Who is Hamilton Engineering Hamilton Engineering was founded in 1981 to serve markets that require special water heating and building heat applications. Since its inception, the company's philosophy has remained unchanged: to provide the customer with the highest quality water heaters and hydronic boilers at a competitive price, and to give the best attainable service and sales support in every industry the company serves. Hamilton Engineering's primary line is the EVO family of high efficiency condensing water heaters, boilers, and pool heaters that are up to 99.8% efficient. These models range from 79, 000 BTU's to 2, 000, 000 BTU's per unit, and can be combined to provide an enormous range of BTU outputs. We also offer a line of copper finned products that range in size from 45, 000 to 2, 070, 000 BTU's, with efficiencies ranging from 81% to 85%. Our varied product lines help us to provide the right system and the right price for any budget!