
Honeywell Humidipro Manual: A Comprehensive Guide
This manual provides detailed instructions for operating and maintaining your Honeywell Humidipro humidifier, ensuring optimal performance and longevity.
It covers everything from initial setup to advanced features, troubleshooting, and warranty information,
helping you create a comfortable and healthy indoor environment.
Understanding your Humidipro model and following these guidelines will maximize its benefits.
The Honeywell Humidipro represents a significant advancement in home humidity control, utilizing ultrasonic technology to deliver a fine, cool mist that quickly and efficiently increases moisture levels. Unlike traditional humidifiers, the Humidipro operates quietly, making it ideal for bedrooms, nurseries, and living spaces where noise is a concern. This manual serves as your comprehensive resource for understanding and maximizing the benefits of your Humidipro unit.
Designed for ease of use and maintenance, the Humidipro offers intuitive controls and features like automatic humidity control and timer settings. It’s more than just a humidifier; it’s a system designed to enhance your indoor air quality and overall well-being. Whether you’re combating dry winter air or seeking relief from allergy symptoms, the Humidipro provides a comfortable and healthy atmosphere. This guide will walk you through every step, from initial setup to troubleshooting, ensuring a seamless experience.
What is the Honeywell Humidipro Used For?
The Honeywell Humidipro is primarily designed to combat the effects of dry air, a common issue, especially during winter months when heating systems reduce indoor humidity. Low humidity can lead to dry skin, irritated sinuses, chapped lips, and increased susceptibility to colds and respiratory infections. The Humidipro effectively alleviates these discomforts by adding moisture back into the air.
Beyond basic comfort, the Humidipro offers benefits for your home and belongings. Maintaining optimal humidity levels can help preserve wooden furniture, flooring, and musical instruments, preventing cracking and warping. It can also reduce static electricity, making your home more comfortable and reducing the risk of shocks. Furthermore, proper humidity can contribute to a healthier indoor environment, potentially easing allergy and asthma symptoms. Ultimately, the Humidipro is a versatile solution for improving your overall quality of life.
Humidipro Models: Identifying Your Unit
Honeywell offers several Humidipro models, each designed to cater to different room sizes and humidity needs. Identifying your specific model is crucial for accessing the correct documentation and ensuring proper operation. Key differentiators include tank capacity, coverage area (in square feet), and the features offered on the control panel.
Common models include the HM750, HM550, and HM350. The HM750 typically features a larger tank for extended runtime and a wider coverage area, suitable for larger homes. The HM550 offers a balance of capacity and features, while the HM350 is ideal for smaller spaces. Locate the model number on the unit’s base or rear panel. This number is essential when contacting customer support or ordering replacement parts. Referencing your model number ensures you receive accurate assistance and compatible components.
Safety Precautions and Warnings
Before operating your Honeywell Humidipro, carefully review these safety guidelines to prevent injury or damage. Always unplug the unit before cleaning or filling the water tank. Never immerse the base of the humidifier in water, as this poses a serious electrical hazard. Use only clean, cool tap water; avoid using distilled or demineralized water, which can damage the unit.
Keep the humidifier out of reach of children and pets. Do not operate the unit if the power cord or plug is damaged. Avoid placing the humidifier near heat sources or in direct sunlight. Regularly inspect the water tank for any signs of cracks or leaks. If you notice any unusual smells or noises, immediately unplug the unit and contact customer support. Proper ventilation is essential; do not use the humidifier in a confined space.

Setting Up Your Honeywell Humidipro
Proper setup ensures efficient operation; Begin by carefully unpacking your Humidipro and selecting a stable, level surface.
Follow the subsequent steps for water reservoir filling and initial power-on procedures for optimal performance.
Initial Installation Steps
Before first use, carefully unpack your Honeywell Humidipro and inspect all components for any shipping damage. Place the unit on a firm, level surface, ensuring adequate space around it for proper ventilation – at least one foot on all sides is recommended. Avoid placing the humidifier directly on wooden floors or near furniture that could be damaged by moisture.
Next, remove the water tank and rinse it thoroughly with clean water. Locate the fill opening and carefully pour in cool, distilled water, avoiding the maximum fill line indicated on the tank. Using distilled water is crucial to prevent mineral buildup and maintain optimal performance. Replace the water tank securely onto the base.
Ensure the unit is plugged into a grounded electrical outlet. Avoid using extension cords if possible. Before powering on, double-check that all components are correctly assembled and the water tank is properly seated. Refer to the diagram in this manual for a visual guide to ensure correct assembly.
Water Reservoir Filling and Maintenance
Regularly filling and maintaining the water reservoir is vital for optimal Humidipro performance and hygiene. Always disconnect the unit from the power outlet before handling the water tank. To refill, remove the tank and empty any remaining water. Use cool, distilled water exclusively to minimize mineral buildup, extending the humidifier’s lifespan and preventing white dust emission.
Fill the tank to the indicated maximum fill line. Avoid overfilling, as this can cause leaks. After filling, securely replace the tank onto the base, ensuring a tight seal. For optimal hygiene, clean the water tank at least once a week with a mild soap and water solution. Rinse thoroughly to remove all soap residue.
Periodically inspect the tank for any signs of algae or mildew growth. If present, use a diluted bleach solution (1 teaspoon bleach per gallon of water) to disinfect, followed by a thorough rinsing.
Powering On and Basic Operation
To begin using your Honeywell Humidipro, ensure the water reservoir is properly filled and securely in place. Connect the power cord to a grounded electrical outlet. Press the power button, typically indicated by a universal power symbol, to turn on the unit. The display panel will illuminate, showing the current humidity level and operating mode.
Initially, the Humidipro may operate at a default setting. Use the control panel buttons to adjust the desired humidity level and fan speed (detailed in subsequent sections). The unit will automatically begin humidifying the air. Monitor the humidity level using the display indicator, aiming for a comfortable range between 30-50%.
Allow several hours for the humidifier to reach the set humidity level, especially in larger rooms. Regularly check the water level and refill as needed to maintain continuous operation.

Understanding the Control Panel
The Honeywell Humidipro control panel features intuitive buttons and a clear display, allowing easy adjustment of settings.
Mastering these controls unlocks the full potential of your humidifier, ensuring optimal comfort and air quality.
Display Indicators and Their Meanings
The Honeywell Humidipro’s display panel utilizes several indicators to communicate the unit’s status and operational mode. Understanding these symbols is crucial for effective use and troubleshooting. A solid power indicator confirms the unit is receiving electricity and is operational. A flashing low water level indicator signals the need to refill the reservoir, preventing damage and ensuring continued humidification.
The humidity level indicator displays the current room humidity, allowing you to monitor and adjust settings accordingly. A target humidity indicator shows the desired humidity level you’ve set. Fan speed indicators illustrate the current fan setting – low, medium, or high – influencing the rate of moisture dispersal. An automatic mode indicator confirms the unit is operating in automatic humidity control, adjusting output based on ambient conditions.
Furthermore, a filter indicator will illuminate when the water filter requires replacement, maintaining water purity and preventing mineral buildup. Error codes, if displayed, indicate specific issues requiring attention; consult the troubleshooting section of this manual for resolution. Regularly checking these indicators ensures optimal performance and longevity of your Humidipro unit.
Adjusting Humidity Levels

The Honeywell Humidipro allows precise control over your indoor humidity, enhancing comfort and well-being. To adjust the humidity level, use the “+” and “-” buttons on the control panel. The display will show the target humidity percentage, typically ranging from 30% to 60%. Lower humidity levels are suitable for warmer months or smaller rooms, while higher levels benefit drier climates or larger spaces.
Consider your personal comfort and the recommendations for optimal health when selecting a humidity level. Maintaining a humidity between 40% and 60% can help alleviate dry skin, sinus irritation, and static electricity. Avoid setting humidity levels too high, as this can promote mold growth.
The Humidipro remembers your last setting, automatically resuming operation at your preferred humidity level upon power-up. Experiment with different settings to find the ideal balance for your environment and enjoy the benefits of personalized humidity control. Regularly monitor the humidity level using a separate hygrometer for accurate readings.
Fan Speed Control
The Honeywell Humidipro features adjustable fan speeds, allowing you to customize the distribution of moisture throughout your room. Typically, the control panel includes buttons labeled “Low,” “Medium,” and “High” to select your desired fan speed. Lower fan speeds are quieter and ideal for nighttime use or smaller spaces, providing a gentle mist. Higher fan speeds distribute moisture more rapidly, suitable for larger rooms or when quicker humidification is needed.
Experiment with different fan speeds to find the optimal setting for your comfort and room size. A higher fan speed may be preferable in drier environments, while a lower speed can prevent over-saturation in smaller areas.
The fan speed setting doesn’t directly impact the target humidity level, but it influences how quickly the Humidipro reaches and maintains that level. Some models offer an “Auto” fan speed, which adjusts automatically based on the current humidity.

Advanced Features and Settings
Explore the Humidipro’s sophisticated options, including automatic humidity control, a convenient sleep mode, and programmable timer settings for personalized, scheduled operation and comfort.
Automatic Humidity Control Mode
The Automatic Humidity Control mode on your Honeywell Humidipro is designed to maintain a consistent and comfortable humidity level within your home without constant manual adjustments. This intelligent feature utilizes a built-in humidity sensor to continuously monitor the ambient air and automatically adjusts the humidifier’s output accordingly.
To activate this mode, simply select the “Auto” setting on the control panel. You can then set your desired humidity percentage – typically between 40% and 60% is recommended for optimal health and comfort. The Humidipro will then work to achieve and maintain that level, cycling on and off as needed.
This mode is particularly beneficial for those who prefer a “set it and forget it” approach to humidity control. It eliminates the guesswork and ensures a consistently comfortable environment, while also potentially saving energy by preventing over-humidification. Regularly check the water reservoir to ensure continuous operation in Auto mode.
Sleep Mode Functionality
The Sleep Mode on your Honeywell Humidipro is engineered to provide quiet and undisturbed operation during nighttime hours. When activated, this mode typically dims the display lights, minimizing visual distractions in a darkened room. Furthermore, Sleep Mode often adjusts the fan speed to its lowest setting, significantly reducing operational noise.
To engage Sleep Mode, locate the dedicated button on the control panel – often indicated by a moon or sleep symbol – and press it. The humidifier will then transition to the quieter, dimmed settings. Some models may also slightly reduce the humidity output to further minimize noise.
Sleep Mode is ideal for light sleepers or for use in bedrooms where a peaceful environment is desired. It allows you to enjoy the benefits of humidification without compromising your sleep quality. Remember to deactivate Sleep Mode when you want full control over the display and fan settings.
Timer Settings for Scheduled Operation
The Honeywell Humidipro’s timer function allows for convenient, scheduled operation, optimizing both comfort and energy efficiency. This feature enables you to pre-set the humidifier to turn on or off at specific times, tailoring its operation to your daily routine. Access the timer settings through the control panel, typically indicated by a clock icon.
You can usually set both a start time (when the humidifier turns on) and a stop time (when it shuts off). Some models offer multiple timer settings, allowing for different schedules on different days. Programming the timer can help maintain consistent humidity levels while you’re away or asleep, and can reduce energy consumption by preventing operation during unoccupied periods.
Consult your specific model’s instructions for detailed guidance on programming the timer. Properly utilizing this feature enhances the Humidipro’s convenience and contributes to a healthier indoor climate.

Maintenance and Troubleshooting
Regular cleaning and filter replacement are crucial for optimal performance. This section details how to address common issues like no water or strange noises, ensuring longevity.
Cleaning the Humidipro Unit
Maintaining a clean Humidipro is essential for preventing mold and bacteria growth, and ensuring efficient operation. Before any cleaning, always disconnect the unit from the power outlet. Begin by emptying the water reservoir completely. Then, remove the water tank and wash it with mild soap and water; rinse thoroughly to remove any soap residue.
Next, clean the humidifier base. Use a soft cloth dampened with a diluted vinegar solution (equal parts water and white vinegar) to wipe down all interior surfaces. This helps dissolve mineral buildup. Pay close attention to the transducer, the ultrasonic component that creates the mist – gently clean it with a cotton swab dipped in vinegar.
Avoid abrasive cleaners or scouring pads, as these can damage the unit. Rinse the base with clean water and dry thoroughly with a clean cloth. Finally, wipe down the exterior of the Humidipro with a damp cloth. Regular cleaning, ideally weekly, will keep your unit functioning optimally and extend its lifespan.
Replacing the Water Filter
Regular water filter replacement is crucial for maintaining air quality and humidifier performance. Honeywell recommends replacing the filter every 1-3 months, depending on water hardness and usage. Always disconnect the unit from power before beginning. Locate the filter access panel, typically on the base or back of the Humidipro.
Remove the old filter, noting its orientation for correct installation of the new one. Rinse the filter compartment with clean water to remove any debris. Insert the new Honeywell filter, ensuring it’s securely in place and properly aligned.
Using non-Honeywell filters may damage the unit and void the warranty. After replacing the filter, reset the filter replacement indicator on the control panel, if applicable. This ensures accurate tracking of filter life. Consistent filter changes contribute to cleaner, healthier mist and prolong the life of your Humidipro.
Common Issues and Solutions (No Water, Strange Noises)
If your Humidipro isn’t producing mist, first check the water reservoir level. Ensure it’s filled to the maximum line. Next, verify the filter is correctly installed and not clogged – a dirty filter restricts water flow. Strange noises, like gurgling or rattling, often indicate low water levels or mineral buildup.
To address mineral buildup, periodically descale the unit using a diluted white vinegar solution (refer to the ‘Cleaning’ section). If the fan is making noise, ensure nothing is obstructing its path. If issues persist, unplug the unit and inspect the water tank for cracks or leaks.
Avoid using essential oils or additives in the water, as these can damage the ultrasonic transducer. If problems continue after these steps, consult the troubleshooting section of this manual or contact Honeywell customer support for assistance.

Comparing Humidipro to Other Honeywell Humidifiers
The Humidipro utilizes ultrasonic technology, differing from cool mist and evaporative models. It offers quiet operation and efficient humidification, providing a distinct advantage over traditional Honeywell units.
Humidipro vs. Cool Mist Humidifiers

Cool mist humidifiers, a common alternative, disperse moisture using a fan to evaporate water. While effective, they can be noisier than the Humidipro’s ultrasonic operation.
Furthermore, cool mist models often require more frequent cleaning due to the potential for mineral buildup from evaporated water, and may distribute white dust.
The Humidipro, employing ultrasonic vibration, creates a fine, cool mist silently. This technology minimizes noise disruption, making it ideal for bedrooms or nurseries.
Ultrasonic humidifiers generally use less energy and can offer more precise humidity control. However, cool mist humidifiers are typically more affordable upfront.
Consider your priorities: if quiet operation and energy efficiency are paramount, the Humidipro is a strong choice.
If budget is a primary concern, a cool mist humidifier may be suitable, but be prepared for potentially higher noise levels and more frequent maintenance.
Humidipro vs. Evaporative Humidifiers
Evaporative humidifiers utilize a wick filter and a fan to draw water up and evaporate it into the air. They are self-regulating to some extent, as the evaporation rate slows down as humidity increases. However, they often require filter replacements and can be less energy-efficient than ultrasonic models.
The Honeywell Humidipro, utilizing ultrasonic technology, doesn’t rely on a wick or fan for evaporation. This results in quieter operation and potentially lower energy consumption. The Humidipro offers more precise humidity control, allowing you to set a specific humidity level.
Evaporative humidifiers can sometimes distribute minerals present in the water, potentially creating white dust. The Humidipro, when used with distilled water, minimizes this issue. Choosing between the two depends on your needs: evaporative models are often cheaper initially, while the Humidipro offers advanced features and quieter performance.
Benefits of Ultrasonic Humidification (Humidipro Technology)
Honeywell Humidipro leverages ultrasonic vibration to create a cool mist, offering several advantages over traditional humidification methods. This technology operates silently, making it ideal for bedrooms, nurseries, or any space where quiet operation is desired. Unlike evaporative humidifiers, it doesn’t use a fan, further reducing noise levels and energy consumption.
Ultrasonic humidification produces a fine mist that’s easily absorbed into the air, providing rapid humidity increases. The Humidipro’s precise control allows you to maintain a consistent and comfortable humidity level, beneficial for respiratory health and skin hydration.
Furthermore, ultrasonic humidifiers generally require less maintenance than evaporative models, as there are no wicks to replace. Using distilled water with your Humidipro minimizes mineral buildup and ensures the cleanest, healthiest mist possible, maximizing the benefits of this advanced technology.

Warranty Information and Support
Your Honeywell Humidipro is covered by a manufacturer’s warranty against defects in materials and workmanship.
Contact Honeywell customer support for assistance with warranty claims, replacement parts, or troubleshooting guidance.
Honeywell Humidipro Warranty Details
The Honeywell Humidipro warranty typically covers the unit for one year from the date of purchase against manufacturing defects. This warranty encompasses issues with the motor, electronic components, and the overall functionality of the humidifier when used under normal operating conditions.
However, the warranty does not cover damage resulting from misuse, improper maintenance (like using unfiltered water), accidental damage, or unauthorized repairs. Proof of purchase, such as a dated sales receipt, is required to make a warranty claim.
To initiate a claim, you’ll need to contact Honeywell Customer Support (details provided in the next section). They may request you to troubleshoot the issue with a representative or provide photos/videos demonstrating the defect. If a repair or replacement is approved, Honeywell will, at its discretion, either repair the unit or provide a comparable replacement model. Shipping costs for returning the defective unit may be the responsibility of the consumer.
Keep your original packaging and receipt for a smoother warranty process.
Contacting Honeywell Customer Support
For assistance with your Honeywell Humidipro, several support channels are available. The most direct method is to call Honeywell’s dedicated customer support line at 1-800-522-8056. Be prepared to have your model number and date of purchase readily available to expedite the process.
Alternatively, you can visit the official Honeywell Home website (honeywellhome.com) and navigate to the support section. Here, you’ll find a comprehensive FAQ database, troubleshooting guides, and downloadable manuals. A live chat option is often available for immediate assistance during business hours.

You can also reach out via email through the website’s contact form, though response times may be longer. When contacting support, clearly describe the issue you’re experiencing and any steps you’ve already taken to resolve it. Detailed information helps them diagnose the problem efficiently.
Social media channels may also offer limited support.
Finding Replacement Parts
Maintaining your Honeywell Humidipro requires occasional replacement of parts like filters and wicks. These components are crucial for optimal performance and air quality. Fortunately, sourcing replacements is straightforward.
The official Honeywell Home website (honeywellhome.com) offers a dedicated parts store where you can search for components specific to your Humidipro model. Simply enter your model number to view compatible parts. Major retailers like Amazon, Walmart, and Home Depot also carry a wide selection of Honeywell humidifier replacement parts, both online and in-store.
When purchasing, ensure the part number matches the one listed in your Humidipro manual. Using incorrect parts can damage the unit or void your warranty. Consider purchasing directly from Honeywell or authorized retailers to guarantee authenticity and quality. Keep your model number handy for easy identification during the purchase process.