| # | Name | Location | Applications |
|---|---|---|---|
| 1. | BTU Comfort Systems, LLC. | 🇺🇸 Prescott, AZ, United States | 1 |
| 2. | BTU International, Inc. | 🇺🇸 No. Billerica, MA, United States | 5 |
| 3. | BTU International, Inc. | 🇺🇸 N. Billerica, MA, United States | 17 |
| 4. | BTU International, Inc. | 🇺🇸 North Billerica, MA, United States | 11 |
| 5. | BTU International, Inc. | 🇺🇸 Westford, MA, United States | 1 |
| 6. | BTU RESEARCH LLC | 🇺🇸 Houston, TX, United States | 7 |
| 7. | BTU RESEARCH LLC | Houston, un | 1 |