Hot Water List

EEMAX water heaters

56 basic models and 75 listed models.

Certified figures by basic model

EEMAX basic models and their certified figures
Basic modelTypeUEFFlow at a 67°F rise (gal/min)Recovery efficiencyModel numbers
AM004120T Electric tankless 0.930.393% AM004120T
AM004277T Electric tankless 0.940.492% AM004277T
AM005240T Electric tankless 0.960.596% AM005240T
AM007240T Electric tankless 0.950.694% AM007240T
AM008277T Electric tankless 0.960.895% AM008277T
AM010240T Electric tankless 0.960.994% AM010240T
AM010277T Electric tankless 0.961.095% AM010277T
AM012240T Electric tankless 0.951.193% AM012240T
ECO 11 Electric tankless 0.921.292% HA011240, PR011240
ECO 8 Electric tankless 0.960.793% ECOTB240, EEMTB240, HA008240, HATB007240, PR008240, RTHD-08, RTX3-08
ECO POU 3.5 Electric tankless 0.950.398% EEM12004, POU 4T, RTHD-04, RTX3-04
ECO POU 6 Electric tankless 0.940.598% EEM24006, POU 6T
ECO18 Electric tankless 0.941.798% EEM24018, HA018240, PR018240
ECO24 Electric tankless 0.932.498% EEM24024, HA024240, PR024240
ECO27 Electric tankless 0.932.598% EEM24027, HA027240, PR027240
ECO36 Electric tankless 0.943.598% EEM24036, HA036240, PR036240
RTEX-13 Electric tankless 0.881.398% PR013240
SPEX012240T Electric tankless 0.951.196% SPEX012240T
SPEX100 Electric tankless 0.961.094% SPEX100
SPEX100T Electric tankless 0.981.098% SPEX100T
SPEX1812 Electric tankless 0.950.294% SPEX1812
SPEX1812T Electric tankless 0.960.298% SPEX1812T
SPEX2412 Electric tankless 0.950.294% SPEX2412
SPEX2412T Electric tankless 0.960.298% SPEX2412T
SPEX3012 Electric tankless 0.960.395% SPEX3012
SPEX3012T Electric tankless 0.960.398% SPEX3012T
SPEX3208 Electric tankless 0.970.397% SPEX3208
SPEX3208T Electric tankless 0.970.398% SPEX3208T
SPEX3277 Electric tankless 0.950.395% SPEX3277
SPEX3277T Electric tankless 0.970.398% SPEX3277T
SPEX35 Electric tankless 0.950.494% SPEX35
SPEX3512 Electric tankless 0.940.394% SPEX3512
SPEX3512T Electric tankless 0.960.398% SPEX3512T
SPEX35T Electric tankless 0.970.398% SPEX35T
SPEX4208 Electric tankless 0.970.497% SPEX4208
SPEX4208T Electric tankless 0.980.496% SPEX4208T
SPEX4277 Electric tankless 0.960.496% SPEX4277
SPEX4277T Electric tankless 0.970.495% SPEX4277T
SPEX48 Electric tankless 0.960.593% SPEX48
SPEX48T Electric tankless 0.970.494% SPEX48T
SPEX55 Electric tankless 0.960.696% SPEX55
SPEX55T Electric tankless 0.970.598% SPEX55T
SPEX60 Electric tankless 0.960.696% SPEX60
SPEX60T Electric tankless 0.970.696% SPEX60T
SPEX65 Electric tankless 0.960.795% SPEX65
SPEX65T Electric tankless 0.970.698% SPEX65T
SPEX75 Electric tankless 0.960.895% SPEX75
SPEX75T Electric tankless 0.970.797% SPEX75T
SPEX80 Electric tankless 0.960.894% SPEX80
SPEX80T Electric tankless 0.980.898% SPEX80T
SPEX8208 Electric tankless 0.960.895% SPEX8208
SPEX8208T Electric tankless 0.980.797% SPEX8208T
SPEX90 Electric tankless 0.960.993% SPEX90
SPEX90T Electric tankless 0.980.998% SPEX90T
SPEX95 Electric tankless 0.960.995% SPEX95
SPEX95T Electric tankless 0.980.998% SPEX95T

A range means the models under one basic model differ. A dash means the model has no such figure.

This brand's highest UEF, the energy that reaches the water for each unit used, is 0.98. With 0.98, not all the energy used ended up in the water. The SPEX100T is one of 6 basic models with that UEF.

This brand's whole range is one type: electric tankless. Without a tank, the ECO36 gives this brand's highest flow. That flow is 3.5 gallons per minute for water warmed by 67°F.

This brand's 75 model numbers rank it below 13 of the 117 brands on this site. Of the other brands, 2 list at least one of this brand's basic model numbers. Of those, Rheem lists the most: 56 of this brand's 56.

Basic models shared with other brands

EEMAX basic models also listed under another brand
BrandShared basic models
Rheem56
ECOSMART8

Updated Oct 17, 2026 · Methodology