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When is DCSV required?

When occupant density is less than or equal to 40 square feet per person.


When is OCV required?

Office less than or equal to 250 sf., multipurpose rooms less than 1,000 sf, classrooms (other than K-12) conference rooms of any size.


What are some exceptions for electric space heating?

1) When used to supplement heating when at least 60% energy requirement is solar.
2) When used to supplement a heat pump whose heating capacity is more than 75% of the design heating load.
3) Emergency backup to gas heating equipment.