Products & Manufacturers / Buying Guides

Product Buying Guides

Explore independent buying and product-selection guides across AirAlign. Each guide explains compatibility, performance data, application limits, installation, maintenance and a checklist for procurement decisions. Guides link back to relevant product listings.

48 available buying guides including the original Room Thermostats guide.

Sensors

Technology, measurement performance, integration and calibration.

Sensors — OverviewRead Buying Guide →CO₂ SensorsRead Buying Guide →NDIR CO₂ SensorsRead Buying Guide →Photoacoustic CO₂ SensorsRead Buying Guide →Thermal Conductivity CO₂ SensorsRead Buying Guide →O₂ SensorsRead Buying Guide →PM2.5 SensorsRead Buying Guide →PM10 SensorsRead Buying Guide →VOC SensorsRead Buying Guide →Temperature SensorsRead Buying Guide →Humidity SensorsRead Buying Guide →

Transmitters

Installed measurement, engineering outputs, site conditions and BMS integration.

Transmitters — OverviewRead Buying Guide →Differential Pressure TransmittersRead Buying Guide →Air Velocity TransmittersRead Buying Guide →CO₂ TransmittersRead Buying Guide →O₂ TransmittersRead Buying Guide →Temperature TransmittersRead Buying Guide →Humidity TransmittersRead Buying Guide →VOC TransmittersRead Buying Guide →

Controls & HVAC Equipment

System compatibility, control strategies, efficiency and commissioning.

Controls & HVAC Equipment — OverviewRead Buying Guide →Room ThermostatsRead Buying Guide →Air Conditioners — OverviewRead Buying Guide →Split System Air ConditionersRead Buying Guide →Multi-Split Air ConditionersRead Buying Guide →Portable Air ConditionersRead Buying Guide →Window Air ConditionersRead Buying Guide →Cassette Air ConditionersRead Buying Guide →Ducted Air ConditionersRead Buying Guide →Indoor UnitsRead Buying Guide →HVAC Controllers — OverviewRead Buying Guide →Programmable HVAC Controllers (DDC)Read Buying Guide →AHU ControllersRead Buying Guide →VAV ControllersRead Buying Guide →Fan Coil Unit ControllersRead Buying Guide →Plant & Chiller ControllersRead Buying Guide →Supervisory ControllersRead Buying Guide →Ventilation Units — OverviewRead Buying Guide →Heat Recovery Ventilators (HRV)Read Buying Guide →Energy Recovery Ventilators (ERV)Read Buying Guide →Whole-House MVHR UnitsRead Buying Guide →Commercial Heat Recovery VentilationRead Buying Guide →Air Handling Units — OverviewRead Buying Guide →Modular Air Handling UnitsRead Buying Guide →Compact & Packaged AHUsRead Buying Guide →Heat Recovery AHUsRead Buying Guide →Hygienic & Specialized AHUsRead Buying Guide →Integrated Heat Pump AHUsRead Buying Guide →

Manufacturers

Validate documentation, lifecycle status, service support and vendor traceability.

How to Evaluate Air Quality and HVAC ManufacturersRead Buying Guide →
How to use these guides: First choose the application and equipment category. Follow the guide’s specification and compatibility checklist, then open the individual product profiles to verify model-specific manufacturer documentation. Supplier data and safety requirements take priority over generic editorial advice.

AirAlign independent buying guide library · October 2026. These guides are informational and do not replace engineering design, regulatory requirements or manufacturer manuals.