AprilAire E100 100 Pint Whole House Dehumidifier

AprilAire E100 100 Pint Whole House Dehumidifier

The AprilAire E100 100 Pint Whole House Dehumidifier is a professional-grade humidity control system designed for whole-home moisture management, basements, crawl spaces, and stand-alone applications. With the ability to remove up to 100 pints of moisture per day at 80°F and 60% RH, the E100 helps reduce excess humidity, musty odors, mold growth conditions, and moisture-related damage to the structure and belongings.

The E100 uses a blower to pull air through a washable MERV 8 filter and a sealed R32 refrigeration system. The system cools incoming air below its dew point to remove moisture, drains the condensate away, then reheats and returns drier air back into the home. It can be ducted to the HVAC system, ducted to dedicated grilles, or installed as a stand-alone dehumidifier depending on the application.

In simple terms: This is a high-capacity whole-house dehumidifier that removes moisture automatically and drains it away continuously, helping keep the home, basement, or crawl space dry and protected.

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Why Whole-House Dehumidification?

Your air conditioner removes some moisture, but it is built to cool, not to dry. In humid climates, and especially in spring and fall when the AC barely runs, indoor humidity often climbs above 60%. That leads to a clammy feel, musty smells, mold and mildew, dust mites, warped wood floors, and higher cooling bills because damp air feels warmer.

A portable dehumidifier only treats one room and needs its bucket emptied. The E100 connects to your ductwork (or runs stand-alone in a basement or crawl space) and dries the air across the whole home, quietly and automatically, with water drained away continuously.

Why Choose the AprilAire E100

• One unit for the whole home: Handles homes up to about 5,500 sq. ft. depending on climate and how tight the home is.
• ENERGY STAR Most Efficient: Removes more water per kilowatt-hour than standard dehumidifiers, which keeps running costs down.
• Feel cooler at a higher thermostat setting: Drier air feels more comfortable, so many homeowners can raise the AC setting and still stay comfortable.
• Flexible install: Ducted to HVAC, ducted to dedicated grilles, or stand-alone in a basement or sealed crawl space.
• No bucket to empty: Continuous drainage with a patented backflow drain insert, so no P-trap is needed.
• Fresh-air ready: Supports ASHRAE 62.2 ventilation with compatible AprilAire accessories.
• Made by AprilAire: A trusted indoor air quality brand from Madison, Wisconsin, widely used by HVAC and crawl space contractors.
• Backed by a 5-year warranty: Defective parts are replaced free by AprilAire for five years from installation.

E100 or E070: Which One Do I Need?

Whole house, ducted to HVAC	E100 (this unit)
Large basement or wet crawl space	E100 (this unit)
Sealed crawl space up to ~2,200 sq. ft., stand-alone	The smaller AprilAire E070 is usually enough

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Best Applications / Uses

• Whole-home humidity control: Designed to manage humidity throughout larger residential spaces.
• Basements: Helps reduce dampness, musty odors, and moisture buildup.
• Crawl spaces: Suitable for sealed crawl space moisture control systems.
• HVAC ducted installations: Can be connected to the HVAC system when installed properly.
• Dedicated grille installations: Can operate through dedicated return and supply ducting.
• Stand-alone use: Can be placed in suitable spaces where ducting is not required.
• Fresh-air ventilation setups: Supports ASHRAE 62.2 ventilation when configured with compatible accessories.

Key Benefits

• 100 pint moisture removal: Removes up to 100 pints per day at 80°F and 60% RH.
• High performance at lower test conditions: Removes 85 pints per day at 73°F and 60% RH.
• ENERGY STAR Most Efficient: Built for strong moisture removal with efficient operation.
• Whole-home capable: Designed for larger humidity control applications beyond one room.
• Flexible installation: Supports HVAC ducting, dedicated ducting, or stand-alone operation.
• Strong airflow: Delivers up to 280 CFM at 0.0" external static pressure.
• High static capability: Supports up to 0.6" w.c. external static pressure.
• Built-in digital control: Field-interchangeable top or front-mounted control with rotatable display.
• Air sampling logic: Automatically samples air and runs only when dehumidification is needed.
• Two-zone capable: Supports primary and secondary dehumidification zones with compatible dampers.
• Fresh-air ventilation capable: Supports ASHRAE 62.2 ventilation when installed with compatible ventilation accessories.
• Continuous drainage: No water bucket to empty.
• No P-trap required: Patented backflow drain insert simplifies drainage setup.
• Corrosion-resistant aluminum coils: Built for long-term use in humid environments.
• Quiet ducted operation: Rated at 55 dBA when ducted.

Typical Uses

• Whole-house humidity management
• Basement moisture control
• Sealed crawl space dehumidification
• Mold and mildew prevention support
• Musty odor reduction
• Indoor comfort improvement
• Moisture protection for wood framing, finishes, and stored items

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Complete Specifications

Brand	AprilAire
Model	E100
Product Type	Whole House Dehumidifier
Capacity @ 80°F / 60% RH	100 pints/day
Capacity @ 73°F / 60% RH	85 pints/day
Coverage Guideline	Up to approximately 5,500 sq. ft. depending on climate, home tightness, and moisture load
Region A Coverage	4,000 sq. ft. loose home to 5,500 sq. ft. tight home
Region B Coverage	3,200 sq. ft. to 5,000 sq. ft.
Region C Coverage	2,000 sq. ft. to 3,000 sq. ft.
Airflow @ 0.0" w.c.	280 CFM
Airflow @ 0.2" w.c.	245 CFM
Airflow @ 0.4" w.c.	210 CFM
Airflow @ 0.6" w.c.	175 CFM
Maximum External Static Pressure	0.6" w.c.
Energy Factor @ 80°F / 60% RH	2.6 L/kW-h
Energy Factor @ 73°F / 60% RH	2.35 L/kW-h
ENERGY STAR Certification	ENERGY STAR Most Efficient
Power Supply	120 VAC, 1 Phase, 60 Hz
Current Draw	6.7 Amps
Idle Power Consumption	Less than 3 Watts
Noise Level	55 dBA ducted
Dimensions	14" W × 15" H × 26" L
Unit Weight	64 lbs
Shipping Weight	82 lbs
Refrigerant	R32 A2L
Evaporator & Condenser Coils	Corrosion-resistant aluminum
Cabinet Insulation	1/2" EPS
Discharge Air Temperature Rise	10°F–30°F
Duct Connections	10" inlet and outlet with backdraft damper
Power Cord	8 ft plug-in cord for E100/E100C
Drain Connection	3/4" MNPT threaded connection
Drain System	Patented backflow drain insert; no P-trap required
Filter	Washable MERV 8 Filter #5881
Optional Filter Upgrade	MERV 11 Filter #5947
Dehumidification Operating Range	50°F–104°F inlet air, 40°F minimum dew point
Ventilation Operating Range	40°F–140°F, 0–99% RH non-condensing
Warranty	5-Year Manufacturer Limited Warranty (parts)

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Advanced Features

• Automatic Digital Controller: Built-in humidity controller automatically maintains the selected humidity level.
• Field-Interchangeable Display: User interface can be mounted on the front or top of the cabinet and rotated 180°.
• Automatic Air Sampling: Samples air for 3 minutes, dehumidifies until humidity drops 3% below the set point, then checks again every hour.
• Two-Zone Dehumidification: Supports primary and secondary zones using compatible normally-open or normally-closed dampers.
• Fresh Air Ventilation: Supports ASHRAE 62.2 fresh-air ventilation with compatible accessories.
• Ventilation Modes: Supports VENT-TIMED, VENT-AUTO-B, VENT-AUTO-C, and VENT-AUTO-D operating modes.
• Outdoor Temperature Control: Compatible with optional outdoor temperature sensor to optimize ventilation.
• DEH with AC Logic: Allows dehumidification to run with or pause during air conditioner operation.
• Humidity Offset Adjustment: Adjustable RH calibration from -5% to +5%.
• Diagnostic Display: Displays service and troubleshooting codes E1–E9.
• Bubble Level: Built-in level simplifies proper installation.
• Hand-Adjustable Feet: Makes leveling the cabinet easier during installation.
• Backdraft Damper: Factory-installed at the outlet to improve airflow performance.
• Helium Leak Tested: Refrigeration system is factory leak tested for reliability.

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What's Included

• AprilAire E100 Dehumidifier
• 10-inch inlet duct collar
• 10-inch outlet duct collar with backdraft damper
• Installation instructions
• Owner's manual
• Threaded barbed drain fitting
• Torx bit
• Mounting screws
• Drain tubing, model dependent

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Compatible Accessories

• AprilAire Model 76 Remote Dehumidifier Control
• AprilAire 8920W IAQ Control
• AprilAire S86WMUPR Smart Thermostat
• AprilAire 4856 Condensate Pump, 22 ft lift
• AprilAire 5958 Pump Bracket
• AprilAire 5822 Hanging Kit, 200 lb capacity
• AprilAire 5879 Riser Kit
• AprilAire 5546 Living Space Duct Kit
• AprilAire 6510 Normally Closed Damper
• AprilAire 6610 Normally Open Damper
• AprilAire 8190FF FreshFlo Ventilation Damper
• AprilAire 8052 Outdoor Temperature Sensor
• Replacement MERV 8 Filter #5881
• MERV 11 Upgrade Filter #5947
• Wi-Fi User Interface Upgrade Kit #70000238

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Installation Notes

• Professional installation recommended: Have the unit installed by a qualified HVAC contractor to keep the AprilAire warranty valid.
• Indoor installation only: The E100 is designed for indoor applications including whole-home, basement, and crawl space installations.
• Allow two-person lifting: The unit weighs approximately 64 lbs and should be handled carefully during installation.
• Install level: Use the built-in bubble level and adjustable feet to ensure proper condensate drainage.
• Remove shipping bracket: Remove the compressor shipping bracket before placing the unit into service.
• Wait before startup: If the unit has been transported or stored on its side, allow it to stand upright for at least 24 hours before operating.
• Preferred HVAC connection: Return-to-return ducting is the recommended installation method. Return-to-supply, dedicated grille, and stand-alone installations are also supported.
• Use 10-inch ductwork: Install 10-inch inlet and outlet ducts and insulate ductwork located in unconditioned spaces.
• Maintain airflow: Keep a minimum of 12 inches of flexible duct at both inlet and outlet and maintain at least 4 inches of straight duct after the outlet for proper backdraft damper operation.
• Maximum external static pressure: Do not exceed 0.6 inches water column.
• Service clearance: Allow approximately 15 inches of clearance for filter removal and side-panel servicing.
• Continuous drainage: Install the supplied threaded drain fitting and maintain a constant downward drain slope.
• Keep drain insert installed: The patented backflow drain insert eliminates the need for a P-trap and should remain installed during operation.
• Optional condensate pump: The AprilAire Model 4856 condensate pump can lift water up to 22 feet where gravity drainage is unavailable.
• Finished-space protection: Install above a drain pan with a float switch when installed above finished living spaces.
• Suspended installations: Hanging kits and riser kits are available for attic and elevated installations.
• Hardwired version: The E100H model requires hardwired electrical connections in accordance with NEC and local electrical codes.

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Maintenance

• Clean the filter every 6 months: The controller displays a CLEAN FILTER reminder to simplify scheduled maintenance.
• Wash the filter: Rinse the washable MERV 8 filter with clean water and allow it to dry before reinstalling.
• Install correctly: Always reinstall the filter with the airflow arrow pointing toward the unit and ensure both filter doors latch securely.
• Inspect the drain: Check the drain tubing regularly to ensure unrestricted condensate flow.
• Clean the drain insert: Remove the patented drain insert and wash it with mild detergent before reinstalling.
• Flush the drain: Pour approximately one cup of white vinegar through the drain access during routine maintenance to help prevent buildup.
• Factory-sealed refrigeration system: The refrigeration system is sealed and should only be serviced by qualified factory-authorized technicians.

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Warranty, Shipping & Returns

5-Year Manufacturer Limited Warranty: AprilAire (Research Products Corporation) warrants the E100 against defects in materials and workmanship for five (5) years from the date of installation. If a component is defective, AprilAire will supply a replacement part at no charge.

• Labor costs are not covered by the manufacturer warranty.
• The unit should be installed by a qualified heating and air conditioning contractor. Defects caused by not having the unit professionally installed are not covered.
• Filters and other consumables, misuse, and damage from improper installation or outside events are not covered.
• Register your unit with AprilAire after installation to make any future claim easier.
• Full terms are in the AprilAire owner's manual included with the unit.

Free Shipping: This dehumidifier ships free from D7 Supply.

Returns: Return requests are accepted within 30 days of delivery. Items arriving damaged, incorrect, or missing are made right at no cost to you. Please see our Return Policy for full details.

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Common Questions

Q: What warranty comes with the AprilAire E100?
A: It comes with AprilAire's 5-Year Manufacturer Limited Warranty, starting from the date of installation. Defective parts are replaced free. Labor is not included, and the unit should be installed by a qualified HVAC contractor to keep the warranty valid.

Q: Is shipping free?
A: Yes. D7 Supply ships the E100 free of charge.

Q: How much moisture does the AprilAire E100 remove?
A: The E100 removes up to 100 pints of moisture per day at 80°F and 60% RH, and 85 pints per day at 73°F and 60% RH.

Q: What size home can the E100 cover?
A: Depending on climate, home tightness, and moisture conditions, the E100 can serve homes ranging from approximately 2,000 to 5,500 square feet. Coverage should be considered a sizing guideline rather than a guarantee.

Q: What indoor humidity should I aim for?
A: Most experts recommend keeping indoor humidity between about 40% and 50%, and below 60% in basements and crawl spaces, to limit mold, dust mites, and musty odors.

Q: Can the E100 connect to my HVAC system?
A: Yes. The E100 is specifically designed for ducted whole-house installations. Return-to-return ducting is the preferred installation method, although return-to-supply, dedicated grille, and stand-alone installations are also supported.

Q: Can I use it in a crawl space or basement without ductwork?
A: Yes. The E100 can run stand-alone in a basement or sealed crawl space, which makes it a good choice for larger or wetter spaces than the 70-pint E070 can handle.

Q: Is the AprilAire E100 ENERGY STAR certified?
A: Yes. The E100 is recognized as an ENERGY STAR Most Efficient dehumidifier, delivering high moisture removal with excellent energy efficiency.

Q: Does the E100 require a water bucket?
A: No. The unit is designed for continuous drainage using the supplied drain connection or an optional condensate pump.

Q: Which filter does the E100 use?
A: The standard filter is the washable MERV 8 Filter #5881. An optional MERV 11 Filter #5947 is also available.

Q: How often should the filter be cleaned?
A: AprilAire recommends checking and cleaning both the filter and drain every six months, or more frequently in dusty environments.

Q: What refrigerant does the E100 use?
A: The unit uses R32 refrigerant in a factory-sealed refrigeration system.

Q: Can I monitor or control the unit remotely?
A: Yes. The E100 is compatible with the AprilAire Model 76 remote control and compatible IAQ controls. The E100W model additionally provides Wi-Fi connectivity and Healthy Air App monitoring.

Q: Does the E100 support fresh-air ventilation?
A: Yes. When installed with compatible ventilation accessories, the E100 supports ASHRAE 62.2 fresh-air ventilation strategies.

Q: What is the difference between the E100, E100C, E100H, and E100W?
A: All models deliver the same dehumidification performance. The E100C includes factory-installed casters, the E100H is designed for hardwired electrical installation, and the E100W adds Wi-Fi connectivity, a color display, Bluetooth provisioning, and Healthy Air App control.