Wisconsin

Average Groundwater Temperatures for the Cities in Wisconsin

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)

The efficiency percentage is an average based on Siebel TempraRinnai RU199, and ECO90 tankless water heater models.

 

Flow Rates of Appliances

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.

 

Wisconsin Groundwater Temperature Yearly Average

 

City Groundwater Temperatures

Milwaukee

53215 | 53209 | 53218 | 53221 | 53204 | 53207 | 53211 | 53214 | 53219 | 53216 | 53212 | 53208 | 53217 | 53223 | 53213 | 53210 | 53225 | 53222 | 53220 | 53202 | 53227 | 53206 | 53224 | 53226 | 53228 | 53233 | 53205 | 53203 | 53295

44°F

Madison

53711 | 53704 | 53703 | 53719 | 53705 | 53713 | 53716 | 53714 | 53715 | 53718 | 53717 | 53706 | 53726 | 53702 | 53792

46°F

Green Bay

54313 | 54311 | 54302 | 54303 | 54304 | 54301 | 54307

44°F

Racine

53402 | 53403 | 53406 | 53405 | 53404

47°F

Oshkosh

54901 | 54902 | 54904

47°F

Appleton

54915 | 54914 | 54911 | 54913

48°F

Eau Claire

54703 | 54701

49°F

Janesville

53546 | 53545 | 53548

45°F

Wausau

53546 | 53545 | 53548

44°F

Sheboygan

53081 | 53083

47°F

Fond Du Lac

54935 | 54937

47°F

Whitewater

53190

43°F

Elkhorn

53121

48°F

 

What Tankless Water Heater Should you buy if you Live in Wisconsin?

Since Wisconsin's average temperature range is between 44°F and 48°F. It is recommended that you select a light blue zone tankless water heater. To see the recommended tankless water heaters that apply to the light blue 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