This website is intended to provide general information and does not provide all the required specific information to properly select/size a blower heater or vent fan model. There are many variables to consider when selecting/sizing a blower heater or vent fan model and we do suggest you contact us directly to ensure you get the right product for your application.

Dexon regulated velocity electric blower heaters provide positive pressure safety ventilation to pumping station wet wells, dry wells, buildings, vaults, and chambers for the safety of the operator and to provide a dryer less, corrosive environment for equipment where filtration is required. They will maintain both an adjustable preset discharge temperature and an adjustable preset airflow velocity by compensating for obstructions to intake or discharge air.

IMPORTANT: Dexon Blower Heaters are NOT INTENDED TO PROVIDE HEATING but to temper the incoming air to mitigate the risk of freezing the ventilated space.

All Dexon regulated velocity blower heaters are CSA Certified and designed to meet the requirements of the Canadian Electrical Code.

They are available in 1 or 3 phase and 120/208, 120/240, 120/480 or 120/600 voltages.

Please Note: These units are designed to be run continuously; failure to do so may void warranty. Dexon will not be liable for any personal injuries, equipment or property damage caused by inappropriate installation or operation.

CSA Certification

All regulated velocity blower heaters are CSA Certified for Ordinary Locations & for Class 1, Division 2, Gas Groups C & D Locations. Outdoor freestanding units are certified for Enclosure Type 3R.

CSA Certification for Ordinary Locations is identified by a”-1″ at the end of the model number. If a “-1” is not present the unit will be CSA Certified for Class 1, Division 2 Locations.


SRVDH5-1: This unit is rated for ordinary locations

SRVDH5: This unit is rated for Class 1, Division 2 Locations