HKL
HVAC is an acronym for:
- Cardiovascular disease
- Line with direct contact with the enemy during the war, see War Front # main line (HVAC )
- Main battle line, right-wing band
- Helsingin Kaupungin liikennelaitos, the transport companies of the Finnish capital Helsinki
- Heating, ventilation, air conditioning (see also HVAC system); Collective term in air conditioning technology
- Mark, or grade: Categorization for sensitive or perishable goods
- Frequency class, a term used in linguistics
- A hollow cathode lamp
- Country of origin
- HVAC Construction GmbH
- Cardiac catheterization laboratory, cardiac catheter measurement
Hkl is the abbreviation for:
- Miller indices. They are used in crystallography the unique designation of crystal faces or planes in the crystal lattice.
- Disambiguation
- Abbreviation