Which you always have to do in the Spanish class
OR
What do you always have to do in the Spanish class (if with a question-mark)
It means "What do you always have to do in Spanish class?"
ask sib from WAVE 52!! wehh? (ile) paniwrsh! nononono ask LEY THE IMBA lols nononono ctrl + H + ENTER
HVAC (Heating, Ventilation, and Air Conditioning) refers to technology of indoor or automotive environmental comfort. HVAC system design is a major subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).