| Business | Phone |
| Aaron's Heating & Cooling 394 S Lake Dr, Watertown 57201 | (605) 882-5982 |
| Active Heating & Air Cond Inc 115 N Maple, Watertown 57201 | (605) 882-2663 |
| Andor Inc 9 N Maple, Watertown 57201 | (605) 886-2457 |
| Dave's Heating & Air Condition 626 11th Ave Se, Watertown 57201 | (605) 886-5472 |
| Fire & Ice Heating & Air 44682 Us Highway 212, Watertown 57201 | (605) 882-8361 |
| Hartwig Heating & Sheet Metal 107 4th St Sw, Watertown 57201 | (605) 886-5506 |
| Lonny's Service 1306 13th Ave Se, Watertown 57201 | (605) 882-3246 |