| Business | Phone |
| A & M Heating & Air Cond Po Box 278, Alta Loma 91701 | (909) 941-3010 |
| Acr Engineering Inc 9314 Golden St, Alta Loma 91737 | (909) 466-0203 |
| Ameriair Services Htg & Air 6166 Filkins Ave, Alta Loma 91737 | (909) 466-1882 |
| Amko Air Conditioning & Heatng 9819 Summerhill Rd, Alta Loma 91737 | (909) 625-7473 |
| Certified Air Conditioning 8091 Sunflower Ave, Alta Loma 91701 | (909) 989-7401 |
| Mst Air Conditioning & Heat 11374 Windhaven Ct, Alta Loma 91701 | (909) 944-8933 |
| Ras Indoor Environmental Svc 6235 Gamay Ct, Alta Loma 91737 | (909) 466-3620 |
| Ron's Refrigeration 9363 19th St, Alta Loma 91701 | (909) 945-0566 |
| S I Rosati Air Conditioning Po Box 1122, Alta Loma 91701 | (909) 987-7000 |
| Soco Air Conditioning 6892 Carnelian St, Alta Loma 91701 | (909) 944-1340 |
| Stemme Air Systems 6798 Vanderbilt Pl, Alta Loma 91701 | (909) 466-9020 |
| AM Electric Services 6780 shaded wood place, Alta Loma 91701 | (909) 354-1879 |