EEMAX SPEX4277T
0.97 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).
If you are checking the EEMAX SPEX4277T, this electric tankless unit uses 609 kWh of electricity a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That is 6 kWh below the class median of 615 kWh among 271 models, ranking 37th lowest.
Energy use per year
609 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 below the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 37 of 271, lowest energy first.
Solid line: this model (609 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
- 0.97 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
$1,309–$1,862 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
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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 0.97 · Grade E Price it on your ZIP
The figure of 609 kWh is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.97 for this model, and from the DOE test's daily hot-water draw for the very small draw pattern. The source is the DOE CCD, retrieved 2026-09-19. Against the class median of 615 kWh, the model sits 6 kWh lower, at 37th lowest energy use of 271. That places it in the lowest quarter of its class. The comparison holds only among models registered as an electric tankless unit at this draw pattern; it says nothing about other unit types or larger draws.
This draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The registered maximum flow rate in gallons per minute is 0.4, so 609 kWh describes light, low-flow use only. A household running several fixtures together, or a whole-home load, is outside what this figure represents, and no energy value for those conditions is available on this page. To compare units by fuel, space and size, use the water heater selector. To look for a same-class alternative to SPEX4277T, find a replacement by model number. The modeled installed-cost range appears in its own block on this page, with its source and date.
The running cost is not stated in the text because it depends on your own utility electricity tariff. Multiplying 609 kWh by your rate gives the yearly electricity cost at this draw pattern, and the cost calculator does that from your ZIP. The steps are described on the methodology page. At any tariff, the gap to a median model in this class is 6 kWh of energy per year, measured against 615 kWh. Real homes draw hot water differently from the federal test's daily draw, and this page holds no measured household data for SPEX4277T.
DOE CCD · 2026-09-19