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Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up vs AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier

Updated August 2026The Aprilaire 720MKZ offers superior capacity and efficiency, making it the better choice for larger homes, while the Model 400 is more budget-friendly for smaller spaces.

The Aprilaire 720MKZ offers superior capacity and efficiency, making it the better choice for larger homes, while the Model 400 is more budget-friendly for smaller spaces.

Why Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up is better

lower price

C$407.00 vs C$817.99

smaller size

suitable for homes up to 4,000 sq ft

automatic operation

set it and forget it with dual sensors

Why AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier is better

higher capacity

21 gallons per day vs 17 gallons per day

sustainability

60% less wastewater compared to similar models

easier maintenance

one-piece HydroCore water panel for quick replacement

Overall score

Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up
75
AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier
85

Specifications

SpecAprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier
BrandAprilaireAprilaire
Current PriceC$407.00C$817.99
Moisture Output17 gallons/day21 gallons/day
Water Wastestandard60% less
Control Typeautomaticmanual
Installation Flexibilitystandardreversible design

Dimension comparison

Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier

Overview of Whole House Humidifiers

When it comes to enhancing indoor air quality, whole house humidifiers play a crucial role. The Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier and AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier are two prominent options on the market. Each model boasts unique features aimed at improving humidity levels and overall comfort in your home.

The Aprilaire Model 400 is designed for efficient operation, covering up to 4,000 square feet and providing a moisture output of 17 gallons per day. In contrast, the AprilAire 720MKZ is engineered for larger spaces, delivering an impressive 21 gallons per day, making it suitable for bigger homes.

Features and Benefits

Both humidifiers offer substantial benefits, but their features cater to different needs. The Aprilaire Model 400 focuses on maintaining optimal humidity levels with its dual sensors that monitor indoor and outdoor conditions, ensuring consistent performance. It also conserves water through a unique evaporation process.

On the other hand, the AprilAire 720MKZ highlights its sustainability features, boasting 60% less wastewater compared to similar models. It includes a one-piece HydroCore water panel for easy maintenance and an efficient hybrid fan that maximizes air distribution, enhancing its overall effectiveness.

Pricing Comparison

Price is a significant factor when choosing between the two models. The Aprilaire Model 400 is priced at C$407.00, making it a more budget-friendly option for those looking to improve humidity without breaking the bank. In contrast, the AprilAire 720MKZ comes with a higher price tag of C$817.99, reflecting its advanced features and greater capacity.

For homeowners with larger spaces who require more robust humidity control, the investment in the 720MKZ may be justified. However, for smaller homes or those on a budget, the Model 400 offers essential functionality at a more accessible price.

Ease of Installation

Installation can significantly impact your overall satisfaction with a humidifier. The Aprilaire Model 400 is designed for straightforward setup, allowing homeowners to enjoy its benefits quickly. Its automatic operation means once it's installed, users can set it and forget it, thanks to its dual monitoring sensors.

Conversely, the AprilAire 720MKZ also boasts an easy installation process, with a reversible fan design that allows flexibility in positioning. It features a manual control that measures humidity changes and can be wall-mounted, providing additional convenience for users who prefer manual adjustments.

Maintenance Requirements

Maintenance is crucial for the longevity of any humidifier. The Aprilaire Model 400 is designed to be efficient and requires minimal upkeep, focusing on conserving water and ensuring optimal humidity through its automatic features. However, regular checks on the system are recommended to maintain performance.

The AprilAire 720MKZ simplifies maintenance further with its one-piece HydroCore water panel, which is quick to replace. This model emphasizes sustainability and efficiency, reducing water waste and ensuring that maintenance is not a cumbersome task.

Health Benefits

Maintaining proper humidity levels in your home is essential for health. The Aprilaire Model 400 promotes a humidity range of 35% to 45%, which can reduce the incidence of respiratory infections and alleviate symptoms related to allergies and asthma. This model is particularly beneficial in improving comfort during colder months by allowing homeowners to lower heating costs while maintaining warmth.

The AprilAire 720MKZ also prioritizes health, offering enhanced capacity and efficiency in humidification. Its design is part of a broader Healthy Air System that addresses multiple aspects of indoor air quality. By effectively managing humidity, it contributes to a healthier living environment.

Energy Efficiency

Energy consumption is an important consideration for homeowners. The Aprilaire Model 400 is designed to provide effective humidification while conserving water and energy. By maintaining proper humidity, it can help reduce heating costs, making it a cost-effective option for those concerned about energy bills.

The AprilAire 720MKZ claims to offer 2X more evaporative efficiency compared to other models in its class. This means that while it uses more water due to its higher output, it maximizes moisture distribution effectively, which can lead to energy savings in larger homes.

Which should you buy?

Choosing between the Aprilaire Model 400 and the AprilAire 720MKZ ultimately depends on your specific needs. If you have a smaller home and are looking for an affordable, efficient solution, the Model 400’s price of C$407.00 and comprehensive features make it an excellent choice. However, for those with larger homes requiring more robust humidification, the AprilAire 720MKZ, despite its higher cost of C$817.99, offers enhanced capacity and efficiency that may be worth the investment. Consider your space, budget, and humidity needs carefully to make the best choice for your home.

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Aprilaire Model 400 Automatic Whole House Water Saver Furnace Humidifier for up vs AprilAire 720MKZ Whole House Fan Powered Evaporative Humidifier | versusfinder