| Business | Phone |
| Johnson's Boiler & Control Inc 2440 S Gearhart Ave, Fresno 93725 | (559) 237-7772 |
| Vassar Mechanical Inc 3711 S Bagley Ave # 103, Fresno 93725 | (559) 233-8770 |
| Moehlman Boiler Technology 149 Fulton St, Fresno 93721 | (559) 237-1585 |
| Energy Resources 340 W Fallbrook Ave # 105, Fresno 93711 | (559) 438-4383 |