| Business | Phone |
| Airtron Corp Smithtown 11787 | (631) 361-6998 |
| Jamar Environmental Systems 2 Argyle Pl, Smithtown 11787 | (631) 864-3879 |
| Thermal Solutions Inc 17 Neil Dr, Smithtown 11787 | (631) 366-0550 |
| Varsity Plumbing & Heating Smithtown 11787 | (631) 265-1900 |
| Zamco Service Systems 11 Foothill Ln, Smithtown 11787 | (631) 543-0422 |