
1) Climate control syst 2) Sort of rooftop unit
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https://www.crosswordclues.com/clue/hvac

HVAC (heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is...
Found on
http://en.wikipedia.org/wiki/HVAC

Heating Ventilating and Air Conditioning
Found on
http://www.contractorsunlimited.co.uk/glossary.shtml

Heating Ventilation and Air Conditioning,
details ...Found on
http://www.cryer.co.uk/glossary/h/index.htm

Heating, ventilation and air conditioning.
Found on
http://www.edmunds.com/glossary/

Heating Ventilation and Air Conditioning.
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http://www.encyclo.co.uk/local/20933

Heating Ventilation and Air Conditioning.
Found on
http://www.encyclo.co.uk/local/21074

Heating, ventilation, and air conditioning (conservation)
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http://www.translationdirectory.com/glossaries/glossary136.htm

Heater-Vent-Air Conditioning
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http://www3.sympatico.ca/dhaughey/j1930.htm

Abbreviation used to signify the heating, ventilation and cooling structures and systems of the building.
Found on
https://1build.com/blog/construction-terms/

An abbreviation that stands for heat, ventilation, and air conditioning.
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https://blog.capterra.com/handy-construction-glossary-common-terms-defined/

An abbreviation for the subsection of construction which includes heating, ventilation, and air conditioning. Photo By SB7 on Shutterstock
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https://groundbreakcarolinas.com/50-construction-terms-every-construction-m

(CONTROL SYSTEMS GLOSSARY) Heating, Ventilation and Air Conditioning.
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https://www.encyclo.co.uk/local/20479

Heating, Ventilation and Air-conditioning
Found on
https://www.encyclo.co.uk/local/20849

Heating, ventilation & air conditioning. HVAC equipment is rated on the capacity of the unit in BTUs per hour.
Found on
https://www.encyclo.co.uk/local/21672

Heating, Ventilation and Air Conditioning; a home's heating and cooling system.
Found on
https://www.encyclo.co.uk/local/21674

Heating, ventilation & air conditioning. HVAC equipment is rated on the capacity of the unit in BTUs per hour.
Found on
https://www.encyclo.co.uk/local/23103

The equipment, terminals, and distribution systems that provide, either collectively or individually, the processes of heating, ventilating, or air conditioning to a building or portion of a building. Basically, the setup of machines that make a room or space warmer, cooler, or more conditioned in some regard.
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https://www.fieldwire.com/resources/construction-glossary/

heating, ventilating, and air conditioning.
Found on
https://www.infoplease.com/dictionary/hvac
No exact match found.