NUMERICAL APTITUDE: Requires the ability to utilize mathematical formulas; add and subtract totals; multiply and divide; utilize and determine percentages, interpret graphs; compute discount, interest, profit and loss, ratio and proportion, etc; perform calculations involving variables, formulas, square roots, and polynomials; perform statistical calculations; perform algebraic operations. Duties and responsibilities include, but are not limited to, assisting with all HVAC services, calculating heat gains/losses, designing duct units, inspecting HVAC for code compliance, and performing additional tasks as assigned.