Draft Minutes - September 26, 2024

Two of the members asked for their concerns with the use of a 26C outdoor temperature as the trigger to be noted in the minutes, since they had indicated that indoor temperatures are generally higher than outdoor temperatures.   

Revisions to PCF 2061 for the Standing Committee on Housing and Small Buildings Consideration

The Task Group reviewed responses to questions that had been submitted to Natural Resources Canada regarding PCF 1823 Maximum SHGC Based on Fenestration Area to Limit Overheating (responses included in the agenda package).  The main goal for today's meeting was to determine whether 5 or 10 kWh/m³ would be an appropriate trigger for overheating, since the Canadian Board for Harmonized Construction Codes had confirmed in their September 16th memo that "using a cooling load trigger to determine whether cooling facilities are required is a preferred approach over triggers using outdoor temperature alone". It was noted that these types of calculations would likely be carried out by energy advisors as opposed to mechanical contractors.   

In the end, they concluded it would be best to simply use the July dry bulb temperature of 26C as the determining factor (trigger) in order to meet the November 30th deadline imposed by the Canadian Board for Harmonized Construction Codes.  While the Task Group reached consensus on the use of a single trigger based on the outdoor design temperature, for now, some of the members did not agree with this approach.