AirFixture Blog
Glossary (2)
![](https://airfixture.com/hubfs/airfixture-glossary-featured.jpg)
Explaining Sound Transmission Class
The sound transmission class (STC) is an integer rating for measuring and classifying how well a building wall or structure controls or reduces sound.
![](https://airfixture.com/hubfs/airfixture-glossary-featured.jpg)
Explaining BAS HVAC
BAS HVAC refers to the systems necessary for connecting your HVAC system to your wider building automation system (BAS). Specific BAS HVAC components...
![](https://airfixture.com/hubfs/Imported_Blog_Media/what-is-ahu-1024x794-1.jpg)
What is AHU?
‘AHU’ is short for ‘air handling unit.’ It is a system that warms-up, cools, filters, and/or humidifies as well as circulates air in your home or...
![](https://airfixture.com/hubfs/airfixture-glossary-featured.jpg)
Explaining Inches of Water Column (Inch WC)
Inches of water column (inch WC) is a measurement unit for measuring static pressure. It’s a key metric for determining how much resistance air must...
![](https://airfixture.com/hubfs/airfixture-glossary-featured.jpg)
What is Stratified Air?
Stratified air -- also known as thermal stratification -- occurs when cool, dense air sinks while the warm and thin air rises.
![](https://airfixture.com/hubfs/Imported_Blog_Media/Diffuser-Grilles-1.png)
What are Diffuser Grilles?
Diffuser grilles are the outer frames you can use to enclose your variable air volume (VAV) or air supply diffusers.
![](https://airfixture.com/hubfs/airfixture-glossary-featured.jpg)
Explaining Environmental Controls
An environmental control device is an instrument that equips the end-user to control the area’s heating and cooling. This can be at the macro-level...
![](https://airfixture.com/hubfs/Imported_Blog_Media/Supply-Diffuser-1.png)
What is a Supply Diffuser?
In HVAC systems, the air supply diffuser is a device that delivers and ventilates conditioned air in an area, mixes indoor air, and manages air...