Chronomite SR
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).
If you are verifying the Chronomite SR: it uses 615 kWh of electricity a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That equals the class median of 615 kWh, a difference of 0 kWh, among 271 electric tankless models. 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
- 0.5 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.
UEF 0.96 · Grade E Price it on your ZIP
The 615 kWh figure is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.96 with the DOE test's daily hot-water draw for the very small pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure describes the test's draw only, so a household that draws more or less hot water will use a different amount. The registry lists a maximum flow rate in gallons per minute of 0.5 for this unit. No figure for any other draw pattern is shown on this page.
Among the 271 electric tankless models registered at the very small draw pattern, the Chronomite SR has the 77th lowest energy use, which falls in the second-lowest quarter of its class. Its 615 kWh equals the class median of 615 kWh, so the difference is 0 kWh. The very small pattern describes small units, such as a single bathroom or a point-of-use heater under a sink. It does not describe whole-house use. For a different fuel, space or size, the water heater selector filters by those inputs, and the same-class replacement lookup starts from a model number.
The running cost is not written in this text because it depends on your own utility electricity tariff. Multiplying 615 kWh by your rate per kilowatt-hour gives the annual cost at the very small draw pattern. The cost calculator for your ZIP does this for you, and the annual cost methodology explains each step. Your actual bill is unknown here, because the registry data does not include how much hot water your household draws. The modeled installed-cost range is a separate block on the page, with its own source and date, and it is not a quote.
DOE CCD · 2026-09-19