| Business | Phone |
| Airtemp Chiller & Air Cond Po Box 2340, Lakeside 92040 | (619) 561-7275 |
| All-Pro-Air Lakeside 92040 | (619) 390-2247 |
| Calwest Mechanical 12342 Mapleview St, Lakeside 92040 | (619) 443-6107 |
| Fire & Ice Heating & Air Cond 9911 Maine Ave, Lakeside 92040 | (619) 561-8100 |
| Jim Butcher Heating & Air 10241 Paseo Palmas Dr, Lakeside 92040 | (619) 443-1470 |
| Pac Heating & Air Cond 9830 Vine St # 101, Lakeside 92040 | (619) 561-9163 |
| Pellegrino Heating & Air Cond Lakeside 92040 | (619) 390-4143 |
| Rendual Air 10742 Valle Vista Rd, Lakeside 92040 | (619) 561-5113 |
| Slayton Mechanical 9824 Vine St, Lakeside 92040 | (619) 390-4900 |
| Steve Bailey Air Cond Heating 9464 Palomino Ridge Dr, Lakeside 92040 | (619) 447-6467 |
| West Coast Air Conditioning Co 12365 Mapleview St, Lakeside 92040 | (619) 561-8000 |
| Western Mechanical Air Cond 9830 Vine St # 100, Lakeside 92040 | (619) 448-5222 |
| All American Heating & Cooling 8929 Gardena Way, Lakeside 92040 | (619) 443-0362 |