Dehumidifier Pint Ratings: Three Numbers, One Machine
The dehumidifier pint ratings printed on a machine are not a property of the machine. They are the result of a measurement taken at a particular temperature and humidity, and three different figures circulate for the same unit, taken under three different conditions. They differ by multiples. The largest one usually goes on the box. The smallest one sits in the federal registry.
Three measurement points
65 °F and 60% relative humidity. The current federal method, Appendix X1 to 10 CFR Part 430. This is the figure published in the ENERGY STAR registry, and the one that makes units comparable to each other.
80 °F and 60%. The point in force before 2019. Manufacturers still quote it in product listings, usually without saying so.
95 °F and 90%. A saturation condition, closer to the tropics than to a living room. This point is used for the large numbers in product names. hOmeLabs and Waykar both show it in their own listings; how widespread the practice is across the market we have not counted.
The size of the gap shows up in verifiable cases. Waykar sells the PD160B-PRO as a 34-pint unit, measured at 95 °F and 90% RH; its tested capacity in the ENERGY STAR registry is 10.16 pints per day, a factor of 3.3. hOmeLabs publishes both numbers side by side for one machine: up to 50 pints at 80 °F and 60% RH, a maximum of 120 pints at 95 °F and 90% RH.
Where the 65 degrees came from
Worth asking, because every one of the dehumidifier pint ratings printed on a carton follows from it.
Before 2019, portable dehumidifiers were tested at 80 °F. The current procedure dropped that to 65 °F, a reduction of 15 degrees. The consumer-facing ENERGY STAR page explains it briefly, as reflecting expected performance in a basement setting.
The rule itself gives a fuller account. DOE concluded that a dry-bulb temperature of 65 °F represents the majority of conditions during periods of dehumidifier use, and arrived at the figure through an analysis of ground temperature. It also stated that the same condition is representative of units installed in above-grade living spaces, based on climate data analysis.
Manufacturers pushed back. Aprilaire proposed 68 °F, arguing that 65 runs cool for a basement and that a running dehumidifier warms the room it stands in. Therma-Stor made the same point, that a basement with a dehumidifier working in it sits a few degrees warmer than one without. DOE declined to raise the temperature, citing uncertainty around those effects.
And the detail that matters most here. The 2014 proposal had a different design: test at two temperatures, 65 °F and 80 °F, and combine the results with weights of 79% and 21%. The agency’s own estimate, in other words, put roughly a fifth of real use at the warmer condition. The two-condition approach was dropped to avoid adding test burden.
What that means in Florida
A Florida house in summer sits around 74 to 78 °F. Not 65, not 95. It falls into precisely the share of use that carried a 21% weight in the draft and was then left out altogether.
The practical consequence runs both ways.
The marketing number overstates: 95 °F at 90% RH is a closed garage in August, not a living room.
The federal number understates: in warm humid air the machine collects more than it did on a test bench at 65 °F. How much more depends on the temperature and humidity in a given house, and no conversion factor exists for it.
What remains is a narrow instruction. Compare models on the DOE figure, because it was taken the same way for all of them, and do not read it as a forecast for your own room. Sizing is a separate calculation, handled by the Florida dehumidifier calculator.
Converting old ratings to new ones
If you are replacing a unit bought before 2020, EPA publishes a direct correspondence.
| Portable: through 2019 | From 2020 | Whole-home: through 2019 | From 2020 |
|---|---|---|---|
| 30 | 20 | 80 | 70 |
| 40 | 25 | 100 | 85 |
| 50 | 30 | 120 | 100 |
| 55 | 30–35 | 140 | 115 |
| 60 | 35 | 160 | 135 |
| 70 | 40–45 | 200 | 170 |
| 90 | 55 |
EPA table, Dehumidifier Testing and Capacity. All figures in pints per day. The correspondence is approximate and the actual change varies by model. The table converts between test methods; it is not a list of capacities currently on sale.
Read that alongside the hOmeLabs example above. A unit rated at 50 pints under the 80 °F condition corresponds to roughly 30 pints under the current method. The number in the product name did not change.
The 50-pint ceiling
Among the 511 portable models certified under ENERGY STAR, none is rated above 50.0 pints per day. The top of the list is crowded: 162 records sit at 49 pints or higher, and 50.0 is where they stop.
Alongside that, the certification thresholds rise in steps. Version 6.0 requires an IEF of 1.70 L/kWh up to 25 pints, 2.01 from 25.01 to 50, and 3.30 at 50 pints and above. The step from 2.01 to 3.30 is a 64% increase in required efficiency, and no portable design in the registry meets it.
Two limits on reading that. The registry covers certified products only, so equipment outside the programme is not counted. And the programme itself excludes capacities above 155 pints per day.
How the classes behave in practice is set out on the 50-pint page and in the ENERGY STAR registry breakdown.
How to read a product listing
Look for the conditions next to the number. If it says 95 °F and 90% RH, that is the saturation point. If it says 80 °F and 60%, that is the pre-2019 method. If no conditions appear at all, the number means nothing.
Check the registry. Tested capacity under Appendix X1 is published for every certified model, along with IEF and annual energy use.
Do not compare figures from different points. One machine at 34 pints and another at 50 can easily mean the second is the weaker of the two.
The number in the model code means nothing. The registry holds models carrying 150 in their designation at tested capacities of 50.0 and 49.67 pints per day.
What a unit costs to run is covered on the energy cost page. Brand-level detail sits in the Waykar review and the Kesnos review. Matching a machine to a job is the Florida scorecard.
Frequently asked questions
Why does my dehumidifier collect less water than the box says?
The number on the box was most likely taken at 95 °F and 90% RH. The federal method tests at 65 °F and 60%, and the figure there is several times smaller.
What is the DOE pint rating?
Tested capacity under Appendix X1 to 10 CFR Part 430, measured at 65 °F and 60% relative humidity. It is published in the ENERGY STAR registry and serves as the common basis for comparing models.
Why did dehumidifier capacities drop in 2020?
The test method changed and the test temperature came down from 80 °F to 65 °F. Cooler air holds less moisture, so the same machine reports a smaller capacity.
Is a 70-pint portable dehumidifier real?
Among the 511 portable models certified under ENERGY STAR, none exceeds 50.0 pints per day. A 70 on the box refers to a different measurement condition.
Which pint number should I compare models on?
The DOE figure. It was taken under identical conditions for every unit, while marketing numbers are only comparable within a single listing.
Sources
- DOE test procedure: 10 CFR Part 430, Subpart B, Appendix X1.
- Energy Conservation Program: Test Procedures for Dehumidifiers, Final Rule, Federal Register document 2015-18328. federalregister.gov
- ENERGY STAR, Dehumidifier Testing and Capacity, including the conversion table. energystar.gov
- ENERGY STAR Dehumidifiers Key Efficiency Criteria, Version 6.0, effective 1 October 2025. energystar.gov
- ENERGY STAR Certified Dehumidifiers registry, export dated 31 July 2026.
- Manufacturer listings: Waykar PD160B-PRO and hOmeLabs. homelabs.com