Technical Specifications Flashcards

Under ASHRAE 62.1, what is the zone air distribution effectiveness (Ez) for ceiling supply of cool air with ceiling return?

Answer: 1.0

Table 6.2.2.2 assigns Ez = 1.0 to ceiling supply of cool air with ceiling return.

Which ASHRAE 90.1 compliance path uses Appendix G to compare a proposed design against a baseline building?

Answer: Performance Rating Method

Appendix G's Performance Rating Method is also used for LEED energy credits and code compliance in recent editions.

ASHRAE 52.2 groups test particles into ranges. Which size range is E1?

Answer: 0.3 to 1.0 µm

E1 covers the smallest particles, 0.3 to 1.0 µm; E2 covers 1.0 to 3.0 µm and E3 covers 3.0 to 10.0 µm.

In ASHRAE Standard 55, operative temperature in a space with low air speed is roughly equal to what?

Answer: The average of air temperature and mean radiant temperature

At low air speeds, operative temperature is about the mean of the dry-bulb air temperature and the mean radiant temperature.

ASHRAE 90.1 climate zone assignments are defined in which ASHRAE standard?

Answer: Standard 169

ASHRAE 169 provides the climatic data and climate zone definitions that 90.1 references.

R-32, a common replacement for R-410A, has which ASHRAE Standard 34 safety classification?

Answer: A2L

R-32 has lower toxicity and is mildly flammable, so it is classified A2L.

ASHRAE 90.1 (2016/2019) requires demand-controlled ventilation in spaces over 500 ft² with a design occupancy of at least how many people per 1,000 ft²?

Answer: 25

DCV is required where design occupancy is 25 or more people per 1,000 ft², subject to listed exceptions.