Here are just a few of the companies that have relied on MECS to design and fabricate MECS-ThermoZ™ fully welded, plate air preheaters:

- ADM
- ExxonMobil
- Technip
- Air Products
- CB&I
- Tulsa Heaters
- Selas Fluid Processing
- Kellogg Brown & Root
- On Quest
- ConocoPhillips
- SC Machinex
- LPEC
- Sinopec YPC
- Jacobs Engineering
- Valero Energy
- Crown Iron Works
