Can an EE system heat a building without supplemental heat?
A system can be designed to provide 100% of heating needs on the coldest days in northern Canada, but the cost to install such a system would be excessively high. A system designed to provide 70% of a calculated heat load is the optimal sizing if there is a supplemental heating element, but there were past errors in calculating the heat loss and, consequently, some systems were under-sized. The new CSA standard for installation (C448) has been revised to overcome this deficiency.
