Where to Purchase Whole Home Dehumidifiers

If your home has consistently high indoor humidity, a whole home dehumidifier can provide more comprehensive moisture control than portable units. Unlike room dehumidifiers, whole-home systems are designed to treat humidity throughout the house and can often be connected to existing HVAC ductwork.

But where should you purchase one? The answer depends on whether you need a professionally installed HVAC system, a standalone ducted unit, or a manufacturer/OEM solution.

Where Can You Buy a Whole Home Dehumidifier?

There are several common purchasing channels:

HVAC contractors and local dealers

Manufacturer-authorized dealers

Home improvement retailers

Specialized HVAC and indoor-air-quality suppliers

Online appliance and HVAC stores

Directly from a manufacturer or OEM supplier

For a permanently installed whole-home system, professional HVAC dealers are particularly important because sizing, duct connections, drainage, electrical requirements, and controls all affect performance. ENERGY STAR recommends consulting an HVAC professional for sizing and installation of whole-home dehumidifiers.

1. Purchase Through an HVAC Contractor

For homeowners installing a whole-home dehumidifier for the first time, an HVAC contractor is one of the most common purchasing options.

A contractor can typically help with:

Evaluating your home's moisture load

Selecting the appropriate PPD capacity

Inspecting existing ductwork

Connecting the dehumidifier to the HVAC system

Installing condensate drainage

Installing humidity controls

Setting the target relative humidity

Providing maintenance and service

Manufacturers such as Trane and American Standard direct homeowners toward local dealers for product selection and installation.

This option is particularly useful when you want a permanent whole-house humidity control system rather than a portable appliance.

2. Buy Directly From a Manufacturer

Some homeowners, contractors, distributors, and businesses prefer purchasing directly from a dehumidifier manufacturer.

This approach can be useful when you already know the required capacity and installation configuration.

For example, a manufacturer may offer several capacities such as:

70 PPD

95 PPD

100 PPD

120 PPD

135 PPD or higher

PREAIR offers whole home dehumidification solutions in different capacities, including 70 PPD, 95 PPD, and 135 PPD models, allowing buyers to select a capacity according to the home's moisture load.

For OEM and wholesale buyers, purchasing directly from a manufacturer can also provide access to OEM/ODM customization, technical support, product documentation, and bulk purchasing options.

3. Purchase From Home Improvement Stores

Large home improvement retailers also sell whole-house and high-capacity dehumidifiers.

For example, current retail listings include whole-home models from AprilAire in capacities such as 70, 100, and 130 PPD.

Buying through a major retailer can be convenient because you can compare specifications, pricing, availability, and customer reviews in one place.

However, purchasing the equipment is only one part of the project. A whole-home system may still require professional installation.

4. Buy From Specialized HVAC Suppliers

Specialized HVAC and indoor-air-quality suppliers are another option.

These suppliers often focus on products designed for:

Whole-home humidity control

Crawl spaces

Basements

Attics

HVAC integration

Indoor air quality

High-capacity residential applications

Compared with general appliance retailers, specialized HVAC suppliers may provide more detailed technical information, installation accessories, replacement filters, controls, and ducting components.

5. Online Stores

Online purchasing has become another option for whole-home dehumidifiers.

Online stores allow buyers to compare:

PPD capacity

Dimensions

Energy efficiency

Operating temperature

Drainage options

Warranty

Noise level

Ducting configuration

Smart controls

However, don't select a unit based solely on its advertised "pints per day" rating.

Different manufacturers and test conditions can produce significantly different PPD figures. ENERGY STAR notes that dehumidifier capacity depends on both the size of the space and the humidity conditions in that space.

What Should You Check Before Buying?

Before purchasing a whole-home dehumidifier, compare at least these specifications.

1. Moisture Removal Capacity

Capacity is normally expressed in pints per day (PPD).

For example:

Capacity	Approx. Water Removal
70 PPD	8.75 gal/day
95 PPD	11.9 gal/day
135 PPD	16.9 gal/day

These figures are mathematical conversions of the rated capacity; actual daily water removal depends on operating conditions.

2. Test Conditions

Always check the conditions under which the PPD rating was obtained.

A unit advertised as 135 PPD under one test condition may have a substantially different rated capacity under another standard.

This is particularly important when comparing products from different manufacturers.

3. Installation Configuration

Check whether the unit can be:

Ducted into an HVAC system

Installed as a standalone whole-home system

Connected to a dedicated return

Installed in a basement or crawl space

Connected to a continuous drain

Whole-home systems commonly require proper condensate drainage and may require dedicated electrical service.

4. Operating Temperature

If the unit will be installed in a basement, crawl space, or other cooler area, check its minimum operating temperature.

Some dehumidifiers are designed for warmer residential environments, while others are engineered to operate effectively at lower temperatures.

5. Energy Efficiency

Look for efficiency information such as Integrated Energy Factor (IEF) and ENERGY STAR certification where applicable.

ENERGY STAR explains that IEF measures liters of water removed per kilowatt-hour of energy consumed, making it useful when comparing the energy performance of qualifying models.

6. Drainage

Unlike portable dehumidifiers with buckets, whole-home systems generally use continuous drainage.

The condensate may be routed to:

A floor drain

Sump pit

Utility sink

Plumbing drain

Condensate pump

This eliminates the need to manually empty a water tank every day.

How Much Does a Whole Home Dehumidifier Cost?

The total cost includes more than the equipment itself.

Your overall investment may include:

Dehumidifier + ductwork + electrical work + drainage + controls + installation labor

Current manufacturer guidance indicates that whole-home dehumidifier projects can vary substantially in total cost depending on capacity, HVAC configuration, and installation complexity. Therefore, when comparing online prices, make sure you determine whether the listed price is for the equipment only or a complete installed system.

Should You Buy a 70, 95, or 135 PPD PREAIR Dehumidifier?

PREAIR's different whole-home capacities can serve different residential moisture-control requirements.

70 PPD WH70 Dehumidifier

Consider a 70 PPD whole home dehumidifier when the home has a moderate moisture load, and you need continuous humidity control without selecting a substantially larger system.

95 PPD WH95 Dehumidifier

A 95 PPD model provides additional moisture-removal capacity for larger homes or properties with higher humidity loads.

135 PPD WH135 Dehumidifier

A 135 PPD whole home dehumidifier is designed for applications with a significantly higher moisture load, such as large homes, humid climates, or properties with substantial basement or crawl-space moisture.

The correct choice should ultimately be based on moisture load, home size, climate, building tightness, HVAC configuration, and desired RH, rather than square footage alone.

What Is the Best Place to Purchase a Whole Home Dehumidifier?

There is no single purchasing channel that fits every buyer.

Homeowners who need a complete installed system may benefit from working with a qualified HVAC contractor.

Experienced HVAC professionals may prefer purchasing through an HVAC distributor or manufacturer.

Wholesale buyers, distributors, and brands may consider working directly with a manufacturer such as PREAIR for bulk purchasing and OEM/ODM requirements.

Before purchasing, compare the PPD rating, test conditions, efficiency, installation requirements, operating temperature, drainage, controls, warranty, and after-sales support.

Most importantly, make sure the dehumidifier is properly sized for the actual moisture load. A correctly sized system can provide more consistent humidity control than simply choosing the largest available unit.

Frequently Asked Questions

Can I buy a whole home dehumidifier online?

Yes. Whole-home dehumidifiers are available through online HVAC suppliers, home improvement retailers, and manufacturers. However, many systems require professional installation.

Can I install a whole home dehumidifier myself?

Some standalone systems may have relatively simple installation requirements, but duct connections, electrical work, condensate drainage, and HVAC integration may require a qualified professional.

What size whole-home dehumidifier do I need?

Capacity should be determined using the home's size, climate, moisture load, air infiltration, and existing HVAC configuration. PPD alone should not be used to select a unit.

Is a whole-home dehumidifier better than a portable dehumidifier?

They serve different purposes. A portable unit is generally designed for a specific room, while a whole-home system is designed to provide centralized humidity control throughout the areas served by the system.