Best Whole House Dehumidifiers of 2026
A whole house dehumidifier ties into your ductwork (or sits free-standing in a basement or crawlspace) and pulls moisture out of the air the system already moves, so you hold the whole house at a steady humidity instead of emptying a portable tank twice a day. Capacity is rated in pints of water removed per day, and the right size depends on your square footage and how damp the space really is. These are ducted or ducted-capable units meant to be tied into a forced-air system and a condensate drain by a pro, not the plug-in portables in our best dehumidifiers roundup. Every model here is a real unit you can buy today.
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Aprilaire 1850 Whole House Dehumidifier
Who it is for: Whole homes that need serious moisture removal across a large footprint.
- +Removes up to 95 pints per day, enough for most whole-house humidity problems
- +Covers homes up to roughly 5,200 sq ft, so it handles big open basements and full houses
- +Installs ducted into the HVAC system or free-standing in a basement, and drains by gravity or a small pump
Watch out: It is a large, heavier unit that needs duct space and a dedicated circuit, so the install is a real HVAC job, not a weekend swap.
Santa Fe Ultra98 Dehumidifier
Who it is for: Damp basements and crawlspaces where efficiency and a tough filter matter most.
- +Pulls up to 98 pints per day while drawing less power than most units its size
- +Ships with a MERV-13 filter, so it cleans the air it dries instead of just moving dust
- +Built by Therma-Stor for hard-use basement and crawlspace duty, and can be ducted or run stand-alone
Watch out: It is a premium-priced unit, so it only pays off in a genuinely damp space that runs the dehumidifier hard for months at a time.
Honeywell TrueDRY DR90 Whole House Dehumidifier
Who it is for: Mid-to-large homes wanting a proven ducted unit for less than the top picks.
- +Removes up to 90 pints per day, close to the big Aprilaire for less money
- +Designed to tie into supply or return ductwork and pair with a whole-home humidistat
- +Covers homes up to about 3,000 sq ft of conditioned space
Watch out: It is meant to run ducted into a forced-air system, so it is a weaker fit for a house with no ductwork or a stand-alone crawlspace.
Aprilaire 1820 Whole House Dehumidifier
Who it is for: Smaller homes, tighter builds, or single damp levels that do not need max output.
- +Removes up to 70 pints per day, plenty for a smaller footprint
- +Rated for homes up to about 2,800 sq ft, a clean step down from the 1850
- +Same ducted or free-standing install and gravity or pump drain as its bigger sibling
Watch out: Output is too low for a large or very damp house; step up to the 1850 or Santa Fe if you run over about 2,800 sq ft.
What actually matters when buying
What size whole house dehumidifier do I need?. Match the unit's pints-per-day rating to your square footage and how damp the space actually is. A ratings-day number is measured in warm, humid lab conditions, so a very wet basement pushes a unit harder than a mildly muggy main floor of the same size. As a rough guide, a 70-pint unit covers up to about 2,800 sq ft and a 95-pint unit up to roughly 5,200 sq ft, but a genuinely wet space or a home with a lot of air leakage needs the next size up. When in doubt, size up: a slightly oversized dehumidifier just cycles less, while an undersized one runs nonstop and never hits your target. Use the BTU calculator to gauge how your home's size and tightness drive the loads your HVAC system handles.
Should it be ducted into the HVAC or free-standing?. Both work, and several of these units do either one. A ducted install ties the dehumidifier into your supply or return ductwork so it treats the whole house through the existing registers, which is the cleanest fit for a home with central air. A free-standing install sets the unit in the basement or crawlspace and lets it condition that level directly, which is ideal when the moisture problem is concentrated below grade or the house has no usable ductwork. Ducted is tidier and treats the whole home evenly; free-standing is simpler and targets the wettest space.
Do I need a professional to install one?. Yes, treat this as a pro job. A whole house dehumidifier ties into ductwork, needs a condensate drain (gravity line or a small pump), and usually wants its own electrical circuit. Cutting into ducts, running a proper drain, and wiring it to a humidistat so it does not fight your air conditioner is well past filter-swap territory. A licensed HVAC tech sizes the unit, sets it up so it does not over-dry or short-cycle, and confirms the drain actually carries water away. See our whole-house dehumidifier installation guide for the full cost and process breakdown.
What efficiency should I look for?. Look at how many pints the unit removes per kilowatt-hour, sometimes printed as an energy factor or integrated energy factor. A whole house dehumidifier can run for months in a damp climate, so a more efficient unit like the Santa Fe Ultra98 saves real money over a cheaper one that pulls the same water for more watts. Also check the filter: a unit with a MERV-rated filter cleans the air as it dries it, while a bargain unit with a foam screen just keeps lint off the coil.
What maintenance does a whole house dehumidifier need?. Plan on cleaning or replacing the air filter a few times a year, more often in a dusty crawlspace, and checking the condensate drain for clogs each season so it does not back up and overflow. Wipe the coil if it scales, and keep the humidistat set so the house holds around 45 to 50 percent relative humidity in summer. Set it lower and the unit runs constantly for little gain; set it higher and you invite mustiness and dust mites.
How we picked
These picks are research-based, drawn from manufacturer specifications and owner feedback rather than our own bench testing. Confirm current model numbers, pint ratings, and coverage against the maker's site before you buy, since lineups change.
Useful next
Whole-House Dehumidifier Installation: Cost and Process, Best Dehumidifiers (portable and basement units), BTU Calculator: size your HVAC load.
Frequently asked questions
Is a whole house dehumidifier worth it?
In a genuinely damp home it usually is. If your basement smells musty, windows sweat, or the AC keeps the house cool but clammy, a whole house dehumidifier holds humidity steady everywhere and lets you run the air conditioner less. In a home that is only humid for a few weeks a year, a portable from our best dehumidifiers roundup is the cheaper call.
Can I add a whole house dehumidifier to my existing HVAC system?
Yes. Most whole house units, including the Aprilaire and Honeywell picks here, are made to tie into the supply or return ductwork of an existing forced-air system and share the ducts your furnace and AC already use. A tech adds a duct connection, a condensate drain, and a humidistat. If you have no ductwork, choose a unit that can run free-standing in the basement or crawlspace instead.
How much does it cost to install a whole house dehumidifier in a 2,000 sq ft house?
Budget roughly $1,500 to $2,800 installed for a typical 2,000 sq ft home, covering the unit and a standard ducted or free-standing install. The spread depends on the model's capacity, how much ductwork and drain line the tech has to run, and whether it needs a new electrical circuit. Our installation guide breaks down where the money goes.
What are the downsides of a whole house dehumidifier?
The big ones are up-front cost (far more than a portable), a pro install into your ductwork and drain, and the energy it uses running through a humid season. It also adds one more piece of equipment to maintain. For a home that is only briefly humid, those trade-offs do not pencil out; for a chronically damp house, they usually do.
What size dehumidifier do I need for a whole house?
Match pints-per-day capacity to your square footage and how wet the space is. A 70-pint unit suits smaller or drier homes up to about 2,800 sq ft, while a 90 to 98-pint unit covers large or very damp homes up to roughly 5,200 sq ft. A wet basement or a leaky house needs the next size up. Use the BTU calculator to see how your home's size and tightness affect the loads your system deals with.