Garages are hard on dehumidifiers. They swing from hot to cold, they are dusty, and many are not heated at all. A standard portable dehumidifier is tested at 65F, and ENERGY STAR suggests choosing a model specified for low temperatures if the space is usually cooler than that. Most garages are, for much of the year.
So the first question is temperature. If your garage is heated or attached and stays above about 60F, a regular 50 pint unit works. If it gets cold, you need a low-temperature compressor unit or a desiccant model.
Garage dehumidifiers compared
| Pick | Capacity | Coverage | Pump | Noise | ENERGY STAR | Price tier | |
|---|---|---|---|---|---|---|---|
| Best for cold garages AlorAir HDi65S | 55 pints/day (AHAM 80F) | Up to 1,300 sq ft (maker claim) | Yes | Max 52 dB (Sylvane listing) | Not stated | $$$$$ | Check price |
| Best value low-temp AlorAir HD55S | 55 pints/day (AHAM 80F) | Up to 1,300 sq ft (maker claim) | No | Not published for this SKU | Yes | $$$$ | Check price |
| Best wall mounted Innovative IW25-6 On-Wall | 40 pints/day (AHAM 80F) | Up to 1,500 sq ft (maker) | No | Not published | Not stated | $$$$$ | Check price |
| Best for heated garages Honeywell TPFIT50PWK (pump) | 50 pints/day (DOE) | Up to 4,000 sq ft (retailer listing) | Yes | Not published | Yes | $$$ | Check price |
| Best shop dehumidifier AlorAir HDi90 | 90 pints/day (AHAM 80F) | Up to 2,600 sq ft (maker claim) | Yes | Max 58 dB (Sylvane listing) | Not stated | $$$$$ | Check price |
| Best for sheds Eva-Dry E-500 | See notes | Spaces up to 500 cubic feet | No | Silent (no fan or compressor) | No | $ | Check price |
| Best moisture absorber for garage DampRid refillable | See notes | Not stated | No | Silent | No | $ | Check price |
Best dehumidifier for garage
AlorAir Sentinel HDi65S Crawl Space Dehumidifier with Pump
For a cold or unheated garage, the AlorAir HDi65S is our pick. AlorAir rates it to run from 33.8F to 104F, it removes 55 pints a day under AHAM conditions, it has a pump so you can drain it out of the garage, and its compact metal body handles a workshop better than a plastic portable.
| Model number | HDi65S |
|---|---|
| Type | Compressor (crawl space / basement, low temp) |
| Capacity (AHAM test, 80F, 60% RH) | 55 pints/day |
| Coverage | Up to 1,300 sq ft (maker claim) |
| Built-in pump | Yes |
| Wi-Fi / app | Yes |
| ENERGY STAR | Not stated |
| Noise | Max 52 dB (Sylvane listing) |
| Low-temperature operation | 33.8F to 104F operating range (maker) |
| Capacity at saturation (90F, 90% RH) | 120 pints/day |
| Airflow | 130 CFM |
| Size / weight | 19.2 x 12.2 x 13.3 in, 44 lb |
| Warranty | 6-year limited (Amazon listing) |
| Price tier | Pro (about $900 and up) |
Pros
- Rated down to 33.8F
- Pump
- Wi-Fi
Cons
- Pro price tier
Spec sources (checked 2026-11-11): AlorAir product page HDi65S; AlorAir HDi65S spec sheet; Sylvane listing (noise, low temp).
Best value cold-weather garage dehumidifier
AlorAir Sentinel HD55S Crawl Space Dehumidifier (drain hose)
The HD55S shares the low-temperature design but drains by gravity hose, and it is ENERGY STAR certified at 2.08 L/kWh. If there is a floor drain or you can run a hose out under the door, it is the better value.
| Model number | HD55S |
|---|---|
| Type | Compressor (crawl space / basement, low temp) |
| Capacity (AHAM test, 80F, 60% RH) | 55 pints/day |
| Coverage | Up to 1,300 sq ft (maker claim) |
| Built-in pump | No |
| Wi-Fi / app | No |
| ENERGY STAR | Yes |
| Noise | Not published for this SKU |
| Low-temperature operation | Compressor rated down to 33.8F (retailer listing) |
| Capacity at saturation | Up to 120 pints/day |
| Note on the name | The original Sentinel HD55 is listed at 53 pints AHAM and 1,200 sq ft; HD55S and pump version HD55P are newer variants |
| Warranty | 6-year limited (Amazon listing) |
| ENERGY STAR test data | 36.33 pints/day, IEF 2.08 L/kWh, about 379 kWh/yr (record for Sentinel HD55S) |
| Price tier | Premium (about $400 to $900) |
Pros
- Low-temp rating
- ENERGY STAR, IEF 2.08
Cons
- No pump
Spec sources (checked 2026-11-11): Sylvane listing Sentinel 55 pint drain hose; AlorAir HD55 spec sheet; Sylvane listing original HD55 (53 pints, 1,200 sq ft); ENERGY STAR certified product record (Sentinel HD55S).
Best wall mounted garage dehumidifier
Innovative Dehumidifiers IW25-6 On-Wall Dehumidifier
A garage dehumidifier wall mounted off the floor stays out of the way of cars, tools and spills. Innovative Dehumidifiers' IW25-6 on-wall unit is rated at 40 pints a day at 80F (24 at 65F), covers up to 1,500 sq ft and has a rated operating range of 46F to 95F. That minimum makes it suited to attached or partly heated garages rather than freezing ones. It is usually sold through HVAC suppliers. See our wall mounted dehumidifier guide for more.
Heads up: Often sold through HVAC suppliers rather than Amazon; the Amazon link searches for it.
| Model number | IW25-6 (on-wall) |
|---|---|
| Type | Wall-mounted compressor |
| Capacity (AHAM test, 80F, 60% RH) | 40 pints/day |
| Coverage | Up to 1,500 sq ft (maker) |
| Built-in pump | No |
| Wi-Fi / app | Not stated |
| ENERGY STAR | Not stated |
| Noise | Not published |
| Low-temperature operation | 46F to 95F operating range (retailer spec table) |
| Capacity at 65F, 60% RH | 24 pints/day |
| Install | Hangs on a wall and drains through a hose; an in-wall version also exists |
| Price tier | Pro (about $900 and up) |
Pros
- Off the floor
- Built for permanent install
Cons
- 46F minimum
- Pro price tier
- Install work needed
Spec sources (checked 2026-11-11): SupplyHouse listing IW25-6 on-wall; Innovative IW25-6 specification sheet (June 2026); Sylvane: Innovative On-Wall dehumidifier.
Best for heated garages and gyms
Honeywell TP-Fit 50 Pint ENERGY STAR Dehumidifier with Pump
If your garage is heated (a home gym, workshop or finished garage), a regular 50 pint pump unit is enough. The Honeywell TPFIT50PWK pumps about 15 feet and is ENERGY STAR certified.
| Model number | TPFIT50PWK |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 50 pints/day |
| Coverage | Up to 4,000 sq ft (retailer listing) |
| Built-in pump | Yes |
| Wi-Fi / app | Not stated |
| ENERGY STAR | Yes |
| Noise | Not published |
| Pump reach | Drains vertically or horizontally up to 15 ft (Sylvane) |
| Size / weight | 24.1 x 15.35 x 10.55 in, 40.48 lb (Staples) |
| Fan speeds | 2 |
| ENERGY STAR test data | 49.66 pints/day, IEF 2.01 L/kWh, about 516 kWh/yr (record for TPFIT50PWK) |
| Price tier | Mid (about $200 to $400) |
Pros
- Much cheaper than low-temp units
- Pump
Cons
- Not for cold garages
Spec sources (checked 2026-11-11): Honeywell Air Comfort TPFIT50PWK; Staples listing TPFIT50PWK; Sylvane: Honeywell TP-Fit series (pump reach); ENERGY STAR certified product record (TPFIT50PWK).
Best shop dehumidifier
AlorAir Sentinel HDi90 Basement and Crawl Space Dehumidifier with Pump
For a large workshop or a two to three car garage, the HDi90 is rated at 90 pints a day (AHAM), 2,600 sq ft and down to 33.8F, with a pump.
| Model number | HDi90 |
|---|---|
| Type | Compressor (crawl space / basement, low temp) |
| Capacity (AHAM test, 80F, 60% RH) | 90 pints/day |
| Coverage | Up to 2,600 sq ft (maker claim) |
| Built-in pump | Yes |
| Wi-Fi / app | Not stated |
| ENERGY STAR | Not stated |
| Noise | Max 58 dB (Sylvane listing) |
| Low-temperature operation | Down to 33.8F (retailer listing) |
| Capacity at saturation (90F, 90% RH) | 198 pints/day |
| Airflow | 210 CFM |
| Warranty | 6-year limited (Amazon listing) |
| Price tier | Pro (about $900 and up) |
Pros
- High capacity
- Low-temp rating
Cons
- Max 58 dB
- Pro price tier
Spec sources (checked 2026-11-11): Sylvane listing HDi90; AlorAir product spec PDF.
Best dehumidifier for outdoor shed
Eva-Dry E-500 High Capacity Renewable Dehumidifier
Most sheds have no power. For a dehumidifier for outdoor shed use, a cordless renewable unit like the Eva-Dry E-500 protects a toolbox or a cabinet of supplies (up to 500 cubic feet). Bring it inside to recharge.
| Model number | E-500 |
|---|---|
| Type | Renewable desiccant (cordless) |
| Coverage | Spaces up to 500 cubic feet |
| Built-in pump | No |
| Wi-Fi / app | No |
| ENERGY STAR | No |
| Noise | Silent (no fan or compressor) |
| Bucket / capacity | Absorbs about 6 to 8 oz before renewing (retailer listing) |
| Time between renewals | About 30 to 60 days, depending on humidity (retailer listing) |
| Size | About 8 x 2.25 x 5.25 in |
| Price tier | Budget (under about $100) |
Pros
- No power needed in the shed
- Reusable
Cons
- Small spaces only
Spec sources (checked 2026-11-11): Zoro listing E-500 (500 cu ft); SupplyHog listing (30 to 60 days); BuyDig listing (6 to 8 oz).
Best moisture absorber for garage
DampRid Refillable Moisture Absorber
DampRid's refillable cups are the cheapest way to protect cabinets and corners in a garage, attic or shed, lasting up to 45 days per fill. Keep them where pets and children cannot reach the brine.
| Model number | Refillable cup + 44 oz refill |
|---|---|
| Type | Disposable / refillable moisture absorber (no power) |
| Coverage | Not stated by maker |
| Built-in pump | No |
| Wi-Fi / app | No |
| ENERGY STAR | No |
| Noise | Silent |
| Bucket / capacity | 10.5 oz cup; refills sold in 42 to 44 oz bags |
| How long it lasts | Up to 45 days per fill, depending on temperature and humidity (retailer listing) |
| How it works | Calcium chloride crystals pull water from the air and turn into liquid brine you pour away |
| Price tier | Budget (under about $100) |
Pros
- No power
- Cheap
Cons
- Slow; will not dry a whole garage
Spec sources (checked 2026-11-11): Lowe's listing (cup size, up to 45 days); Walmart listing 44 oz refill.
Low-temp operating range table
| Model | Rated operating range | Source |
|---|---|---|
| AlorAir HDi65S | 33.8F to 104F | AlorAir |
| AlorAir HDi90 / HD55S | Down to 33.8F | Retailer listings |
| Innovative IW25-6 on-wall | 46F to 95F | Retailer spec table |
| Santa Fe Compact70 | 49F to 95F | Santa Fe data sheet |
| Standard portables | Tested at 65F; choose a low-temp model below that | ENERGY STAR |
Attic dehumidifier
An attic dehumidifier is rarely the right fix. Attics are usually damp because warm, humid air leaks up from the house or because ventilation or a bathroom fan duct is faulty. Fix those first. If you store things in a finished attic room, the best dehumidifier for attic storage is a small unit with a humidistat, or absorbers for boxes and closets. Unfinished attics get very hot and very cold, which is outside most dehumidifiers' ratings.
Solar powered options
We could not find a solar powered dehumidifier from a mainstream brand with published capacity data. Some sellers market small thermoelectric units with solar panels, but they remove very little water. For an off-grid shed or cabin, renewable desiccant units (recharged at home) and absorbers are the practical choices.
Frequently asked questions
Do you need a dehumidifier in a garage?
Will a dehumidifier work in a cold garage?
Can you put a dehumidifier in an attic?
Sources
- ENERGY STAR: Dehumidifiers buying guidance and sizing chart
- ENERGY STAR Certified Dehumidifiers dataset (data.energystar.gov)