| Business | Phone |
| A & L Refrigeration 102 Scenic View Dr, Guilford 6437 | (203) 457-0207 |
| Aaa Plumbing Heating & Air Guilford 6437 | (203) 453-8817 |
| Air Dynamics Inc 5090 Durham Rd, Guilford 6437 | (203) 457-0853 |
| R & B Air Conditioning & Htg 18 Graves Ave, Guilford 6437 | (203) 453-6831 |
| East River Energy 401 Soundview Rd, Guilford 6437 | (203) 453-1200 |
| Energy Air 204 Sperry Dr, Guilford 6437 | (203) 453-8354 |