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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Wallace S Lewis Jr | Westerly, RI | — | Installer | 5749 |
| Walter Aniskoff Jr | Windsor, CT | — | Installer | 1726 |
| Walter Bennett Jr | New Preston, CT | — | Installer | 3797 |
| Walter D Hewins Iii | Ashley Falls, MA | — | Installer | 3537 |
| Walter D Hewins Iv | Ashley Falls, MA | — | Installer | 6161 |
| Walter H Held | Jewett City, CT | — | Installer | 1976 |
| Walter J Mattera | Westport, CT | — | Installer | 3104 |
| Walter J Woycik | Mystic, CT | — | Installer | 2213 |
| Walter J. Galko | Prospect, CT | — | Installer | 5804 |
| Walter Kozikowski | Bristol, CT | — | Installer | 2381 |
| Walter Lewis Jr | Clinton, CT | — | Installer | 2559 |
| Walter R Archer Iii | Oxford, CT | — | Installer | 5640 |
| Walter S Champagne Jr | North Granby, CT | — | Installer | 6236 |
| Walter Wanagel | Lisbon, CT | — | Installer | 2871 |
| Warren E Kimball | Woodbury, CT | — | Installer | 2906 |
| Warren E Luciani | Woodbridge, CT | — | Installer | 5517 |
| Warren H Kelley | Altoona, FL | — | Installer | 3627 |
| Warren Ramey | Danbury, CT | — | Installer | 2382 |
| Wayne A Landon | Hampton, CT | — | Installer | 3540 |
| Wayne Benjamin | Preston, CT | — | Installer | 3929 |
| Wayne Burritt | Redding, CT | — | Installer | 2685 |
| Wayne C Williams | Stafford Springs, CT | — | Installer | 1951 |
| Wayne G Linsley | Killingworth, CT | — | Installer | 5851 |
| Wayne J Hawkins | Sterling, CT | — | Installer | 5660 |
| Wc J Conlin | East Canaan, CT | — | Installer | 5677 |
| Wesley C Hanscome | Bethany, CT | — | Installer | 6334 |
| Wesley Dayton | Trumbull, CT | — | Installer | 5029 |
| Wesley Hills | East Windsor, CT | — | Installer | 1133 |
| Westford Lirot | Ashford, CT | — | Installer | 6058 |
| Whitney C Watts | Cheshire, CT | — | Installer | 6203 |
| Wilhelm H Voelkel Jr | Killingworth, CT | — | Installer | 3642 |
| William A D'Amico | Plainville, CT | — | Installer | 5397 |
| William C Gawel | Kent, CT | — | Installer | 78 |
| William C Gawel Jr. | Kent, CT | — | Installer | 5489 |
| William C Lyons | Madison, CT | — | Installer | 5591 |
| William C Maurer | Trumbull, CT | — | Installer | 6094 |
| William Ciola | Orange, CT | — | Installer | 2836 |
| William D Griffin | Shelton, CT | — | Installer | 1848 |
| William Dexter | Georgetown, CT | — | Installer | 2553 |
| William Disotell | Guilford, CT | — | Installer | 2344 |
| William E Gozzi | Guilford, CT | — | Installer | 5713 |
| William E Harbinson | Tolland, CT | — | Installer | 6335 |
| William E Keiser Jr | West Redding, CT | — | Installer | 3220 |
| William F Eichner | Torrington, CT | — | Installer | 3094 |
| William F Gotthardt Jr | Danbury, CT | — | Installer | 789 |
| William F Linkovich | East Canaan, CT | — | Installer | 5931 |
| William F Mitchell | South Windsor, CT | — | Installer | 1789 |
| William F Rodman | Canterbury, CT | — | Installer | 1946 |
| William F Torrant | Litchfield, CT | — | Installer | 2615 |
| William F Weingart | Sundown, NY | — | Installer | 5427 |
| William G Colby | Goshen, CT | — | Installer | 5838 |
| William G Koennicke | Glover, VT | — | Installer | 1326 |
| William Geer | Ledyard, CT | — | Installer | 5369 |
| William Griffin | Seymour, CT | — | Installer | 6031 |
| William Hebebrand | West Suffield, CT | — | Installer | 3010 |
| William Howard Chupp | Griswold, CT | — | Pumper / Cleaner | 5372 |
| William J Beach | West Granby, CT | — | Installer | 3836 |
| William J Coffey | Brookfield, CT | — | Installer | 2163 |
| William J Dunn | Prospect, CT | — | Installer | 5000 |
| William J Harding Ii | Norwalk, CT | — | Installer | 5599 |
| William J Linkovich | East Canaan, CT | — | Installer | 5930 |
| William J Marek | Bethany, CT | — | Installer | 3914 |
| William J Pieniadz | Oakdale, CT | — | Installer | 3808 |
| William J Roy | Botsford, CT | — | Installer | 5195 |
| William J Roy Jr. | Monroe, CT | — | Installer | 5861 |
| William J Walsh Jr | Norwalk, CT | — | Installer | 5300 |
| William Joseph Vorra Iii | North Stonington, CT | — | Installer | 6380 |
| William L Bond | Uncasville, CT | — | Installer | 5823 |
| William L Gilbert | Harwinton, CT | — | Installer | 5845 |
| William L Mastro | Newtown, CT | — | Pumper / Cleaner | 3909 |
| William L Schmidt | Waterford, CT | — | Installer | 6563 |
| William L Sima Iii | Tolland, CT | — | Installer | 6283 |
| William Langer | Barkhamsted, CT | — | Installer | 3995 |
| William M Riebold | Higganum, CT | — | Installer | 1001 |
| William M Sweeney | Winsted, CT | — | Installer | 6190 |
| William N Sioholm Jr | Wallingford, CT | — | Installer | 5331 |
| William P Allard Jr | Griswold, CT | — | Installer | 5965 |
| William P Foran Jr. | East Hartford, CT | — | Installer | 5544 |
| William P Ozarowski Jr | Wallingford, CT | — | Installer | 1495 |
| William P Raff | Marlborough, CT | — | Installer | 6095 |
| William R Grieger | Bethany, CT | — | Installer | 2838 |
| William R Hall Jr | Fairfield, CT | — | Installer | 3244 |
| William R Phillips | Bolton, CT | — | Installer | 3666 |
| William S Coffey | Brookfield, CT | — | Installer | 3816 |
| William Segalla | Canaan, CT | — | Installer | 6153 |
| William Strain | Indian Lake, NY | — | Installer | 6177 |
| William Stronkowsky | Morris, CT | — | Installer | 2544 |
| William T O'Boy Jr. | Bethel, CT | — | Installer | 5137 |
| William W Rand | East Hampton, CT | — | Installer | 3294 |
| Wilson A Caguana | Madison, CT | — | Installer | 6431 |
| Wilson S Oliveria | Danbury, CT | — | Installer | 5474 |
| Wyatt J Crotta | Bethany, CT | — | Installer | 2317 |
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