Map Sizing Guide
Tankless Hot Water Tank
How to Size a Whole House Tankless Water Heater
Find the Best Tankless Hot Water Tank in Three Easy Steps It’s easier than ever to figure out which infrared tankless hot water tank system is best for your home or business. SuperGreen created this user-friendly three step process to help you quickly and easily determine which model is best for you. Just select the appropriate color from the map, add up your hot water requirements, and check the chart to see which infrared tankless water heating model is best suited to handle your needs.
1 Look at the color chart of North America to find the average incoming water temperature in your region.
2 Look at the chart to the right for the applications that call for hot water and much they use per minute or (GPM), base on the applications you plan or running at one time your water must heat that much water per minute
Represents a hand sink faucet opened full with a flow of 0.5 – 1.5 GPM- Represents a water-saver shower head opened full with a flow of 1.5 – 2.5 GPM
- Average Hot Water Temp is 105°F-115°F.
To get your temperature rise take your desired hot water temp minus the incoming water temp = temp rise
Example : 107°F desired hotwater – 57°F = 50°F temperature rise - Standard deviation:
Power: -1kW/ + 1kW
Tem Rise: -3°F/ +3°F
Water Flow: -0.1 gpm/ +0.1gpm
- Applications
- Standard Shower Head 2.0 GPM
- Water-Saver Shower Head 1.5 GPM
- Bathroom Vanity Sink Faucet 0.5 – 1.5 GPM
- Kitchen Sink 1-2 GPM
- Bath Tub 2.5 – 4 GPM
- Dishwasher 1-2 GPM
- Washing Machine 1-1.5 GPM
- Body Shower 1.6-2.0 GPM Each
- Jacuzzi or Roman Soaker Tub 4.0-5.0 GPM
Click here to display charts
Inlet Temp: 37°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-245 POU | 70˚/ 0.6 | |
| IR-260 POU | 70˚/ 0.7 | |
| IR-14k220 POU | 70˚/ 1.7 | |
| IR-3000 | 70˚/ 0.9 | |
| IR-4000 | 70˚/ 1.1 |  |
| IR-6000 | 70˚/ 1.7 | |
| IR-8000 | 70˚/ 2.2 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 42°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-245 POU | 65˚/ 0.6 | |
| IR-260 POU | 65˚/ 0.8 | |
| IR-14k220 POU | 65˚/ 1.8 | |
| IR-3000 | 65˚/ 0.9 | |
| IR-4000 | 65˚/ 1.2 | |
| IR-6000 | 65˚/ 1.8 | |
| IR-8000 | 65˚/ 2.4 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 47°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-30 POU | 60˚/ 0.5 | |
| IR-220 POU | 60˚/ 0.5 | |
| IR-245 POU | 60˚/ 0.6 | |
| IR-260 POU | 60˚/ 0.8 | |
| IR-14k220 POU | 60˚/ 2.0 | |
| IR-3000 | 60˚/ 1.0 | |
| IR-4000 | 60˚/ 1.3 | |
| IR-6000 | 60˚/ 2.0 | |
| IR-8000 | 60˚/ 2.5 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 52°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-30 POU | 55˚/ 0.5 | |
| IR-220 POU | 55˚/ 0.5 | |
| IR-245 POU | 55˚/ 0.7 | |
| IR-260 POU | 55˚/ 0.9 | |
| IR-14k220 POU | 55˚/ 1.73 | |
| IR-3000 | 55˚/ 1.1 | |
| IR-4000 | 55˚/ 1.4 | |
| IR-6000 | 55˚/ 2.1 | |
| IR-8000 | 55˚/ 2.7 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 57°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-30 POU | 50˚/ 0.6 | |
| IR-220 POU | 50˚/ 0.6 | |
| IR-245 POU | 50˚/ 0.7 | |
| IR-260 POU | 50˚/ 1.0 | |
| IR-14k220 POU | 50˚/ 2.3 | |
| IR-3000 | 50˚/ 1.2 | |
| IR-4000 | 50˚/ 1.5 | |
| IR-6000 | 50˚/ 2.3 | |
| IR-8000 | 50˚/ 3.0 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 62°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-30 POU | 45˚/ 0.6 | |
| IR-220 POU | 45˚/ 0.6 | |
| IR-245 POU | 45˚/ 0.8 | |
| IR-260 POU | 45˚/ 1.1 | |
| IR-14k220 POU | 45˚/ 2.5 | |
| IR-3000 | 45˚/ 1.3 | |
| IR-4000 | 45˚/ 1.6 | |
| IR-6000 | 45˚/ 2.5 | |
| IR-8000 | 45˚/ 3.3 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 67°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-20 POU | 40˚/ 0.5 | |
| IR-30 POU | 40˚/ 0.7 | |
| IR-220 POU | 40˚/ 0.7 | |
| IR-245 POU | 40˚/ 0.9 | |
| IR-260 POU | 40˚/ 1.2 | |
| IR-14k220 POU | 40˚/ 2.8 | |
| IR-3000 | 40˚/ 1.4 | |
| IR-4000 | 40˚/ 1.8 | |
| IR-6000 | 40˚/ 2.8 | |
| IR-8000 | 40˚/ 3.6 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 72°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-20 POU | 35˚/ 0.5 | |
| IR-30 POU | 35˚/ 0.8 | |
| IR-220 POU | 35˚/ 0.8 | |
| IR-245 POU | 35˚/ 1.0 | |
| IR-260 POU | 35˚/ 1.3 | |
| IR-14k220 POU | 35˚/ 3.1 | |
| IR-3000 | 35˚/ 1.6 | |
| IR-4000 | 35˚/ 2.0 | |
| IR-6000 | 35˚/ 3.1 | |
| IR-8000 | 35˚/ 4.0 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
Inlet Temp: 77°F
| Model | Temp Rise/GPM | Approx. Usage |
|---|---|---|
| IR-20 POU | 30˚/ 0.6 | |
| IR-30 POU | 30˚/ 0.9 | |
| IR-220 POU | 30˚/ 0.9 | |
| IR-245 POU | 30˚/ 1.2 | |
| IR-260 POU | 30˚/ 1.5 | |
| IR-14k220 | 30˚/ 3.6 | |
| IR-3000 | 30˚/ 1.6 | |
| IR-4000 | 30˚/ 2.3 | |
| IR-6000 | 30˚/ 3.6 | |
| IR-8000 | 30˚/ 4.6 | |
| IR+Hybird | 1.0 gpm – 7.0 gpm water flow | |
3 Match your location on the map, shown above, to the corresponding chart below to determine unit capacity.
| Model Number | kW | Volts | Minimun Breaker | Max Power (AMP) | Minimum Wire | Dimensions | Weight |
|---|---|---|---|---|---|---|---|
| IR-20 POU | 2.4 | 120 | 20 | 20 | 12 | 13.5″x 8.5″x 2.5″ | 5 lbs. |
| IR-30 POU | 3.4 | 120 | 30 | 28.3 | 10 | 13.5″x 8.5″x 2.5″ | 5 lbs. |
| IR-220 POU | 3.4 | 240 | 20 Double Pole | 14.17 | (2)12 | 13.5″x 8.5″x 2.5″ | 5 lbs. |
| IR-245 POU | 4.5 | 240 | 20 Double Pole | 18.75 | (2)12 | 13.5″x 8.5″x 2.5″ | 5 lbs. |
| IR-260 POU | 6.0 | 240 | 30 Double Pole | 25 | (2)10 | 13.5″x 8.5″x 2.5″ | 5 lbs. |
| IR-214 POU | 14 | 240 | 60 Double Pole | 58.4 | (2)6 | 18.5″x 12.5″x 3″ | 13 lbs. |
| IR-3000 | 7.0 | 240 | 30 Double Pole | 29.2 | (2)10 | 20″ x 14″ x 6″ | 25 lbs. |
| IR-4000 | 9.0 | 240 | 40 Double Pole | 37.5 | (2)8 | 20″ x 14″ x 6″ | 25 lbs. |
| IR-6000 | 14 | 240 | 60 Double Pole | 58.4 | (2)6 | 20″ x 14″ x 6″ | 27 lbs. |
| IR-8000 | 18 | 240 | 80 Double Pole | 75 | (2)4 | 20″ x 14″ x 6″ | 27 lbs. |