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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Nathan R Cyr | Griswold, CT | — | Installer | 6393 |
| Nathan Roden | Middlefield, CT | — | Installer | 5065 |
| Nathanial Louis Koniecko | Preston, CT | — | Installer | 6505 |
| Nathaniel Gene Robida | Chester, CT | — | Installer | 6491 |
| Nathaniel Wrona Lytwyn | Willington, CT | — | Installer | 6391 |
| Neil H Swanson | Cromwell, CT | — | Installer | 3475 |
| Neil Hilpl | Cross River, NY | — | Installer | 3202 |
| Nicholas A Mahoney | Winsted, CT | — | Installer | 6444 |
| Nicholas A Searles | Monroe, CT | — | Installer | 5778 |
| Nicholas Alexander Marouski | Willimantic, CT | — | Pumper / Cleaner | 5670 |
| Nicholas Barry | Dayville, CT | — | Installer | 6264 |
| Nicholas C Xenelis | Middlefield, CT | — | Installer | 3518 |
| Nicholas Casertano | Meriden, CT | — | Pumper / Cleaner | 5048 |
| Nicholas Casertano | Meriden, CT | — | Installer | 3817 |
| Nicholas E Anderson | Madison, CT | — | Installer | 6407 |
| Nicholas Fischer | Branford, CT | — | Installer | 3416 |
| Nicholas Grammatico | New Milford, CT | — | Installer | 3745 |
| Nicholas J Carbone | Hartsdale, NY | — | Pumper / Cleaner | 5444 |
| Nicholas J Marek | Bethany, CT | — | Installer | 6001 |
| Nicholas L Bowen | Woodstock Valley, CT | — | Installer | 5806 |
| Nicholas Mastracchio | Hamden, CT | — | Installer | 2930 |
| Nicholas Matthew Schadtle | Marlborough, CT | — | Installer | 6481 |
| Nicholas Michael Wrona Lytwyn | Willington, CT | — | Installer | 6482 |
| Nicholas Murphy | Haddam, CT | — | Installer | 6232 |
| Nicholas Olson | Deep River, CT | — | Pumper / Cleaner | 5508 |
| Nicholas Olson | Deep River, CT | — | Installer | 6230 |
| Nicholas P Zimmerman | Durham, CT | — | Installer | 6017 |
| Nicholas Picard | Manchester, CT | — | Installer | 6405 |
| Nicholas S Bell | Weston, CT | — | Installer | 2964 |
| Nicholas S Hany | Tolland, CT | — | Installer | 5980 |
| Noel A Carrier | Unionville, CT | — | Installer | 5446 |
| Noel Bienvenue | Franklin, CT | — | Installer | 2538 |
| Norman G Wood | New London, CT | — | Installer | 3383 |
| Norman H Eccleston Jr | Griswold, CT | — | Installer | 6106 |
| Norman Nagy | Newtown, CT | — | Installer | 2952 |
| Norman S Watson | South Windham, CT | — | Installer | 6030 |
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