Illinois
Average Groundwater Temperatures for the Cities in Illinois
Average groundwater temperatures play an important role in determining which tankless water heater to purchase. The reason for this is because in colder climates the groundwaters starting temperature is colder than in warmer climates. This causes the tankless water heater to work harder to increase the water temperature in colder climates, which in turn causes the flow rate to decrease in parallel. For example, if the starting water temperature is 52°F and you need to raise the water temperature to 110°F. Then your tankless water heater needs to be capable of raising the water temperature by 58°F and still have enough flow to support the fixtures you want to simultaneously run.
How Flow Rates are Affected by Temperature
In the example below, you can see the impact that temperature has on flow rates. This example is based on a tankless water heater that has a flow rate rated for 8 GPM.
| Temperature Zone | Efficiency |
|---|---|
| +71 °F | 100% (8 GPM) |
| 61 – 70 °F | 73% (5.8 GPM) |
| 51 – 60 °F | 58% (4.6 GPM) |
| 41 – 50 °F | 48% (3.8 GPM) |
| < 40 °F | 41% (3.2 GPM) |
Based on the corresponding flow rates for each appliance that are listed. A tankless water heater that is rated with a flow rate of 8 GPM (gallons per minute) is capable of running these items at the same time in regions with an average groundwater
temperature of 72°F.
Shower = 3 GPM
Kitchen Sink = 1.5 GPM
Washing Machine = 2.5 GPM
Total = 7 GPM
If you take this same exact tankless water heater and install it in a region that has an average groundwater temperature of 52°F (green zone). This will lower that tankless water heater's max GPM output to 4.64 GPM.
Shower = 3 GPM
Kitchen Sink = 1.5 GPM
Total = 4.5 GPM
As you can see before purchasing a tankless water heater it's important to know the impact temperature has on its ability to heat water and its effect on the total GPM needs of your household.
Illinois Groundwater Temperature Yearly Average
| City and Zip Codes | Groundwater Temperatures |
|---|---|
|
Aurora 60502 |60503 | 60504 | 60505 | 60506 |
|
|
Carol Stream 60188 |
|
|
Champaign 61820 | 61821 | 61822 |
|
|
Chicago 60601 |60602 | 60603 | 60604 | 60605 | 60606 | 60607 | 60608 | 60609 | 60610 | 60611 | 60612 | 60613 | 60614 | 60615 | 60616 | 60617 | 60618 | 60619 | 60620 | 60621 | 60622 | 60623 | 60624 | 60625 |60626 | 60628 | 60629 | 60630 | 60631 | 60632 | 60633 | 60634 | 60636 | 60637 | 60638 | 60639 | 60640 | 60641 | 60642 | 60643 | 60644 | 60645 | 60646 | 60647 | 60649 | 60651 | 60652 | 60653 |60654 | 60655 | 60656 | 60657 | 60659 | 60660 | 60661 |
|
|
Cicero 60804 |
|
|
Columbus 62236 |
|
|
Crystal Lake 60012 | 60014 |
|
|
Danville 61832 | 61834 |
|
|
Decatur 62521 |62522 | 62523 | 62526 |
|
|
Dekalb 60115 |
|
|
Des Plaines 60016 | 60018 |
|
|
Downers Grove 60515 | 60516 |
|
|
East Peoria 61611 |
|
|
East Saint Louis 62201 | 62203 | 62204 | 62205 | 62206 | 62207 |
|
|
Elgin 60120 | 60123 | 60124 |
|
|
Elmhurst 60126 |
|
|
Elmwood Park 61529 | 60707 |
|
|
Evanston 60201 | 60202 | 60203 |
|
|
Glenview 60025 | 60026 |
|
|
Granite City 62040 |
|
|
Joilet 60431 | 60432 | 60433 | 60435 | 60436 |
|
|
Kankakee 60901 |
|
|
Lombard 60148 |
|
|
Melrose Park 60160 | 60164 |
|
|
Moline 61265 |
|
|
Mount Prospect 60056 |
|
|
Naperville 60540 | 60563 | 60564 | 60565 |
|
|
Oak Lawn 60453 |
|
|
Oak Park 60301 | 60302 | 60304 |
|
|
Orland Park 60462 | 60467 |
|
|
Palatine 60067 | 60074 |
|
|
Peoria 61602 |61603 | 61604 | 61605 | 61606 | 61607 | 61614 | 61615 | 61625 |
|
|
Plainfield 60544 | 60585 | 60586 |
|
|
Rockford 61101 |61102 | 61103 | 61104 | 61107 | 61108 | 61109 | 61112 | 61114 |
|
|
Romeoville 60446 |
|
|
Springfield 62701 |62702 | 62703 | 62704 | 62707 | 62711 | 62712 |
What Tankless Water Heater Should you Buy if you Live in Illinois?
Since Illinois' average temperature range is between 46°F and 54°F. It is recommended that you select a green zone or light blue zone Tankless Water Heater. To see the recommended Tankless Water Heaters that apply to the light blue and green zone temperatures please follow the link that corresponds to the region of your average city temperature.
| Temperature zone | Recommended Tankless Water Heater |
|---|---|
| < 40 °F | Tankless Water Heater Recommendations |
| 41 – 50 °F | Tankless Water Heater Recommendations |
| 51 – 60 °F | Tankless Water Heater Recommendations |
| 61 – 70 °F | Tankless Water Heater Recommendations |
| +71 °F | Tankless Water Heater Recommendations |
For more information, please contact HydroFLOW Midwest
