Mini-tank heater · EcoSmart

EcoSmart ECO MINI 4 Mini-Tank Water Heater

4-gallon mini-tank heater

4 gal tank1.44 kW120 V

Updated October 2026

The short answer

A solid mini-tank heater for one sink far from the main heater.

Delivers
4-gallon tank.
Watch for
Runs out after its stored gallons.
Suits
One sink far from the main heater.
Max flow (maker)
1.75 GPM
Power
1.44 kW
Voltage
120 V
Tank
4 gal
Material
Plastic
Dimensions (seller)
16.2"W x 17.5"H
Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

What it delivers

The EcoSmart ECO MINI 4 Mini-Tank Water Heater is a mini-tank heater holding 4 gallons, rated at 1.44 kW on 120 volts.

Small tanks like this serve one sink or a wet bar: hot water on demand from storage, reheated between uses.

At 120 volts it plugs into or wires to an ordinary household circuit, which is why mini tanks are a common retrofit.

From the listing: features: Lightweight; material: Plastic; model: ECO MINI 4; warranty: 6 years limited leaks/2 year parts.

The listing gives dimensions of 16.2 in (W) x 17.5 in (H) and a weight of 19.3 lb.

Warranty, per the listing: 6 years limited leaks/2 year parts.

Right unit for this house?

Install it when

  • One sink far from the main heater
  • Wet bars, garages and offices

Look at another unit when

  • Showers or whole-house use
  • Long continuous draws

Strengths and trade-offs

Strengths

  • 4-gallon tank
  • 120 V
  • Hot water at the tap in seconds

Trade-offs

  • Runs out after its stored gallons
  • Occupies cabinet space

Install limits

  • Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberECO MINI 4Retailer
Tank4 galRetailer
Dimensions (seller)16.2"W x 17.5"HRetailer
Features (seller)LightweightRetailer
Power1.44 kWRetailer
Voltage120 VRetailer
Max flow (maker)1.75 GPMRetailer
Product weight19.3 lbRetailer
MaterialPlasticRetailer
Warranty6 years limited leaks/2 year partsRetailer

Rival units at this flow

More point-of-use water heaters rated for similar demand

Full point-of-use water heaters spec grid · Every EcoSmart unit in the catalog

Final verdict

A solid mini-tank heater for one sink far from the main heater.

Buy this unit

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What is the EcoSmart ECO MINI 4 Mini-Tank Water Heater for?
The EcoSmart ECO MINI 4 Mini-Tank Water Heater is a mini-tank heater holding 4 gallons, rated at 1.44 kW on 120 volts.