EcoSmart's POU (point-of-use) line includes smaller electric tankless heaters intended for single-fixture or small-zone applications rather than whole-house service. These compete in the same market segment as Bosch mini-tank electric, Stiebel Eltron mini, and Eemax SP series.
POU lineup
EcoSmart's point-of-use offerings include the ECO MINI mini-tanks (4-gallon and 7-gallon stored capacity) and small flow-through electric tankless variants. The mini-tank approach buffers a small reserve of hot water at the fixture; the flow-through approach heats on demand with no storage.
Mini-tank vs flow-through POU
| Aspect | Mini-tank | Flow-through |
|---|---|---|
| Initial flow at fixture | Instant (tank pre-heated) | Brief delay during heating |
| Standby loss | Small (insulated tank) | None |
| Electrical demand | 1500W typical | 3500W+ at flow |
| Sustained hot water | Limited to tank size | Endless |
| Install complexity | Plug-in often sufficient | Hardwired typical |
Sizing decision
For a single faucet handwash (kitchen prep sink, bathroom vanity), the mini-tank 4-gallon often suffices. For a low-flow shower (1.5 GPM), the 7-gallon mini-tank provides 4–5 minutes of pre-heated water before running out. For continuous-flow applications (single-fixture shower with longer use, dish sink with sustained washing), flow-through is the right choice.
Installation under sink
Mini-tank install requires: cold water inlet connection (compression typically), hot outlet to fixture, T&P or pressure-relief, mounting on wall or counter shelf. Most plug into standard 120V outlets. Verify the mounting can support the tank's full weight (~25 lbs for 4-gallon, ~40 lbs for 7-gallon).
EcoSmart POU vs competitors
- vs Bosch Tronic mini-tank: Bosch is the engineering benchmark; EcoSmart is value-priced at similar capacity. For long-tenure under-sink installation, Bosch's German build pays back.
- vs Stiebel Eltron SHC mini-tank: Stiebel is the premium pick for visible installs (better aesthetics). EcoSmart wins on price for hidden under-sink work.
- vs Eemax SP single-point: Eemax is hardwired flow-through, EcoSmart POU offers both mini-tank and flow-through. Pick by use case.
Use cases that justify POU
- Bathroom or kitchen sink 30+ feet from the main water heater
- Garage, workshop, or outbuilding lavatory
- Office breakroom sink during commercial fit-out
- Boat or RV galley sink retrofit
- Basement bar sink or detached prep sink
Maintenance
Mini-tank: anode rod inspection at year 3, T&P testing annually, flush sediment quarterly in hard-water areas. Flow-through POU: inlet screen cleaning monthly, descaling annually in hard-water areas, no anode rod present.