Current Members
Installer Technician Accredited
Service Technician Accredited
Loop Installers Accredited
The GAOI offers its members an accreditation program. Click here for additional information on the program.
| Friend of the Industry (non-voting) | Joe Freitag Monmouth, IL 60062 |
|
| 20/10 Engineering Group, LLC | ||
| 1216 Tower Rd Schaumburg, IL 60173 Phone: 847-882-2010 Fax: 847-882-2201 Designer/Engineer/Architect | Website: http://www.2010engineering.com |
|
| 360 Energy Group, LLC | ||
| 125 S. Clark St. 17th Floor Chicago, IL 60603 Phone: 312-265-3971 Phone (alternate): 800-401-0360 Fax: 312-264-0657 Designer/Engineer/Architect | Website: http://www.360eg.com |
|
| A & O Heating And Air Conditioning Inc. | ||
| 1037 Garfield Ave. Aurora, IL 60506 Installing Contractor | ||
| A Polar Bear Air, LLC | ||
| 1210 Bloods Point Rd Cherry Valley, IL 61016 Phone: 815-544-5424 Installing Contractor | Website: http://www.apolarbearair.com |
|
| AA Service Co. Heating & Cooling | ||
| 550 Anthony Trail Northbrook, IL 60062 Phone: 847-729-7889 Installing Contractor | Website: http://www.aaserviceco.com |
|
| Advanced Geothermal Plumbing & Heating LLC | ||
| 326 Wilcox Ave Elgin, IL 60123 Phone: 847-695-1657 Installing Contractor | |
|
| Air-ease Heating & Cooling | ||
| 17390 Brennan Hwy. Tinley Park, IL 60477 Phone: 708-429-6550 Fax: 708-429-6553 Installing Contractor | Website: http://www.air-ease.com/ |
|
| Aire Serv Of Quincy | ||
| 301 South 7th Street Quincy, IL 62301 Phone: 217-221-1600 Installing Contractor | Website: http://aireserv.com/quincy |
|
| Architectural Consulting Engineers | ||
| 837 Hayes Ave Oak Park, IL 60302 Phone: 708-524-0272 Designer/Engineer/Architect | Website: http://www.ace-oakpark.com |
|
| Area Mechanical | ||
| 821 1st Ave Rockford, IL 61104 Phone: 815-964-2070 Fax: 815-964-2071 Mechanical Contractor | Website: http://www.areamechanical.com |
|
| Association Of Illinois Electric Cooperatives | ||
| 6460 S 6th Frontage Rd E PO Box 3787 Springfield, IL 62708 Phone: 217-529-5561 Coop/Municipal Utility - Lg | Website: http://www.aiec.coop |
|
| Bradley University | ||
| 1501 W Bradley Ave. Peoria, IL 61625 Phone: 3096772780 Educational (non-voting) | Website: http://www.bradley.edu/ |
|
| Bradley University, Peoria,IL | ||
| 3408, Horse Creek Rd Normal, IL 61761 Phone: 3182378135 Phone (alternate): 3182378135 Educational (non-voting) | ||
| Central Heating & A/C | ||
| #1 Robin Ln Pekin, IL 61554 Phone: 309-346-6100 Fax: 866-346-5510 Drilling Contractor/Loop Installer, Installing Contractor | Website: http://www.centralheatingair.com |
|
| College Of DuPage HVACR Program | ||
| 425 22nd St Glen Ellyn, IL 60137 Phone: 630-942-3068 Educational (non-voting) | ||
| Corn Belt Energy | ||
| One Energy Way Bloomington, IL 61705 Phone: 309-662-5330 Coop/Municipal Utility - Lg | Website: http://www.cornbeltenergy.com |
|
| Crossroads Geothermal Drilling | ||
| 15500 E State Hwy 33 PO Box 345 Teutopolis, IL 62467 Phone: 217-347-5755 Fax: 217-347-5715 Drilling Contractor/Loop Installer | |
|
| CWLP | ||
| 1008 E Miller St Springfield, IL 62702 Phone: 217-789-2070 Fax: 217-789-2210 Coop/Municipal Utility - Lg | Website: http://www.cwlp.com |
|
| Design Air | ||
| 1201 N 19th St Decatur, IL 62521 Phone: 217-429-1105 Fax: 217-475-0419 Installing Contractor | Website: http://www.designairhvac.com |
|
| Douglas County Health Department | ||
| 1250 E US Hwy 36 Tuscola, IL 61953 Phone: 217-253-3421 Fax: 2172533421 Educational (non-voting) | ||
| Duden & Silver Inc | ||
| 103 N Main St Gifford, IL 61847 Phone: 217-568-7954 Fax: 217-568-7305 Installing Contractor | ||
| Durbin Geothermal | ||
| PO Box 68 Beecher City, IL 62414 Phone: 618-487-5402 Fax: 618-487-5037 Drilling Contractor/Loop Installer | Website: http://www.letsdig.com |
|
| Eastern Illini Electric Co-op | ||
| 330 W Ottawa St Paxton, IL 60957 Phone: 800-824-5102 Phone (alternate): 217-379-2131 Fax: 217-379-2936 Coop/Municipal Utility - Lg | Website: http://www.eiec.coop |
|
| Edelman, Inc. | ||
| 19440 E 600 N Rd Fairbury, IL 61739 Phone: 815-692-2700 Phone (alternate): 815-692-4699 Fax: 815-692-4292 Installing Contractor | Website: http://edelmaninc.com |
|
| Edelman, Inc. | ||
| 3302 N. Mattis Ave. Champaign, IL 61822 Phone: 217-403-9663 Installing Contractor | Website: http://www.edelmaninc.com |
|
| Edgar County Public Health Department | ||
| 502 Shaw Ave Paris, IL 61944 Phone: 217-465-2212 Phone (alternate): 217-465-2212 Fax: 217-465-1121 Educational (non-voting) | ||
| Element Energy Consulting | ||
| 108 S Seminary Ave Park Ridge, IL 60068 Phone: 312-405-8401 Designer/Engineer/Architect | Website: http://www.element-co.com |
|
| Energy Specialists Co | ||
| 224 N Main St Toluca, IL 61369 Phone: 815-452-2332 Fax: 815-452-2496 Installing Contractor | Website: http://www.energy-specialists.com |
|
| EverGreen Home Energy Consultants | ||
| 2813 W. Westport Rd. Peoria, IL 61615 Phone: (309)253-2242 Associate | Website: http://www.evergreenhomeenergy.com |
|
| G.O. Loop | ||
| W11366 Blanecae Rd. Randolph, WI 53956 Phone: 920-326-2050 Fax: 920-326-2051 Drilling Contractor/Loop Installer |  Website: http://www.goloopwi.com |
|
| Geo-Mechanical | ||
| 301 S 7th Quincy, IL 62301 Phone: 217-222-5220 Drilling Contractor/Loop Installer | |
|
| Geothermal Eco Options, Inc | ||
| 407 2nd Ave., SW Cresco, IA 52136 Phone: 563-382-0300 Phone (alternate): 563-547-2871 Fax: 563-382-0305 Drilling Contractor/Loop Installer | Website: http://www.geo-inc.com |
|
| Geothermal Exchange Organization | ||
| 1050 Connecxticut Ave., NW, Ste. 1000 Washington, , DC 20036 Phone: 888-255-4436 Friend of the Industry (non-voting) | Website: http://www.geoexchange.org |
|
| Grasser's Plumbing And Heating | ||
| 404 W Main St McNabb, IL 61335 Phone: 815-882-2111 Phone (alternate): 815-882-2111 Fax: 815-882-2157 Installing Contractor | Website: http://www.grassersplumbing.com |
|
| GVS Contracting | ||
| 87 Bynum Rd Ozark, IL 62972 Phone: 618-924-0429 Phone (alternate): 618-551-2852 Drilling Contractor/Loop Installer | ||
| Hanson Professional Services | ||
| 1525 S Sixth St Springfield, IL 62703 Phone: 217-747-9215 Fax: 217-788-2503 Designer/Engineer/Architect | Website: http://www.hanson-inc.com |
|
| Hinrichsen Heating And Air Conditioning | ||
| 255 N Eureka St Goodfield, IL 61742 Phone: 309-965-2604 Installing Contractor | Website: http://www.hinrichsenheating.com |
|
| Hollaway-Meyer's Inc | ||
| 950 165th St Hammond, IN 46324 Phone: 219-932-2171 Phone (alternate): 708-895-8226 Fax: 219-932-3334 Mechanical Contractor | Website: http://www.hollaway-meyers.com |
|
| Houston Plumbing Heating Cooling | ||
| 111 N Market St Paxton, IL 60957 Phone: 217-379-2329 Fax: 217-379-2166 Installing Contractor | Website: http://www.houstonsplumbing.com |
|
| Hoveln Heating And Cooling, Inc | ||
| 903 N Church St PO Box 596 Thomasboro, IL 61878 Phone: 217-643-2125 Fax: 217-643-2128 Installing Contractor | Website: http://www.hoveln.com |
|
| Ilinois State Geological Survey | ||
| 615 East Peabody Drive Champaign, IL 61820 Phone: 2172446462 Educational (non-voting) | Website: http://isgs.illinois.edu |
|
| Illinois State University | ||
Normal, IL 61761 Educational (non-voting) | ||
| J & R Herra, Inc | ||
| 210 E. North St. Elburn, IL 60119 Phone: 630-365-6266 Installing Contractor | Website: http://www.jrherrageothermal.com |
|
| JACK WELLING INC | ||
| 10929 Franklin Ave STE U Franklin Park, IL 60131 Phone: 847-258-3277 Phone (alternate): 847-650-1664 Installing Contractor | Website: http://www.jackwellinginc.com |
|
| Jansen Heating, Air Conditioning & Electrical | ||
| 4341 Rolling Hills Freeport, IL 61032 Phone: 815-262-4373 Phone (alternate): 815-233-6231 Fax: 815-616-8675 Installing Contractor | Website: http://www.jansenhvac.com |
|
| Jeckel Plumbing & Heating, LLC | ||
| 115 E Third St, PO Box 21 Delavan, IL 61734 Phone: 309-244-8265 Phone (alternate): 309-369-2214 Fax: 309-244-7402 Installing Contractor | ||
| Jo-Carroll Energy, Inc (NFP) | ||
| 793 US Rte 20 West, PO Box 390 Elizabeth, IL 61028 Phone: 800-858-5522 ext. 1339 Fax: 815-858-2080 Coop/Municipal Utility - Lg | Website: http://www.jocarroll.com/ |
|
| KCH Mechanical, Inc | ||
| 15500 E State Hwy 33 Teutopolis, IL 62467 Phone: 217-347-5755 Fax: 217-347-5715 Installing Contractor | |
|
| Keeven Heating And Cooling/Geothermal Experts | ||
| 555 Keeven Lane New Haven, MO 63068 Phone: 573-459-2135 Drilling Contractor/Loop Installer, Mechanical Contractor | ||
| L & H Services Inc | ||
| 1140 Dixie Hwy, Ste 4 Beecher, IL 60401 Phone: 708-946-2526 Phone (alternate): 888-946-2526 Fax: 708-946-9632 Installing Contractor | Website: http://www.lhserviceshvac.com |
|
| Lemanski Heating & A/C | ||
| 1398 S Armstrong Ave Freeport, IL 61032 Phone: 815-232-4519 Fax: 815-235-1444 Installing Contractor | Website: http://www.lemanskihvac.com |
|
| McDonald Renewable Energy | ||
| 413 N Walnut St Itasca, IL 60143 Phone: 630-780-6928 Installing Contractor | Website: http://www.mcdonaldrenewableenergy.com |
|
| McDonough Power Cooperative | ||
| 1210 W Jackson St, Box 352 Macomb, IL 61455 Phone: 309-833-2101 Coop/Municipal Utility - Lg | Website: http://www.mcdonoughpower.com |
|
| Mechanical Incorporated | ||
| 2279 East Yellow Creek Road Freeport, IL 61032 Phone: 815-297-6025 Fax: 815-297-9075 Mechanical Contractor | Website: http://http:www.mechinc.com |
|
| MEP Associates LLC | ||
| 2720 Arbor Ct. Eau Claire, WI 54701 Phone: 715-832-5680 Designer/Engineer/Architect | Website: http://www.mepassociates.com |
|
| Midwest Geothermal | ||
| 4546 Roger B. Chaffee Mem Dr. Grand Rapids, MI 0 Phone: 616-514-1101 Drilling Contractor/Loop Installer | Website: http://www.mwgeothermal.com |
|
| Monroe County Electric Cooperative | ||
| PO Box 128 Waterloo, IL 62298 Phone: 618-939-7171 Coop/Municipal Utility - Sm (< 5000 meters) | Website: http://www.mcec.org |
|
| Neuhaus Heating & A/C, Inc | ||
| 10235 S Old Rte 66 Litchfield, IL 62056 Phone: 217-324-2818 Fax: 217-324-2881 Installing Contractor | Website: http://www.neuhaushvac.com |
|
| Plumbers And Pipefitters Local 23 | ||
| 4525 Boeing Drive Rockford, IL 61109 Phone: (815) 397-0350 Fax: (815) 397-0466 Educational (non-voting) | Website: http://www.ualocal23.org |
|
| Plumbers And Pipefitters Local 501 | ||
| 1295 Butterfield Rd Aurora, IL 60502 Phone: 630-692-7316 Phone (alternate): 630-692-7326 Fax: 630-978-9240 Educational (non-voting) | Website: http://www.ualocal501.org/ |
|
| Plumbers And Pipefitters, Local 23 | ||
| 4525 Boeing Dr. Rockford, IL 61109 Phone: 8153970350 Educational (non-voting) | ||
| Popejoy Inc. | ||
| 203 S. 10th St. Fairbury, IL 61739 Phone: 815-692-4471 Fax: 815-692-4553 Installing Contractor | Website: http://www.popejoyinc.com |
|
| Pro Air Heating, Cooling, Electrical & Geothermal | ||
| 106 Oak Creek Plaza Bloomington, IL 61704 Phone: 309-452-3415 Fax: 309-829-0600 Installing Contractor | Website: http://www.proairhvac.com |
|
| Rural Electric Convenience Cooperative | ||
| 3793 W State Rt 104, PO Box 19 Auburn, IL 62615 Phone: 217-438-6197 Coop/Municipal Utility - Sm (< 5000 meters) | Website: http://www.recc.coop |
|
| Schuster Heating & Pump Co., Inc. | ||
| 15674 Key City Lane Peosta, IA 52068 Phone: (563) 582-2148 Fax: (563) 557-5188 Installing Contractor | Website: http://www.schusterpump.com |
|
| Scranton Heating & Cooling | ||
| 868 975N Ave Mt Sterling, IL 62353 Phone: 217-773-2626 Phone (alternate): 217-773-2751 Installing Contractor | Website: http://www.comfortman.com |
|
| Sheet Metal Workers' Local 265 | ||
| 205 Alexandra Way Carol Stream, IL 60188 Phone: 630-668-0110 Fax: 630-668-2876 Educational (non-voting) | Website: http://www.smart265.org |
|
| Shelby Electric Cooperative | ||
| 1355 Hwy 128, PO Box 560 Shelbyville, IL 62565 Phone: 217-774-3986 Phone (alternate): 217-774-3986 Coop/Municipal Utility - Lg | Website: http://www.shelbyelectric.coop |
|
| Sierra Club | ||
| RR 2, Box 3A Harrisburg, IL 62045 Phone: 618-477-7882 Friend of the Industry (non-voting) | ||
| Sierra Club, Illinois Chapter | ||
| 70 E Lake St, Ste 1500 Chicago, IL 60601 Phone: 312-251-1680 Fax: 312-251-1780 Friend of the Industry (non-voting) | Website: http://illinois.sierraclub.org |
|
| Snell Plumbing And Heating | ||
| 617 S Springfield Virden, IL 62690 Phone: 217-965-3911 Installing Contractor | Website: http://www.snellonline.com |
|
| Southwestern Electric Cooperative | ||
| 525 US Rt 40 Greenville, IL 62246 Phone: 800-637-8667 Coop/Municipal Utility - Lg | Website: http://www.sweci.com |
|
| Southwestern Illinois College | ||
| 4950 Maryville Rd Granite City, IL 62040 Phone: 618-797-7448 Fax: 618-797-1584 Educational (non-voting) | Website: http://www.swic.edu/hvacr/ |
|
| Spoon River Mechanical Services | ||
| 405 1/2 E Linn St Canton, IL 61520 Phone: 309-647-2700 Fax: 309-647-7354 Installing Contractor | ||
| Steidinger Brothers, Inc. | ||
| 124 E. Locust Street Fairbury, IL 61739 Phone: 815-692-2042 Fax: 815-692-4262 Installing Contractor | Website: http://www.steidingerbrothers.com |
|
| Sub-Surface Geothermal, Inc. | ||
| 1201 Carey Dr McHenry, IL 60050 Phone: 847-815-1958 Phone (alternate): 815-363-0549 Drilling Contractor/Loop Installer | Website: http://www.subsurfacegeothermal.com |
|
| TCI Companies Inc. | ||
| 405 State Route 117 Goodfield, IL 61742 Phone: 309-965-2057 Fax: 309-965-2376 Drilling Contractor/Loop Installer | Website: http://www.tcicompaniesinc.com |
|
| The Habegger Corporation | ||
| 2220 W Altorfer Dr Peoria, IL 61615 Phone: 309-691-4328 Fax: 309-693-2665 Supplier/Distributor | Website: http://www.habeggercorp.com |
|
| The Hole Deal, Inc | ||
| PO Box 127 Goodfield, IL 61742 Phone: 309-222-5265 Drilling Contractor/Loop Installer | Website: http://www.theholedealinc.com |
|
| Toennies Service Co | ||
| 219 E Main St Damiansville, IL 62215 Phone: 618-248-5130 Fax: 618-248-5812 Installing Contractor | Website: http://www.toenniesservice.com |
|
| Top Tec Heating, Cooling, Plumbing And Electrical, Inc. | ||
| 345 E. Park Ave. Libertyville, IL 60048 Phone: 847-362-0262 Fax: 847-362-0264 Installing Contractor | Website: http://toptectoday.com |
|
| Town & Country Services | ||
| 220 La Salle St Tonica, IL 61370 Phone: 815-442-3415 Phone (alternate): 815-481-1783 Installing Contractor | Website: http://http:/www.towncountryservices.com |
|
| Wabash Valley Power | ||
| 722 N High School Rd PO Box 24700 Indianapolis, IN 46224 Phone: 317-481-2800 Coop/Municipal Utility - Lg | Website: http://www.wvpa.com |
|
| WaterFurnace | ||
| 927 Comstock Station Saint Peters, MO 63376 Phone: 877-304-7255 Phone (alternate): 260-442-7246 Fax: 877-799-3965 Manufacturer | Website: http://www.waterfurnace.com |
|
| Wayne-White Counties Electric Cooperative | ||
| 1501 W Main Fairfield, IL 62837 Phone: 618-842-2196 Coop/Municipal Utility - Lg | Website: http://www.waynewhitecoop.com |
|
| Weidner Refrigeration, Inc | ||
| 14450 Frazee Rd Divernon, IL 62530 Phone: 217-628-3400 Installing Contractor | |
|
| Wirth, Inc. | ||
| 133 E Exchange St Geneseo, IL 61254 Phone: 3099444612 Phone (alternate): 3099444612 Fax: 3099443507 Installing Contractor | Website: http://www.wirthinc.com |
|
| Yard Heating And Cooling | ||
| 100 S Spressor St Taylorville, IL 62568 Phone: 217-824-4737 Installing Contractor | Website: http://www.yardheatingandcooling.com |
|