Pennsylvania

Average Groundwater Temperatures for the Cities in Pennsylvania

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.

 

Pennsylvania Groundwater Temperature Yearly Average

 

City Groundwater Temperatures

Philadelphia

19120 | 19124 | 19111 | 19143 | 19134 | 19149 | 19104 | 19148 | 19140 | 19145 | 19131 | 19139 | 19144 | 19147 | 19146 | 19128 | 19152 | 19135 | 19116 | 19141 | 19115 | 19136 | 19154 | 19151 | 19138 | 19132 | 19114 | 19121 | 19119 | 19142 | 19133 | 19130 | 19125 | 19103 | 19150 | 19122 | 19126 | 19123 | 19107 | 19153 | 19106 | 19118 | 19129 | 19137 | 19127 | 19102 | 19113 | 19109 | 19112

50°F

Pittsburgh

15237 | 15235 | 15221 | 15206 | 15236 | 15227 | 15213 | 15217 | 15212 | 15210 | 15216 | 15205 | 15241 | 15239 | 15202 | 15220 | 15228 | 15219 | 15226 | 15229 | 15234 | 15218 | 15214 | 15243 | 15238 | 15215 | 15201 | 15209 | 15207 | 15232 | 15224 | 15211 | 15208 | 15203 | 15204 | 15223 | 15222 | 15233 | 15225 | 15260 | 15290

49°F

Allentown

18102 | 18103 | 18104 | 18109 | 18106 | 18101 | 18105 | 18195

46°F

Scranton

18505 | 18504 | 18509 | 18510 | 18508 | 18512 | 18519 | 18503

46°F

Erie

16509 | 16510 | 16506 | 16503 | 16505 | 16508 | 16504 | 16502 | 16511 | 16507 | 16501 | 16563 | 16546

47°F

Reading

19606 | 19601 | 19604 | 19607 | 19608 | 19605 | 19602 | 19610 | 19611 | 19609

48°F

Harrisburg

17112 | 17111 | 17110 | 17109 | 17104 | 17103 | 17113 | 17102 | 17101 | 17120

49°F

State College

16801 | 16803

45°F

Chambersburg

17202 | 17201

45°F

East Stroudsburg

18301 | 18302

45°F

Lebanon

17042 | 17046

48°F

Johnstown

15905 | 15904 | 15902 | 15906 | 15909 | 15901

47°F

Altoona

16601 | 16602

46°F

Williamsport

17701 | 17702

48°F

Gettysburg

17325

47°F

Warren

16365

47°F

Hazleton

18201 | 18202

44°F

Lancaster

17603 | 17601 | 17602 | 17606

44°F

York-Hanover

17403 | 17402 | 17404 | 17406 | 17408 | 17401 | 17407

48°F

Hershey

17033

48°F

Punxsutawney

15767

46°F

 

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

Since Pennsylvania's average temperature range is between 44°F and 50°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 groundwater 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