stream33 S33-HPWH50
3.75 UEF DOE CCD · 2026-09-19Grade A: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the stream33 S33-HPWH50, this electric tank uses 866 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 2,665 kWh below its class median of 3,531 kWh. It ranks 21st lowest energy use of 426 comparable models.
Energy use per year
866 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 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 21 of 426, lowest energy first.
Solid line: this model (866 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 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
- 3.75 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 69 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 47 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2024-09-14 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- Yes (CTA-2045-B) ENERGY STAR · 2026-09-19
- Refrigerant and GWP (ENERGY STAR) the refrigerant a heat pump unit uses and its global warming potential, a leak's climate effect relative to carbon dioxide (CO2 = 1)
- R-134a, GWP 1430 ENERGY STAR · 2026-09-19
- Sound level (ENERGY STAR) how loud the unit is while it runs, in decibels as filed
- 49 dB ENERGY STAR · 2026-09-19
What it costs to install
$3,089–$4,419 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 · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Compressor operating range (ENERGY STAR)
- the air temperatures around the unit in which its heat pump runs; outside this range the heat pump stops
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
What 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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What size heat pump water heater do I need?
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 heat pump water heaters
Electric tanks that file a UEF of 2.0 or more — the registry has no separate heat pump type, so this site draws the line there.
UEF 3.75 · Grade A Price it on your ZIP
The 866 kWh figure is computed by this site, not by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium pattern. For the S33-HPWH50, the registry lists a UEF of 3.75. The medium pattern stands for a typical household on a busy morning. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at the test's daily draw. A household that uses more or less hot water than the test will see a different total. This page has no data on how large that difference would be. The steps behind the number are set out in how the annual cost is calculated.
The registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 69 gallons. The rated volume is 47 gallons. These figures describe a household whose busiest hour stays within 69 gallons of hot water. A home whose peak hour needs more than that falls outside what the rating covers. The registry gives no figure for that case, so any shortfall is not available here. The class comparison uses only electric tanks tested at the medium pattern. A home with a different fuel or usage level falls in another class, and the selector by fuel, space and size lists those classes.
The running cost is not written here because it depends on your own utility electricity tariff. The cost calculator on your own ZIP multiplies 866 kWh by the rate for your ZIP. The same method applies to the class median of 3,531 kWh. The gap of 2,665 kWh therefore carries into cost at whatever rate you pay. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. To compare this unit with others in its class of 426 models, you can find a same-class replacement by model number.
DOE CCD · 2026-09-19