Preair is a dehumidifier manufacturer with over 20-year experience on the design, mould, tooling, R&D, production, quality checking, after-sales service, having strong capacity to provide OEM & ODM solutions for you.

OEM dehumidifier products are manufactured according to your specifications and branding, while ODM dehumidifier products are based on the manufacturer's existing designs with customizable branding and minor feature adjustments. Preair provides both OEM and ODM services. Contact us.

Yes. Preair can customize housing color, logo, packaging, voltage, controls, airflow, drainage configuration, and other features, depending on the project scope.

Preair provides dehumidification product selection assistance, engineering consultation, installation guidance, spare parts, and after-sales support as part of our OEM/ODM services.

Preair strictly follows the standard of below procedure to ensure the quality.

IQC -- Incoming Quality Control

PQC -- Production QC

OQA -- Out Quality Assurance

DQA -- Development Quality Assurance

IPQC -- In Process Quality Control

Laboratory -- Product Laboratory

The lead time depends on the required machine model. the lead time of some finished products takes 1 week, some customized products more than 30 days, large orders 35 days.

One year from the shipping date.

For customers who cooperate with us for the first time, Preair will charge sample fees and freight. The samples will be delivered within 3-5 working days after delivery test. If you are satisfied with the quality of the sample and place a batch order, we will refund the sample fee.

Preair accepts small trial orders to support your business. However, please note that in our peak season, conditions can be arranged depending on your required machine model.

Preair accepts 30% T/T in advance, balance against the copy of B/L Or L/C at sight.

DHL, UPS, FedEx, TNT, Airline, Train,and sea shipping also optional. You can also send your shipping agent to pick up the goods.

Private label is acceptable.

Most of our products come with free white boxes. We can make color boxes, but the cost of printing will be included in the unit price.

Yes, dehumidifiers can lose efficiency over time due to several factors:

-- Dust and Dirt Buildup

-- Refrigerant Leakage

-- Wear and Tear

-- Clogged Filters

-- Humidity Levels (used in extremely high humidity conditions for extended periods)

-- Age

-- Lack of Maintenance

Environmental Conditions (in extreme temperatures or conditions outside of its recommended range)

Yes, it is normal for dehumidifiers to make some level of noise during operation. This noise is primarily generated by the fan and the compressor components of the dehumidifier.

While some noise is to be expected, excessively loud or unusual noises can indicate a problem with the dehumidifier and may require attention or maintenance. If you notice any sudden changes in the noise level, it's a good idea to check the unit for any loose components, debris, or signs of wear and tear. 

When selecting a dehumidifier, it's important to consider several features to ensure it meets your specific needs. Here are some key features to look for:

Capacity

Humidistat

Auto-Defrost

Continuous Drainage Option

Portability and Wheels

Filter Indicator Light

Noise Level

Energy Efficiency

Timer and Delay Start

Auto-Restart

Built-In Pump

Digital Display and Controls

Air Filtration

Warranty

A humidistat in a dehumidifier is a sensor that measures the relative humidity (RH) level in the air. It works in conjunction with the dehumidifier's control system to maintain a desired humidity level set by the user. Here's how it works:

-- Sensing Humidity Levels

-- User-Set Humidity Level

-- Comparison and Control

-- Cycling On and Off

-- Maintaining Constant Humidity

The power consumption of a dehumidifier can vary widely depending on its capacity, features, and the manufacturer's design. Generally, residential dehumidifiers can range from about 300 watts for smaller units to 1,000 watts or more for larger, higher-capacity models.

Yes, if the unit is designed for continuous operation and has proper drainage. Many commercial and whole-house dehumidifiers are built to run 24/7.