compression ignition, rated between 300 and 500 horsepower
 Non-emergency compression ignition, rated less than or equal to 300 horsepower  Emergency Spark Ignition
 Non-emergency spark ignition 4-stroke lean burn  Non-emergency spark ignition 2-stroke lean burn
 Non-emergency spark ignition 4-stroke rich burn  Non-emergency landfill or digester gas
 Residential, commercial or institutional emergency engine  

 

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