AHAM vs Saturation Pints Explained: How Dehumidifier Ratings Actually Work

If you’ve ever wondered how one brand’s “120-pint” dehumidifier costs $600 while another brand’s “70-pint” costs $1,500, the answer isn’t magic or markup. It’s two different tests, and the industry lets both numbers live on boxes side by side.

What AHAM pints actually are

AHAM — the Association of Home Appliance Manufacturers — defines the standard dehumidifier test: pints of water removed per day at 80°F and 60% relative humidity. That’s a realistic hot, humid summer day. When a unit says 70 AHAM pints, it means: in a controlled room at 80°F/60% RH, it pulled 70 pints of water out of the air in 24 hours.

This is the number the Energy Star program uses. It’s the number serious sizing guides use. It’s the only number that lets you compare two units fairly, because the test conditions are identical.

What “saturation” numbers are

Some manufacturers — AlorAir most prominently — lead their marketing with pints measured at saturation conditions, roughly 90°F and 90% relative humidity. At those conditions, the air is practically dripping; nearly any dehumidifier will pull far more water than it would at 80/60. The result: capacity numbers that run roughly 2x the AHAM figure for the exact same machine.

This isn’t fraud — the number is usually real under those extreme conditions. But it’s a different test that flatters the product, and it makes cross-brand comparison impossible unless you know to translate.

The translation table: AlorAir’s real numbers

AlorAir publishes both numbers in its specs, which makes the ratio transparent:

So when you see the HD55 advertised as a “120-pint” unit at ~$506–638, you’re looking at a 55-pint AHAM machine — excellent value at that price, but not double the capacity of a 70-pint AHAM AprilAire E070. Same sport, different scoreboard.

Who markets which way

• AprilAire: AHAM numbers front and center. The E070 is 70 pints, the E100 Pro is 100 pints — what you see is what the AHAM test measured. No translation required.
• Santa Fe: Also AHAM. The Compact70 is 70 AHAM pints, the Advance90 is 90 AHAM pints.
• AlorAir: Saturation numbers in the headlines (120, 198), AHAM figures in the spec sheets (55, 90). The units are genuinely good value — but you have to do the translation yourself.

This split is the single biggest source of confusion in dehumidifier shopping. A buyer comparing a “198-pint” AlorAir HDi90 ($1,032–1,147) against a “100-pint” AprilAire E100 Pro ($2,015–2,300) might think AlorAir offers double the capacity at half the price. In AHAM terms it’s 90 vs 100 — close competitors, with the price gap reflecting efficiency, build, warranty, and channel, not a 2x capacity chasm.

How to compare any two units fairly

1. Find the AHAM line. It’s in the spec sheet, usually labeled “AHAM pints/day” or “pints/day @ 80°F/60% RH.” Ignore the headline number until you’ve found it.
2. Convert saturation to AHAM. If only a saturation number is given, divide by ~2 as a rough translation — and treat it as an estimate, not a spec.
3. Compare AHAM to AHAM. Now the capacity question is settled, and you can judge everything else: efficiency (Energy Star / Most Efficient), warranty, drainage options, filtration, and price.
4. Size from AHAM. Our rule of thumb — ~10 AHAM pints per 500 sq ft in humid climates, plus 20–30% headroom — only works with AHAM numbers. Feeding it saturation numbers will undersize your system badly.

Why this matters beyond the purchase

An undersized unit doesn’t just underperform — it runs constantly, wears faster, and still leaves corners of the house humid. Most “my dehumidifier doesn’t work” stories trace back to a capacity misunderstanding, and the AHAM/saturation split is the #1 cause. Get the numbers right and the rest of the buying decision — see our how-to-choose guide — gets dramatically simpler.

The mislabeling trap: a worked example

Consider a real shopping scenario. You need ~70 AHAM pints for a 2,000 sq ft Southeast home (see our sizing guide). You find two units:

• Unit A — “70-pint” at ~$1,550 (AprilAire E070, AHAM-rated)
• Unit B — “120-pint” at ~$600 (AlorAir HD55, saturation-rated)

Unit B looks like nearly double the capacity at a third of the price. Translated to AHAM, Unit B is 55 pints — actually less capacity than Unit A. It’s still a good deal (55 AHAM pints for ~$600 is strong value), but the comparison you thought you were making never existed. This is why every sizing table, ranking, and recommendation on this site uses AHAM pints exclusively: it’s the only scoreboard where the game is fair.

Quick-reference decoder card

Pin this to your shopping notes:

• AHAM pints = 80°F / 60% RH = the comparable number. Use for sizing.
• Saturation pints = ~90°F / 90% RH ≈ 2× AHAM = the marketing number. Decode before comparing.
• AprilAire / Santa Fe → headline number IS the AHAM number.
• AlorAir → headline number ÷ ~2.2 ≈ AHAM number (or just read the AHAM line in the specs).
• Sizing, rankings, tools → always AHAM in, always AHAM out.

One last habit worth building: whenever a product page, review, or forum post quotes pints without saying which test, assume saturation and go find the AHAM line before believing the number. The thirty seconds it takes has saved more buyers from an undersized unit than any other single check.

To see the two rating styles in the wild, compare our AprilAire E100 Pro review (100 pints marketed, 85 DOE) with the AlorAir Sentinel HD55 review (120 box pints, 55 AHAM) — same math, different labels. And once you’ve picked your honest capacity number, run it through the capacity sizer tool to match it to your square footage and climate zone.