Details come from the older review, the maker’s claims and the Amazon listing, checked on October 11, 2026. Output and coverage numbers are maker claims. The older review sold through a dealer, and this page now links to Amazon only.
The AprilAire Model 700 is one of the strongest whole-house humidifiers you can buy. It sits on your furnace and humidifies every room. Here is what it does, what it needs and how it compares.
Table of Contents
What You Get
Price on Amazon: $524.99 | 4.6 stars from 1,138 ratings (checked October 11, 2026)
Design and Size
The 700 is made to be installed on the warm air supply plenum of your furnace, so it is out of sight. The older review measured it at about 15.9 by 15.9 by 10.3 inches and 9 pounds. It has no bucket, so it is compact. A qualified HVAC technician should install it.
Looking ahead, whole-house humidifiers like the AprilAire 700 are becoming a standard add-on for tight, well-insulated homes that dry out fast in winter. Digital controllers that read outdoor temperature and adjust on their own are the next step. The catch is that a unit tied to your furnace is a system, not an appliance, and it needs a pro to install and a pad change each year.
Features and Performance
- Evaporative, fan-powered. It runs with your heating and cooling system and spreads humidified air through the ducts.
- Output. The older review said up to 18 gallons a day for spaces up to 4,200 square feet. The Amazon listing rates it for up to 5,300 square feet, so check the maker data for your home.
- Two versions. One has a manual humidity control, and the other adds a digital controller that holds a set humidity level by itself.
- Controls. The digital model shows the indoor humidity, on and off status and a water panel change light.
- Drain. It has a built-in drain to flush mineral build-up.
The risk to watch is too much humidity. A strong whole-house unit that is set too high can fog windows, rot frames and feed mold inside walls and attics. Mineral scale can also clog a water panel in hard water areas. Expect more smart controls, but set the humidistat by the outdoor temperature, check windows for fog and change the water panel on time.
Noise and Upkeep
You can barely hear the motor and fan on a slow setting, but it is louder on the fastest. Change the water panel about twice a year, per the older review. It listed the panel around $17, so check the current price. A heating contractor can service it with the furnace. See whole-house vs portable humidifiers for the trade-offs, and check humidity with one of the indoor hygrometers.
AprilAire 700 vs Other Whole-House Units
The AprilAire 600M and Honeywell HE360A are the closest rivals. The 600M is manual and costs about half as much. See our AprilAire 600M review and Honeywell HE360A review. For the full list, read whole-house humidifiers.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 11, 2026.
Price on Amazon: $524.99 | 4.6 stars from 1,138 ratings (checked October 11, 2026)
The AprilAire 700 is the model reviewed here. The Amazon listing calls it an automatic, fan-powered unit for homes up to 5,300 square feet. It has a 4.6 rating from about 1,100 ratings.
Price on Amazon: $247.58 | 4.7 stars from 979 ratings (checked October 11, 2026)
The AprilAire 600M is a manual bypass unit. It has a 4.7 rating from about 980 ratings. See our AprilAire 600M review.
Price on Amazon: $229.99 | 4.6 stars from 1,640 ratings (checked October 11, 2026)
The AprilAire 500M has a 4.6 rating from about 1,640 ratings.
Price on Amazon: $333.97 | 4.4 stars from 292 ratings (checked October 11, 2026)
The Honeywell HE360A is a powered flow-through humidifier with a 4.4 rating from 292 ratings. See our Honeywell HE360A review.
Pros and Cons
Pros: covers a large area; built-in drain to flush minerals; digital controller on one version; water panel change indicator; out of sight; efficient water use.
Cons: needs professional installation; water panel replaced regularly; loud on the fastest setting; higher price than bypass units.
FAQ
Does the AprilAire 700 need a pro to install?
Yes. It connects to the furnace, the water line and a drain, so use an HVAC technician.
How often do you replace the water panel?
The older review said about twice a year. Follow the maker schedule.
What humidity should you set?
Many homes run 30 to 40 percent in winter, lower in very cold weather so windows do not fog.
Final Word
The 700 is a top choice for a large forced-air home. Hire a pro, pick the digital version if you want set-and-forget, and set the humidity by outdoor temperature.
What happens next: expect more units that tie into smart thermostats and adjust to the weather, and more water-saving designs. For a big forced-air home, the 700 is still among the strongest options.
Related Guides
Keep going with whole-house humidifiers, AprilAire 600M review, whole-house vs portable humidifiers, Honeywell HE360A review and indoor hygrometers.
