| Business | Phone |
| Umphrey Engineering Llc 134 Middle St # 200, Lowell 1852 | (978) 441-9393 |
| Brothers Heating & Ac 120 Mount Washington St # 124, Lowell 1854 | (978) 275-0092 |
| Cool-Rite Mechanical Inc 1320 Middlesex St, Lowell 1851 | (978) 470-2215 |
| Delta T Distributors 790 Chelmsford St, Lowell 1851 | (978) 888-0800 |
| J W Clark 115 Rock St, Lowell 1854 | (978) 453-5031 |
| Joe Ayotte Heating & Air Cond 125 Newhall St, Lowell 1852 | (978) 452-5000 |