The Draft Inducer creates consistent draft in the exhaust on your waste oil boiler. We provide a Tjernlund model sized to your boiler application. There are three models recommended: Model D-3 for BTU sizes up to 300K, Model I for sizes up to 700k, and Model IL for larger. A side vent model is available but requires at least a 20% de-rate on the boiler. Call for details.