Eemax EX90 "Flow Controlled" Electric Tankless Water Heater Review

Eemax EX90 Flow Controlled Electric Tankless Water Heater
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I'm glad to see nobody else has bought one of these for their kitchen. I found lots of problems with mine:
1. There's a 3 second delay, causing a huge cold water sandwich, i.e., if you shut it off, or adjust it and it drops below the minimum flow, you'll get a huge wave of cold water for about six seconds, 3 for the delay, 3 more to warm up.
2. No more warm water trickle. In order to get half warm, half cold, you need to adjust the flow to 1.4 gallons/minute, hardly a small flow. The heater will not turn on unless 0.7 gpm flows in the hot water side.
3. Adjustment of temperature is a major job -- you need to shut off the dedicated breaker, remove the plate, and guess at where you want the setting, put the cover back on, restore the breaker. Then repeat the process until the temperature is correct.
4. It requires a dedicated 220 V 40 amp (for my model) line, an expensive item to install. And flourescent lights will flicker just a bit when the heater is on.
We like to wash small cups, silver, or a single dish or two by turning on a small warm or hot flow and rinsing, soaping, and rinsing in one stage, using a small amount of water. Then if we find another dish, it's nice to find the water is still warm. We can turn off and not waste the water between small washings. We've developed this habit due to the occasional water rationing we get here in CA.
Not so with the Eemax... Once you shut it off, you won't see hot water again for about 6 seconds. That's a lot of water down the drain. In general, this system is a huge water waster.
We find ourselves either scalding our hands, or washing in cold water. We paid for a new dedicated 220v line and breaker, and installation, which took a couple of days and cost a couple of grand. It was a collosal waste to buy this for a kitchen. I wouldn't want it in my bathroom either, no more running trickles of water for shaving, and either scalded hands or cold water washes.
The only good thing it does is provide the dish washer with very hot water. It works fine there, and I suppose I'll leave it there. But I'll have to add a small tank now for the hot water tap.
I suppose if you like to fill a sink with hot water for the wash, and again for the rinse, it might work for you. If that's always the way you work.
Save your money. Use a small tank for kitchen or bathroom, use the 110 volt existing line, and forget Eemax and equivalents!

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The Eemax EX90 "Flow Controlled" Electric Tankless Water Heater.Recommended cold water feed. Turn on flow .7 GPM, max 2 GPM.Eemax EX90 "Flow Controlled" Electric Tankless Water Heater Applications:; Kitchen Sinks ; Bar Sinks ; Utility Sinks ; Manufacturing Facilities ; Modular Buildings and Tenant Spaces ; Dual Handwash Sinks (DL) ; Hand Set Shower (.7 - 2 GPM) Eemax EX90 "Flow Controlled" Electric Tankless Water Heater Features:; On Demand Hot Water - no delay. ; Cut Energy Waste -flow switch activates heater only on demand (no standby heat loss). ; Continuous Hot Water - no storage capacity to run out. ; Reduces Installation Cost - no T & P relief valve needed (check local codes). ; Easy Installation - only one cold water line need be brought to lavatory. ; Mounts on wall at point-of-use. ; Hands Free - sensor and metering faucet compatible. ; Prevents Legionella Bacteria Growth ; Designed for Durability - constructed of high strength reinforced "ENGINEERING PLASTIC" ; Ni Chrome Element - a unique, patented flow path ensures optimum heat transfer and extended element life. ; Compact Size - dimensions 10.75"x5.25"x2.125"; Reduces Calcification. ; Space Saving Installation - under sink, point-of-use. ; Field Serviceable Element - replaceable cartridge element.; Complies with handicap requirements. Eemax EX90 "Flow Controlled" Electric Tankless Water Heater Specifications:; EX = Bottom Water Connection, 1/2" compression fittings; Volts 277V; KW 9.0kW; Amps 33A; Rise at .75 GPM 82;F; Rise at 1.0 GPM - 61;F; Rise at 1.5 GPM - 41;F; Rise at 2.0 GPM 31;F; Wire Size AWG 10; Dimensions - 10.75" x 5.25" x 2.125" ; Weight 3 lbs ; Element - Replaceable cartridge insert * The voltage, amperage, and circuit breaker specifications must be met for this heater to function. Please make sure all requirements are met before purchasing this heater. Manufacturer's start up procedures must be observed.

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