Paper Conference

Proceedings of eSim 2018: 10th Conference of IBPSA-Canada


Condensing Rooftop Units – A Canadian Cost-Benefit Study

Daniel Knapp

Abstract: This market research and simulation study, carried out for the Office of Energy Efficiency at Natural Resources Canada, analyzes the cost-benefit of adding condensing heat exchangers to rooftop units in NECB archetype buildings in Canada's climate zones. This study models and analyzes the addition of condensing furnaces to rooftop units alone and in combination with energy recovery and demand-controlled ventilation to understand the interactions and possible energy and cost savings when controls are optimized for the mix of technologies applied. Energy cost savings due to condensing furnaces are significant. However, payback periods are found to be longer than 10 years and the economics of the current market remain challenging. The primary barrier to the widespread adoption of condensing furnaces in rooftop units is the high cost of purchasing condensing rooftop units from specialized manufacturers who only offer condensing heat exchangers in premium packages.).
Keywords: cost-benefit, condensing heat, rooftop units, CAN-QUEST, NECB Canada, heating in rooftop units is predominantly provided
Pages: 222 - 231