High-performance, small-package features
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The iHeat HS-4 is a feature-rich tankless water heater intended for point-of-use applications such as under-sink, booster, or very low-flow rate showers in warm climates. Use in boats, apartments, hospitals, condos, cabins, studios, clinics, schools and pool houses.
Warranty| Descriptions | 40 Gallon Tank | Tankless Heater |
| Estimated Lifespan | 10 Years | 20 Years |
| Energy Efficiency | 0.85 EF | 0.99 EF |
| Hot Water Supply | 70% of Capacity | Endless Supply |
| Kilowatt Usage / Yr. | 4857 Kw/Hrs. | 2618 Kw/Hrs. |
| Heat recovery | Yes | No |
| Standby Loss | 20% | No Loss |
| 12 Month Operation Cost | $556.00 | $309.00 |
Specifications
| Dimensions | 11" x 6.5" x 3" | |
| Weight | 5.2 lbs. | |
| Cover | Brushed 304 Stainless Steel, IXP4 water proof | |
| Body/Heat Exchanger | ASTM 304 Stainless Steel | |
| Element | One 1.5" Brass Plug / Incoloy | |
| Pipe fittings | 1/2" NPT | |
| Activation flow rate | 0.33 gallons per minute | |
| Operation Pressure | 25 to 150 PSI | |
| Certifications | UL-499, CSA, NSF.372 Lead Free | |
| Temperature in °F at given flow rates | |||||||||||
| Model | KW | Volts | Amps | Breaker size |
HZ | AWG# | Current Phase |
0.5 GPM |
0.75 GPM |
1.0 GPM |
1.5 GPM |
| HS-4 (this page) | 3.5 | 120V | 28 | 30 | 50/60 | 10-2 | Single | 44 | 33 | 23 | - |
| HS-7 | 7 | 240V | 29 | 30 | 50/60 | 10-2 | Single | 95 | 71 | 48 | 31 |
Documentation
User and Installation Manual
Product Specifications
Product Warranty
Frequently Asked Question ("FAQ")
Q: If the power goes out, will I need to reset my output temperature setting?
A: Yes.
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