Chronomite M
0.94 UEF DOE CCD · 2026-09-19Grade F: 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 this unit's energy figure: the Chronomite M, an electric tankless unit, uses 628 kWh a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That is 13 kWh above the class median of 615 kWh; it ranks 188th lowest in energy use of 271 models.
Energy use per year
628 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 above the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 188 of 271, lowest energy first.
Solid line: this model (628 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
- 0.94 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
- 1.1 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,300–$1,790 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 0.94 · Grade F Price it on your ZIP
The figure of 628 kWh 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 0.94 with the federal test's daily hot-water draw for the very small draw pattern. The fuel is electricity, and the registry data come from the DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw; a household that draws more or less hot water will use a different amount. The steps behind the calculation are described in how the annual cost is calculated.
The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. Among the 271 electric tankless models in that class, this one uses 13 kWh more than the class median of 615 kWh. Its rank of 188th lowest energy use places it in the second-highest quarter of its class for energy use. The registry lists a maximum flow rate in gallons per minute of 1.1. The data here do not state the temperature rise at which that flow is reached. To compare against other models of the same class, you can find a same-class replacement by model number.
The running cost is not stated in the text because it depends on your own utility electricity tariff. Multiply 628 kWh by the rate on your bill, or use the cost calculator on your own ZIP to see the result. The 13 kWh gap above the class median is priced the same way, at your rate. The energy figure applies to the very small draw pattern only. A unit serving more than a single bathroom or a sink falls outside that pattern, and this page has no figure for it. If you are unsure which class fits your space, the selector by fuel, space and size covers that. The installed price appears in its own block with its source and date, as a modeled range and not a quote.
DOE CCD · 2026-09-19