Eemax SP3512 Electric Tankless Water Heater Review

Eemax SP3512 Electric Tankless Water Heater

If you are after a tankless water heater for occasional handwashing at a single sink, then the Eemax SP3512 is the one for you. Established in 1988, Eemax is a well known supplier of tankless water heater solutions. Their tankless products are made in the USA and have been used in industrial, residential and commercial applications. Let’s see what makes this hand wash heater one to consider.

The Eemax SP3512 is a single point hand washing heater that offers easy of installation. It works with hands-free, sensor, and metering faucets. Weighing 3 lbs, the unit measures 10.75” x 5.25” x 2.875”. The space-saving design allows installation almost anywhere. You can install it directly underneath the sink. The unit is supplied with 3/8-Inch compression fittings. No T and P relief valve needed. This reduces installation cost. Just keep in mind that it calls for 10-2W/G on a 30 amp circuit breaker to operate. It draws 29 amps of current.

This unit is designed to be installed close to the point of use. This helps obtain optimum performance. The tankless design translates to energy saving. There is no stand-by heat loss. Unlike traditional hot water heaters, the 3.5 Kilowatts electric heater is manufactured with an enclosed flow switch that activates heater only on demand. No water storage also means it reduces the risk of legionnaires disease, a potentially deadly bacterial infection.

The 120 Volts tankless water heater has a Temperature range of 105°-110°F max. This reduces the risk of scalds. Water temperatures above 120°F are scalding. A lower hot water heater temperature also slows mineral buildup and corrosion. As you know, higher water temperatures cause minerals to be deposited faster.

A flow of 0.5 gallon per minute is required to turn on the heater. Be sure that the minimum activation rate to switch on your unit is met. It will deliver 0.5 gallon per minute at 48 degrees F temperature rise. The unit will produce 0.5 gallon per minute at 105°F with incoming water temperature at 57°F. It provides a 35°F temperature rise at 0.7 GPM. With this single point of use water heater, the water temperature is proportional to the flow through the heater. The lower the flow the higher the temperature.

This unit is designed for cold water inlet only. It also requires a minimum 30 amp service and 10 WGA wires to operate. If you want a high-capacity heater, this is not it. It is a low flow heater which is not meant for more than a single sink. However, it seems to live up to its claims. The Eemax SP3512 Tankless Water Heater has received some very positive feedback from its customers at The customers who bought it seem satisfied with its performance. As long as you know its limitations, this single point hand washing unit can be a great investment.

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