Air Quality & HVAC Manufacturers

Explore manufacturers of air quality sensors, transmitters, controls, and HVAC equipment. AirAlign organizes manufacturer information around product capabilities, technologies, applications, and official technical resources.

Browse Manufacturers by Product Area

Use these product areas to identify manufacturers relevant to a specific measurement, control, or HVAC application.

Sensor Manufacturers

Manufacturers of sensors for CO₂, O₂, particulate matter, VOCs, temperature, humidity, and other environmental measurements.

HVAC Controls & Automation Manufacturers

Manufacturers of room thermostats, HVAC controllers, building controls, and related devices for climate and ventilation control.

Air Conditioning Manufacturers

Manufacturers of air conditioners and reverse-cycle split systems, with official technical product references.

Ventilation Manufacturers

Manufacturers of heat-recovery, energy-recovery and balanced fresh-air ventilation units.

Air Handling Unit Manufacturers

Modular, packaged, heat-recovery and specialist air handling unit manufacturers.

Transmitter Manufacturers

Pressure, air velocity, CO₂, oxygen, humidity, temperature and VOC transmitter suppliers.

Manufacturer Directory

Browse AirAlign manufacturer profiles to understand what companies make, which applications they serve, and where to find their official technical resources.

Browse published manufacturer profiles below. These links lead directly to AirAlign manufacturer information; directory presence does not imply an exhaustive portfolio or product certification.

Sensor & Gas Detector Manufacturers (50)

Transmitter Manufacturers (18)

HVAC Controls & Automation Manufacturers (18)

Air Conditioning Manufacturers (6)

Ventilation Manufacturers (4)

Air Handling Unit Manufacturers (3)

Calibration & Metrology (2)

VCT Ltd — FPG instrument manufacturer · Qrometric — calibration supplier / distributor

What You’ll Find in a Manufacturer Profile

Each profile follows a consistent structure designed to make manufacturer research clearer and easier to compare.

  • Company Overview — a concise, factual introduction to the manufacturer and its relevant markets.
  • Product Categories — the air quality, control, and HVAC product areas covered by the manufacturer.
  • Key Technologies — relevant sensing, measurement, control, communication, and HVAC technologies.
  • Applications — typical building, HVAC, industrial, residential, or environmental applications.
  • Products by Manufacturer — AirAlign-listed products from the manufacturer, automatically associated with the manufacturer profile as product coverage expands.
  • Product Highlights — selected product families or notable products where useful.
  • Official Resources — official websites, catalogs, technical documentation, and other primary resources.
  • Related AirAlign Content — relevant guides, comparisons, reviews, and product-category coverage.

Calibration & Metrology Manufacturers & Suppliers

VCT Ltd — original manufacturer of the FPG dew/frost-point calibrators.

Qrometric — humidity calibration services and equipment distributor; exclusively markets VCT-built FPG products. Manufacturers and distributors are listed with their distinct roles.