EEMAX SPEX4277
0.96 UEF DOE CCD · 2026-09-19Grade E: where this UEF sits among the 271 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tankless unit, very small draw pattern (small units - a single bathroom, or a point-of-use heater under a sink).
Checking EEMAX SPEX4277? This electric tankless unit uses 615 kWh of electricity a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That equals its class median of 615 kWh, a difference of 0 kWh. It ranks 77th lowest of 271.
Energy use per year
615 kWh a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the electricity rate where you live.
That is equal to the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 77 of 271, lowest energy first.
Solid line: this model (615 kWh). Dashed line: the class median.
Min 562 kWh Median 615 kWh Max 649 kWh
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 0.96 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tankless unit at the very small draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Very small DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 0.4 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,306–$1,838 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
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Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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How to size a tankless water heater by GPM
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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All electric tankless water heaters
Electric instantaneous units, sized by flow rate rather than tank gallons.
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Every EEMAX model on file
What this brand files, by heater type.
UEF 0.96 · Grade E Price it on your ZIP
The figure of 615 kWh is computed by this site, not by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.96 with the daily hot-water draw the DOE test assigns to the very small draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw, so a household that uses more or less hot water will use a different amount. The comparison covers the 271 models registered as an electric tankless unit at this draw pattern. Their median is 615 kWh, so this model sits 0 kWh from the median. The calculation is explained in how the annual cost is calculated.
This model has a maximum flow rate in gallons per minute of 0.4. Its draw pattern is meant for small units, such as a single bathroom or a point-of-use heater under a sink, and the 615 kWh figure applies to that use. Within its class it ranks 77th lowest of 271 for energy use, in the second-lowest quarter. That rank compares only models at the same draw pattern; it says nothing about units tested at larger patterns. A household with higher hot-water demand should not read 615 kWh as its own usage. It can compare other sizes with the selector by fuel, space and size. This page does not show measured household use, so actual energy may differ.
Running cost is not stated here because it depends on your own utility electricity tariff. Multiplying 615 kWh by the rate on your bill gives the yearly electricity cost at the very small draw pattern. The cost calculator on your own ZIP does this with the tariff for your location. Because this model's energy use equals the class median of 615 kWh, a difference of 0 kWh, its running cost matches that of a model using exactly the median energy at the same rate. The modeled installed-cost range appears in its own block on this page, with its source and date. If you need a same-class alternative to compare, find a same-class replacement by model number. Your actual bill also depends on how much hot water your household draws, which is not available in this data.
DOE CCD · 2026-09-19