NAVIEN NHW700-160AE-NG
0.81 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 397 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tankless unit, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking a registry record, the NAVIEN NHW700-160AE-NG uses 209 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 27 therms above the class median of 182 therms among 397 models.
Energy use per year
209 therms 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 natural gas rate where you live.
That is above the median of 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 323 of 397, lowest energy first.
Solid line: this model (209 therms). Dashed line: the class median.
Min 173 therms Median 182 therms Max 209 therms
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
- 0.81 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tankless unit at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 4 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,698–$2,632 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 gas tankless water heaters
Gas-fired instantaneous units, sized by flow rate rather than tank gallons.
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Every NAVIEN model on file
What this brand files, by heater type.
UEF 0.81 · Grade G Price it on your ZIP
The annual figure 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 0.81 for this model, and from the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. The steps are set out in how the annual cost is calculated. Among the 397 models registered as a gas tankless unit at the high draw pattern, this one ranks 323rd lowest in energy use. Its 209 therms sits 27 therms above the class median of 182 therms, which places it in the highest quarter of its class for energy use.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The figure of 209 therms applies to that pattern only. A value for any other draw pattern is not available on this page. The maximum flow rate in gallons per minute is 4. The energy figure was computed from UEF and the daily draw, not from flow rate. A reader whose household matches the high draw pattern can compare this unit with the class median of 182 therms. A reader with a different pattern should not use this number. To narrow candidates by fuel, space and size, use the water heater selector. To compare units tested at the same pattern, find a same-class replacement by model number.
Running cost is not stated in the text because it depends on your state's average residential gas price, and no single price applies to every reader. The page computes it from your ZIP, applying that price to 209 therms of natural gas at the high draw pattern. Because this model uses 27 therms more than the class median of 182 therms, it draws more gas per year than the median unit at the same pattern. The cost of that difference depends on the same price. For your own figure, use the cost calculator on your ZIP. The modeled installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote, and it is not repeated here. Actual household use may differ from the federal test's daily draw, and the registry gives no measure of that difference.
DOE CCD · 2026-09-19