| Business | Phone |
| John R Gilchrist & Son Plbg 260 Lake St, Oak Park 60302 | (708) 848-1836 |
| Oak Park Plumbing 1044 S Ridgeland St, Oak Park 60302 | (708) 848-3737 |
| Roto-Rooter Plumbing & Drain Oak Park 60302 | (708) 848-3311 |
| Spannuth Boiler Co 264 Madison St, Oak Park 60302 | (708) 386-1882 |
| House Of Heat 336 Harrison St, Oak Park 60304 | (708) 848-3291 |
| Peoples Energy 1131 Lake St 206, Oak Park 60301 | (708) 445-7550 |
| Artisan Heating Cooling 161 Ontario, Oak Park 60302 | (708) 301-3773 |
| Coolastik Heating & Cooling Oak Park 60302 | (708) 935-6293 |
| Hansen Mechanical Oak Park 60302 | (708) 386-0306 |
| Skip's Heating & Air Oak Park 60302 | (708) 848-1818 |
| Tri-City Service Ctr Inc Oak Park 60302 | (708) 383-6520 |
| J C Geyer Plumbing Co 1103 Garfield St, Oak Park 60304 | (708) 386-0333 |
| Sutor Heating & Cooling 947 Wisconsin Ave, Oak Park 60304 | (708) 383-9600 |
| Wakenight & Associates PC 1144 Lake St., Suite 206, Oak Park 60301 | (708) 848-3159 |