| Business | Phone |
| A & E Commercial Air 34 Sullivan Rd # 35, North Billerica 1862 | (978) 663-1796 |
| T J Heating & Cooling 71 Faulkner St # 160, North Billerica 1862 | (978) 670-5664 |
| Crs Inc 243 Rangeway Rd, North Billerica 1862 | (978) 663-6664 |
| Ledlow Hvac 113 Treble Cove Rd, North Billerica 1862 | (978) 439-0297 |
| Hvac Engineering Inc 17 Sterling Rd, North Billerica 1862 | (978) 667-8100 |