Whole House Dehumidifier Cost: Unit, Install & Running Costs

A whole home dehumidifier cost has three parts. The unit itself is a pro-tier purchase. Installation can be cheap (a free-standing unit draining to a floor drain) or expensive (a fully ducted system tied into your HVAC). And because it may run for months, the yearly electricity cost matters too. We do not quote exact unit prices, because they change constantly; instead we use price tiers and published installation estimates.

The two installation estimates differ because they define the job differently: one covers installation as its own line, the other covers a complete moderate job. Get two or three local quotes and ask each contractor to itemize the unit, ductwork, drain, controls and electrical work.

Whole home dehumidifier cost by brand

Price tiers: Pro means about $900 and up for the unit. Check the current price on Amazon for models sold there.

Crawl space dehumidifier cost

Crawl space dehumidifier cost depends on whether the crawl space is already sealed. The dehumidifier itself is a pro-tier unit such as the Santa Fe Compact70, Aprilaire E070 or AlorAir Sentinel HDi65S, and many homeowners install one themselves if the crawl space is already encapsulated: set it on blocks, run the drain hose, plug it in. The expensive part is encapsulation (vapor barrier, sealing vents, sometimes insulation), which is a separate project. A dehumidifier for crawl space cost without encapsulation is mostly wasted, because the space keeps pulling in outdoor air.

HVAC dehumidifier cost

An HVAC dehumidifier (a ducted whole-home unit) costs the most to install because the contractor connects it to your return and supply ducts, adds a condensate drain and often a dedicated wall control. That is the job the Homewyse estimate describes: $2,774 to $3,285 per unit as a national average in May 2026, with 13% to 22% more if a general contractor supervises. A simpler bypass installation in an unfinished basement costs less.

Installation cost

Running cost per year

ENERGY STAR publishes an estimated yearly energy use for every certified dehumidifier. Multiplying by an average U.S. residential electricity price of $0.182 per kWh (our assumption, based on EIA's outlook) gives these yearly running costs:

Your real cost depends on how many hours it runs, your local rate and how damp the house is. For the full method, see our dehumidifier running costs guide.

Portable vs ducted cost

Sanidry Sedona cost

SaniDry is the dehumidifier brand of Basement Systems, a network of basement waterproofing dealers. SaniDry Sedona cost and Sedona price are not published: Basement Systems asks you to request a free estimate from a local dealer, and the unit is sold installed. Basement Systems says the Sedona removes up to 100 pints a day. Third-party price estimates we found online disagree with each other too much to repeat. If you get a quote, compare it with buying a similar capacity unit such as the Santa Fe Classic or Aprilaire E100 and installing it yourself. See our Sanidry review.

What affects the price

Two homes can get very different quotes for the same dehumidifier. The main drivers are:

• Ducted or free-standing. A unit that sits on the basement floor and drains to a floor drain needs no ductwork. A ducted install adds supply and return connections, dampers and labor.
• Distance to the air handler and drain. Longer duct runs and a condensate pump add cost.
• Electrical work. Most whole-home units run on a standard 115 V circuit, but an installer may recommend a dedicated circuit near the unit.
• Controls. A wall-mounted dehumidistat or a Wi-Fi model costs more than the unit's built-in control.
• Access. Tight crawl spaces and finished basements take longer.
• Local labor rates and permits. Homewyse notes that general contractor supervision adds 13% to 22%.

Questions to ask an installer

• What capacity are you recommending, and how did you size it (square footage, climate, how tight the house is)?
• Will it be ducted? If so, where do the supply and return connect, and what is the static pressure on that run?
• Where will the condensate drain go, and do I need a pump?
• Is the unit ENERGY STAR certified? (Ask for the model number and look it up.)
• What is covered by the unit warranty, and what is covered by your labor warranty?
• Can you itemize the quote: unit, ductwork, drain, controls, electrical?

Cheaper alternatives

Before paying for a ducted system, try the cheaper fixes in this order:

• Fix water first: gutters, downspouts, grading, and any leaks. EPA's moisture-control advice starts with fixing leaks and keeping water out.
• Run bathroom and kitchen exhaust fans.
• Put a 50 pint portable with a pump in the basement. The 50 pint guide compares them.
• If one portable cannot hold 50% humidity, move up to a heavy duty basement unit before going fully ducted.