R-NY-3 Mechanical Systems Made Simple: HVAC Requirements in the 2025 ECCCNYS – PART 2

COURSE DESCRIPTION:

This course will examine the requirements for mechanical systems in Section R403 of the 2025 Energy Conservation Construction Code of New York State. Part 2 will cover the Manual S requirements outlined in Section R403.7 of the 2025 ECCNYS, explaining how following Manual S can both reduce energy bills and enhance comfort. According to a 2015-16 study on single-family residential homes, only 14% of homes meet the code requirement of designing mechanical equipment based on ACCA Manual S and Manual J. The discussion will include the ACCA design process, as well as the Manual J load calculation process and modeling, which is the first step in sizing equipment properly.

LEARNING OBJECTIVES:

1. Be able to explain why proper sizing of mechanical systems is important.

2. Compare and contrast Manuals J, S, and D reports

3. Identify common errors when reviewing manual J, S, and D reports

4. Calculate the minimum required flow rates for whole home balanced mechanical ventilation

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