AprilAire 720MKZ Whole-House Fan-Powered Humidifier
- 21 gallons per day output
- Up to 6250 sq ft of home coverage
- Fan-powered evaporative design, manual control included
- Duct or wall mount compatible control
- 120 volts AC, 24 VAC transformer included
- 5-year warranty
- 16.5 x 11 x 18 inches, 13.8 pounds
Last refreshed Sep 24, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A fit for a larger home that needs even humidity in every room. Setup involves water, drain and control wiring, so treat it as an installation project rather than a plug-in.
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ASIN: B0DCDPGQ18Model: 720MKCategory: Humidifiers
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Overview
Not a portable room humidifier, the AprilAire 720MKZ is a whole-house unit that connects to the home's water supply and drain. A hybrid fan moves air across a disposable evaporative HydroCore cartridge.
A recirculation valve cuts wastewater, and the one-piece cartridge simplifies annual maintenance. The fan spreads the moisture evenly through the home. The limitation is the install effort and the manual control, which is set by hand.
Who it's for
Owners of a large house who are ready for a plumbed installation and a wall or duct mounted control. Renters, and anyone who wants to move a unit between rooms, should choose a portable model.
Pros and cons
- Covers a very large home
- Water saving recirculation valve
- Disposable HydroCore simplifies service
- Leak protection and auto shut off
- Needs plumbing and wiring install
- Manual control only
- Cartridge replaced periodically
Performance notes
Water runs across an evaporative cartridge while a hybrid fan pushes air through it, so output depends on the water supply, air flow and the humidistat setting. Auto shut off and a service filter indicator help with upkeep, and the reversible design allows several installation layouts.
Specifications
| Brand | Aprilaire |
|---|---|
| Model | 720MK |
| Dimensions & fit | |
| Item Dimensions D X W X H | 16.5 inches D x 11 inches W x 18 inches H |
| Item weight | 13.8 pounds |
| Capacity & performance | |
| Capacity | 21 gallons per day |
| Power & efficiency | |
| Voltage | 120 volts AC, 24 VAC transformer |
| Construction & materials | |
| Material | Plastic, polycarbonate |
| Warranty & support | |
| Warranty Description | 5 years |
| Other details | |
| Floor Area | 6250 sq ft |
| Operation Mode | Fan-powered evaporative |
| Filter Type | Disposable HydroCore evaporative cartridge |
| Control | Manual control, duct or wall mount |
Closest rivals on specs
Levoit LV600S Smart Warm and Cool Mist Humidifier- Floor Area 6250 vs 753 sq ft (+730%)
Levoit Smart Humidifier 6.2L- Floor Area 6250 vs 536 sq ft (+1066%)
Vicks V745 Warm Mist Humidifier- Floor Area 6250 vs 500 sq ft (+1150%)
Frequently asked questions
What is in the box with the AprilAire 720MKZ humidifier?
The listing names the humidifier, the 4655 manual control, a HydroCore cartridge, a transformer, a saddle valve, push to connect adapters, wire nut connectors, thermostat wire, drain tube, supply tube, a hose clamp, self-drilling screws, an owner's manual and an installation template.
Is the AprilAire 720MKZ a portable humidifier?
No. It is a whole-house unit installed with a saddle valve, supply and drain tubing and control wiring.
Does the AprilAire 720MKZ need a water connection?
Yes. The kit includes a saddle valve and supply tube, along with a drain tube, so it runs from the home's water line.