E100 Pro specs
| Brand | AprilAire |
|---|---|
| Capacity (AHAM, 80°F/60% RH) | 100 pints/day |
| Max coverage | 5,500 sq ft |
| Drainage | Gravity drain (duct collars and damper included) |
| Dimensions | 26" L x 14" W x 15" H |
| Weight | 64 lbs |
| Power draw | 6.9A |
| Airflow | 280 CFM |
| Filter | Washable MERV 8 |
| Energy Star | Yes |
| Warranty | 5 years |
| Price tier | $$$ Premium ($2,000–$3,000). See Amazon for today's price. |
- The DOE integrated test rates this unit at 85 pints/day; AprilAire's 100-pint figure is the AHAM rating.
Specs are compiled from manufacturer listings and may change between production runs. Confirm on the retailer page before buying.
The AprilAire E100 Pro is the flagship of AprilAire’s residential line and the best overall whole-house dehumidifier in this comparison. Spec sheets rate it at 100 pints per day by marketing figure (85 pints under the DOE integrated test), with retailer listings positioning it for homes up to 5,500 square feet. It is a 64-pound, 26”L x 14”W x 15”H unit built in the USA, carrying the Energy Star Most Efficient 2025 badge and backed by a 5-year warranty. Where it separates from its siblings is airflow — 280 CFM — and the fact that duct collars and a damper come in the box rather than as extra purchases.
At roughly $2,015–2,300 it is premium money, and it is priced near enough to the E080 that the decision between the two is usually about capacity rather than cost. If you are still deciding what size you need, our whole-house dehumidifier guide and capacity sizer tool are the place to start.
Who the AprilAire E100 Pro is for (and who should skip it)
The E100 Pro is for the owner of a large or very humid home — up to 5,500 square feet per the listings — who wants one unit handling the whole house through ductwork, and who values honest capacity ratings and contractor-grade construction. It is the pick when a smaller unit would be running flat-out all summer: headroom is reliability. It is also the natural choice for crawl-space encapsulation projects and for homes where the HVAC system alone cannot keep summer humidity under control.
Skip it if your space is under about 2,500 square feet — you are paying for capacity you will never use, and the E070 Pro or E080 will do the same job cheaper. Skip it if you cannot drain by gravity and do not want to add an external pump, since there is no internal one. And skip it if you are hoping for a DIY weekend project: ducted installation is real HVAC work, and spec guidance points toward professional installation for ducted setups.
Capacity: the AHAM number vs the box number
The E100 Pro carries a 100-pint marketing number with an 85-pint DOE integrated rating underneath — the honest version of the two-number dance that runs through this whole category. The practical rule is to size on the 85-pint DOE figure and treat the 100-pint number as the comparison shorthand (see AHAM vs saturation pints explained).
Even at the conservative 85 pints, this is the most capacity in AprilAire’s residential line, and it is the unit to buy when you are between sizes. Dehumidifiers lose output as temperature drops — a basement at 65°F produces meaningfully less than the 80°F test lab — so the 85-to-100 spread is a buffer against cooler real-world conditions, not bonus capacity.
Installation and drainage
The E100 Pro is designed for ducted whole-house installation, and the box shows it: duct collars and a damper are included, which saves a separate parts order that sibling models sometimes require. Spec sheets list 26”L x 14”W x 15”H at 64 lbs — compact enough for a crawl space or mechanical room, with 280 CFM of airflow to push treated air through ductwork.
For ducted setups, retailer and manufacturer guidance points to professional installation: tying into HVAC ductwork, setting up the drain run, and placing the digital control all benefit from someone who does this for a living. Freestanding operation is simpler, but buyers of this unit are overwhelmingly installing it ducted. Drainage is gravity-only with no internal pump — owners report the typical install runs to a floor drain or sump, and an external condensate pump is a standard add-on where gravity drainage is unavailable. Factor it into the installed-cost budget.
Noise, energy and running costs
The E100 Pro carries the Energy Star Most Efficient 2025 designation, but it is the hungriest unit in the line: spec sheets show 6.9 amps, against the E080’s 5.1A. That is the price of 280 CFM and 100 pints of capacity — more of everything, including the electric bill at a given duty cycle. On long humid-climate run-times, the difference between this and the E080 adds up over a season, so estimate with our operating cost tool using your local rate and expected duty cycle.
Noise follows the whole-house pattern: published figures assume ducted installation, where the unit lives in a crawl space or utility room and the living space hears very little. Owners report that in normal ducted setups the unit is a background presence, not an annoyance. Freestanding placement near living space will be louder — placement matters more than the spec sheet.
Maintenance
Maintenance is the same low-effort routine as the rest of the AprilAire line: a washable MERV 8 filter that rinses clean and goes back in, with no disposable filter costs. Cleaning frequency depends on the install environment — crawl spaces and dusty mechanical rooms need more frequent rinsing. There is no bucket, no tank, and nothing to descale. The maintenance item that actually matters is the drain line: confirm the gravity hose keeps a clear downhill path and the outlet stays unobstructed, especially in crawl spaces where hoses get kicked and kinked over time.
The 5-year warranty is the line’s standout: most residential dehumidifiers carry 1–2 years, and in a category where owner reports of early compressor failure are the dominant complaint against budget brands, five years of coverage is a material part of what the premium price buys.
At roughly $2,015–2,300, the AprilAire E100 Pro is the most expensive residential unit in this lineup and, for most large homes, the right one: 100 pints of honestly rated capacity, 280 CFM, duct collars and damper in the box, Energy Star Most Efficient 2025, and a 5-year warranty. The costs are real — premium price, 6.9A draw, pro installation for ducted setups, and no pump. But if your home is large enough to need it, check the current price on Amazon: buying more capacity than you strictly need is the cheapest reliability insurance in this category.
Featured in our guides
- The 7 Best Whole-House Dehumidifiers of 2026: Honest Rankings by Capacity, Value & Use Case
- How to Choose a Whole-House Dehumidifier: The 5 Decisions That Matter
- AprilAire vs AlorAir vs Santa Fe: Which Whole-House Dehumidifier Brand Wins?
- AprilAire E100 vs E130: Which Whole-House Dehumidifier Should You Buy?