The fastest place to buy a dehumidifier depends on whether you need it today or can wait for shipping
Big-box retailers like Home Depot, Lowe's, and Walmart stock dehumidifiers in-store and online with same-day or next-day pickup at most locations. Amazon and other online retailers ship within two to five business days, often with free shipping on orders over a certain amount. Specialty HVAC suppliers and appliance stores carry models that big-box stores do not stock, but you may need to order ahead. Secondhand dehumidifiers from Facebook Marketplace, Craigslist, and local thrift stores cost 30 to 50 percent less than new ones, though you cannot test them before purchase and have no manufacturer warranty.
The choice depends on three things: how soon you need the unit, whether you want to inspect it in person, and your budget. If you need it within hours, a local big-box store is your only option. If you can wait a few days and want the lowest price, online retailers and secondhand sources are better. If you want a specific capacity or feature set that mass-market stores do not carry, a specialty supplier is worth the phone call.
Key Takeaways
- Home Depot, Lowe's, and Walmart have dehumidifiers in stock at most locations and offer same-day or next-day pickup online.
- Amazon and other online retailers ship dehumidifiers in two to five business days and often have a wider range of models and capacities than physical stores.
- Specialty HVAC and appliance retailers carry commercial-grade and high-capacity models that big-box stores do not, but typically require advance orders.
- Secondhand dehumidifiers from Facebook Marketplace, Craigslist, and thrift stores cost significantly less but come without warranty or the ability to test before buying.
Big-box retailers: same-day pickup and standard models
Home Depot, Lowe's, and Walmart carry dehumidifiers year-round, with inventory heaviest in spring and summer when humidity problems peak. Most locations stock three to eight models in the 30-pint to 70-pint range — the sizes that handle typical bedroom and basement moisture. You can check stock online before you go, reserve a unit for in-store pickup, or buy online and pick up the same day at many locations.
Prices at these retailers are usually middle-of-the-road: not the cheapest online, but cheaper than specialty stores. Return policies are straightforward — typically 30 to 90 days with a receipt. The downside is selection: big-box stores stock only the most popular models, so if you need a 100-pint unit or a specific brand, you may not find it. Staff knowledge varies widely; you may get a helpful answer or a blank stare depending on the store and the day.
Online retailers: wider selection and lower prices
Amazon, Wayfair, and other online appliance retailers stock 50 to 200 dehumidifier models, including sizes and brands that physical stores do not carry. Prices are often 10 to 20 percent lower than big-box stores because online retailers have lower overhead. Shipping is usually free on orders over $35 to $50, and delivery takes two to five business days for standard shipping, one to two days for expedited options.
The trade-off is that you cannot see or touch the unit before it arrives. Read the product photos and customer reviews carefully — look for comments about noise level, water collection reliability, and whether the unit arrived damaged. Check the return policy: Amazon allows returns within 30 days, but some third-party sellers have stricter windows. If the unit arrives broken or does not work, you will need to arrange a return shipment, which can take another week.
Specialty HVAC and appliance suppliers: commercial and high-capacity models
Local HVAC contractors, appliance repair shops, and dedicated dehumidifier suppliers carry models designed for commercial use, basements larger than 2,000 square feet, and specific humidity-control needs. These shops stock 100-pint, 150-pint, and larger units that big-box retailers do not. They also carry brands like Aprilaire, Santa Fe, and Desiccant that focus on whole-home or industrial dehumidification.
Prices are higher than mass-market retailers, but these suppliers often offer installation, warranty extensions, and information on sizing for your space. Many require you to call or visit in person; they do not maintain large online inventories. If you have a basement moisture problem that a standard 50-pint dehumidifier will not solve, or if you want a unit that integrates with your HVAC system, this is the right place to start. Ask about floor models or returns that are discounted.
Secondhand sources: lower cost, higher risk
Facebook Marketplace, Craigslist, OfferUp, and local thrift stores like Goodwill and Salvation Army sell used dehumidifiers for $50 to $150, compared to $200 to $400 for new ones. If you find a unit that works, the savings are real. The risk is that dehumidifiers are mechanical devices with compressors and fans that wear out; a used unit may fail within months, and you have no recourse.
If you buy secondhand, ask the seller how long they owned it, why they are selling, and whether it still runs. Ask them to plug it in and run it while you watch. Look for rust on the coils, cracks in the plastic housing, and water leaks around the base — all signs of age or damage. Do not buy a unit that does not run or that the seller has not tested. Bring cash and inspect it in person; do not buy sight-unseen from an online listing.
Comparing price and timing across sources
| Source | Typical Price Range | Delivery Time | Selection | Warranty |
|---|---|---|---|---|
| Home Depot / Lowe's / Walmart | $200–$400 | Same day to next day (pickup) | 3–8 models | Manufacturer + store return policy |
| Amazon / Wayfair | $180–$380 | 2–5 business days | 50–200 models | Manufacturer + 30-day return |
| HVAC / appliance suppliers | $250–$600+ | 3–7 days (often special order) | 20–50 models | Manufacturer + extended options |
| Secondhand (Marketplace / Craigslist) | $50–$150 | Same day (local pickup) | Varies widely | None |
What to check before you buy, no matter where you shop
Verify the pint capacity matches your room size. A 30-pint dehumidifier is designed for rooms up to 500 square feet; a 50-pint for up to 1,000 square feet; a 70-pint for up to 1,500 square feet. If you buy too small a unit, it will run constantly and not keep up. Check the noise level in decibels — anything under 50 dB is quiet, 50 to 60 dB is moderate, and above 60 dB is loud. Read customer reviews for complaints about water leaks, compressor failure, and whether the unit shuts off automatically when the tank is full.
Look at the warranty length. Most manufacturers offer one to three years on parts and labor. Some retailers like Best Buy offer extended warranties for an extra $30 to $80 that cover accidental damage. If you are buying secondhand, there is no warranty, so factor in the risk that the unit may fail and you will need to replace it sooner than expected.
Frequently Asked Questions
Can I rent a dehumidifier instead of buying one?
Yes. Home Depot, Sunbelt Rentals, and some local equipment rental shops rent dehumidifiers for $15 to $40 per day or $40 to $100 per week. Renting makes sense if you need one for a short-term water damage cleanup or a single humid season. If you need it year-round or for more than a few months, buying is cheaper.
What is the difference between a portable and a whole-home dehumidifier?
Portable dehumidifiers are standalone units you move from room to room; they cost $200 to $400 and handle one or two rooms. Whole-home dehumidifiers are installed into your HVAC system and cost $1,000 to $2,500 plus installation. Whole-home units are worth it if humidity is a problem in most rooms, not just one basement or bedroom. Big-box stores sell only portable units; specialty HVAC suppliers carry both.
Do I need to buy a new dehumidifier every year?
No. A well-maintained dehumidifier lasts five to ten years. Clean the filter monthly, empty the water tank or may support the drain hose is clear, and store it in a dry place during off-season. If it stops removing moisture or leaks water, it may need repair or replacement, but regular use does not wear it out quickly.
Which brand is most reliable?
Frigidaire, LG, and Danby are the most common brands at big-box retailers and have decent reliability ratings. Aprilaire and Santa Fe are more expensive but built for commercial or whole-home use and last longer. Read customer reviews on the specific model you are considering, not just the brand — a cheap Frigidaire may fail sooner than a mid-range LG.
Can I return a dehumidifier if it does not work?
Yes, within the store's return window. Home Depot and Lowe's allow returns within 90 days with a receipt. Amazon allows 30 days. If you buy from a third-party seller on Amazon or another marketplace, check their return policy before you buy — some allow only seven to 14 days. Keep the receipt and the original packaging in case you need to return it.