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If you want a BISSELL Little Green ProHeat portable carpet cleaner for pet messes, the biggest buying decision is whether you need true active water heating or the lower-cost HeatWave temperature-maintenance design. The Little Green ProHeat Pet is the strongest pet-focused choice, the Little Green ProHeat SmartMix 3935 adds automatic formula mixing and a water-only rinse mode, and the classic Little Green ProHeat 2513G offers simpler spot cleaning with a larger 37 oz. clean tank. All three are corded portable extractors built for carpet, upholstery, stairs, pet beds, car interiors, and other water-safe soft surfaces.
Quick Verdict
- Best for Pet Messes: BISSELL Little Green ProHeat Pet — Combines active 120°F heating with a dedicated Pet Hair Removal Tool and self-cleaning stain nozzle.
- Best Premium Features: BISSELL Little Green ProHeat SmartMix 3935 — Pairs active 120°F heating with automatic formula dosing and a water-only Rinse Mode.
- Best Value: BISSELL Little Green ProHeat 2513G — Uses HeatWave technology to maintain warm tap water and offers a larger 37 oz. tank plus a 3-in-1 Stair Tool.
Quick Comparison
| Model | Best For | Heating System | Clean / Dirty Tank | Included Tools | Weight | Amazon |
|---|---|---|---|---|---|---|
| ProHeat Pet | Pet stains, odors, and embedded hair | Actively heats solution to 120°F | 32 oz. / 27 oz. | Self-Cleaning Tough Stain Tool, Pet Hair Removal Tool | 9.7 lb. | Check Price on Amazon |
| ProHeat SmartMix 3935 | Automatic mixing and water-only rinsing | Actively heats solution to 120°F | 32 oz. / 27 oz. | Self-Cleaning Tough Stain Tool, Spraying Crevice Tool | 9.7 lb. | Check Price on Amazon |
| ProHeat 2513G | Lower-cost everyday spot and stair cleaning | HeatWave maintains warm tap water; does not heat cold water | 37 oz. / 31.5 oz. | 3″ Tough Stain Tool, 3-in-1 Stair Tool, HydroRinse Hose Tool | 9.2 lb. | Check Price on Amazon |
1. BISSELL Little Green ProHeat Pet Portable Deep Cleaner
Best for Pet Messes: The Little Green ProHeat Pet is the most directly matched option for homes dealing with pet accidents, muddy paw prints, set-in spots, lingering odors, and shedding on water-safe carpet or upholstery. Its integrated heater warms the water-and-formula mixture to 120°F in under 30 seconds, while the compact body is far easier to carry up stairs or out to a garage than a full-size upright carpet cleaner.
BISSELL’s current U.S. ProHeat Pet reference model features a 32 oz. clean tank, a 27 oz. dirty tank, a 15 ft. power cord, and a 4.8 ft. hose. It includes a Self-Cleaning Tough Stain Tool and a Pet Hair Removal Tool designed to agitate and lift stubborn fur out of fabric fibers while you clean. Because the machine is corded rather than battery-powered, it delivers consistent suction and heating power near an outlet without runtime drop-off.
Key Specifications:
- Heating Technology: Integrated active ProHeat system (heats solution up to 120°F in under 30 seconds)
- Tank Capacity: 32 oz. clean tank / 27 oz. dirty collection tank
- Cord & Hose Length: 15 ft. power cord / 4.8 ft. flexible hose
- Weight: 9.7 lb. (empty)
- Included Attachments: Self-Cleaning Tough Stain Tool, Pet Hair Removal Tool
Why You’ll Like It: It pairs true active heated extraction with an attachment kit built around everyday pet-owner headaches. The integrated self-cleaning mechanism on the stain tool also lets you flush dirty residue out of the nozzle and hose before putting the unit away.
Who Should Buy This: Pet owners who want active 120°F heating and a dedicated pet-hair attachment for carpet spots, stairs, pet beds, sofas, and vehicle upholstery.
Who Should Avoid This: Buyers who need a battery-powered cordless cleaner, a high-capacity machine for wall-to-wall rooms, or a cleaner for sealed hard floors.
Pros:
- Integrated ProHeat system actively heats cleaning solution to 120°F.
- Pet Hair Removal Tool helps loosen and gather embedded fur from carpet and upholstery.
- Self-Cleaning Tough Stain Tool makes after-use hose and nozzle flushing simple.
- Compact 9.7 lb. footprint is easy to carry and store in a closet.
Cons:
- 32 oz. clean tank and 27 oz. dirty tank are sized for spot jobs rather than whole rooms.
- Corded design requires access to a standard wall outlet.
- Costs more than the classic non-actively-heated 2513G model.
Bottom Line: If pet hair, urine spots, and vomit are the main reasons you are buying a portable extractor, the ProHeat Pet gives you the best combination of true water heating and pet-specific attachments.
2. BISSELL Little Green ProHeat SmartMix Portable Deep Cleaner 3935
Best Premium Features: The Little Green ProHeat SmartMix 3935 is built for buyers who want true heated cleaning without manually measuring and pouring formula to tiny fill lines on every refill. Its integrated heater brings the cleaning mixture to 120°F in under 30 seconds, while SmartMix Technology automatically blends water and concentrated BISSELL portable formula at the proper ratio.
This model shares the 32 oz. clean tank, 27 oz. dirty tank, 15 ft. power cord, and 9.7 lb. empty weight of the active-heat platform. Its standout convenience feature is a dedicated water-only Rinse Mode, which lets you flush soap residue out of carpet or upholstery fibers with a flip of a switch—no need to dump and refill the clean water tank mid-job. It also includes a Self-Cleaning Tough Stain Tool and a Spraying Crevice Tool for reaching along seat cushions, baseboards, and tight car consoles.
Key Specifications:
- Heating Technology: Integrated active ProHeat system (heats solution up to 120°F in under 30 seconds)
- Formula System: SmartMix automatic mixing with switchable water-only Rinse Mode
- Tank Capacity: 32 oz. clean tank / 27 oz. dirty collection tank
- Power Cord: 15 ft. corded operation
- Weight: 9.7 lb. (empty)
- Included Attachments: Self-Cleaning Tough Stain Tool, Spraying Crevice Tool
Why You’ll Like It: SmartMix prevents over-applying cleaning solution—one of the biggest causes of sticky carpet residue that attracts fresh dirt—while Rinse Mode makes a final clean-water pass effortless. This setup is especially helpful for upholstery, mattresses, and car interiors where leftover detergent is noticeable.
Who Should Buy This: Buyers who prioritize automatic formula dosing, active 120°F heat, a crevice attachment, and a dedicated water-only rinse setting.
Who Should Avoid This: Shoppers who want the lowest upfront price or who specifically need the Pet Hair Removal Tool included in the box.
Pros:
- Integrated ProHeat system actively heats the water-and-formula mixture to 120°F.
- SmartMix automatically controls the formula-to-water ratio to help prevent sticky residue.
- Switchable Rinse Mode lets you perform a clean-water rinse pass without emptying the tank.
- Includes both a Self-Cleaning Tough Stain Tool and a Spraying Crevice Tool.
Cons:
- 32 oz. clean tank holds slightly less than the classic 2513G model’s 37 oz. tank.
- Weighs 9.7 lb. empty (some third-party listings inaccurately list 5 lb.) and does not include the dedicated Pet Hair Removal Tool.
- Corded operation limits reach to the combined cord-and-hose working radius.
Bottom Line: Choose the ProHeat SmartMix 3935 if you clean upholstery, car seats, and household spills frequently and want active heating paired with foolproof mixing and a one-switch water rinse.
3. BISSELL Little Green ProHeat Portable Carpet Cleaner 2513G
Best Value: The Little Green ProHeat 2513G is the classic, time-tested member of the lineup and a practical pick for everyday food spills, muddy tracks, carpeted stairs, upholstery, and car detailing. At 37 oz., its clean water tank holds 5 oz. more solution than the two newer actively heated models.
The crucial distinction to understand before buying is how it handles water temperature. Instead of an electric heating element, the 2513G uses HeatWave Technology, which channels warm air from the vacuum motor to help maintain the temperature of warm tap water you put into the tank. It does not actively heat cold water to 120°F. To get warm-water cleaning performance, simply fill the tank with warm tap water (up to 140°F max as directed in the manual—never boiling water).
The 2513G weighs 9.2 lb. and comes with a 3-inch Tough Stain Tool, a 3-in-1 Stair Tool designed to fit outer stair edges, inner crevices, and flat treads, and a HydroRinse Self-Cleaning Hose Tool. Its slim footprint stores easily in a utility closet or under a sink, though its compact tanks and hand wands still make it a spot cleaner rather than a whole-room carpet washer.
Key Specifications:
- Heating Technology: HeatWave Technology (maintains warm tap-water temperature; no active heating element)
- Tank Capacity: 37 oz. clean tank / ~31.5 oz. dirty collection tank
- Cord & Hose Length: 15 ft. power cord / 4.5 ft. flexible hose
- Weight: 9.2 lb. (empty)
- Included Attachments: 3″ Tough Stain Tool, 3-in-1 Stair Tool, HydroRinse Self-Cleaning Hose Tool
Why You’ll Like It: It delivers the proven Little Green spray-scrub-suction extraction process, a versatile 3-in-1 stair attachment, and the largest clean tank of the three ProHeat models without charging extra for an onboard heater or dual-chamber SmartMix dispenser.
Who Should Buy This: Value-focused shoppers who mainly tackle localized stains or carpeted stairs and don’t mind filling the tank with warm tap water at the sink.
Who Should Avoid This: Buyers who specifically want an internal heater that warms cold water to 120°F or a rubberized pet-hair removal attachment.
Pros:
- 37 oz. clean tank allows slightly longer spot-cleaning sessions between refills.
- HeatWave Technology helps keep added warm tap water from cooling down quickly.
- Includes a specialized 3-in-1 Stair Tool alongside the 3″ stain brush and HydroRinse hose tool.
- Slim, lightweight 9.2 lb. profile is easy to carry and store.
Cons:
- Does not actively heat cold water on its own.
- Requires manually measuring water and cleaning formula to the tank fill lines.
- Built for targeted spot and stair cleaning rather than full-room extraction.
Bottom Line: If you have easy access to warm tap water and want a dependable, lower-cost spot cleaner with a stair tool and a 37 oz. tank, the 2513G remains an excellent value.
How We Evaluated These BISSELL Little Green ProHeat Models
Because BISSELL uses the “Little Green ProHeat” name across multiple generations and retail bundles, it is easy for shoppers to mix up older temperature-maintenance units with newer actively heated machines. To compare these three models fairly, we evaluated each unit across five practical criteria:
- Heating Mechanism: Whether the machine uses an internal electric heater to raise solution temperature to 120°F (ProHeat Pet and SmartMix 3935) or relies on motor heat to maintain warm tap water (2513G).
- Attachment Utility: How well the included hand tools match real-world messes such as embedded pet hair, carpeted stair corners, narrow auto crevices, and deep upholstery stains.
- Formula & Rinse Convenience: Whether the cleaner requires manual measuring at the sink or automates mixing and clean-water rinsing.
- Tank Capacity vs. Portability: The balance between clean/dirty tank volume and carrying weight when hauling the machine up stairs or out to a vehicle.
- Ease of Cleanup: How effectively the included self-cleaning nozzles or HydroRinse caps flush trapped hair and dirty water out of the hose after a messy job.
Factors to Consider When Choosing a BISSELL Little Green ProHeat
The right model depends on the types of stains you clean, how often pet accidents happen, and whether you value active heat, automatic formula mixing, pet-hair tools, or a larger clean tank. Keep in mind that all three are portable wet-extraction machines for targeted cleaning—not substitutes for a full-size upright carpet cleaner or a dry vacuum.
Active Heat vs. HeatWave Temperature Maintenance
Do not assume every product with “ProHeat” in its title heats water the same way. The ProHeat Pet and ProHeat SmartMix 3935 use an integrated heater that warms the cleaning mixture to 120°F in under 30 seconds. The classic 2513G uses HeatWave Technology to help maintain the temperature of warm tap water you pour into the tank. Choose one of the newer models when active onboard heating is a priority; choose the 2513G when budget value and a 37 oz. clean tank matter more.
Pet Tools and Stain Tools
The ProHeat Pet is the strongest match when embedded fur is part of the mess because it includes a dedicated Pet Hair Removal Tool. The SmartMix 3935 swaps that out for a Spraying Crevice Tool designed for narrow gaps along cushions and car seats. The 2513G includes a 3-in-1 Stair Tool and a separate snap-on HydroRinse hose tool. Always verify the exact package contents on the product listing page, as tool bundles can vary by model suffix.
Tank Capacity and Job Size
The 2513G holds 37 oz. of clean solution, while the ProHeat SmartMix 3935 and ProHeat Pet use 32 oz. clean tanks paired with 27 oz. dirty collection tanks. These capacities are ideal for isolated pet accidents, a flight of stairs, car mats and seats, or sofa cushions. For wall-to-wall carpeting across multiple rooms, a full-size upright carpet extractor will save you frequent tank refills and kneeling work.
Cord, Hose, and Portability
All three models are corded and include a 15 ft. power cord alongside a 4.5 to 4.8 ft. hose. Corded power guarantees steady suction without waiting on battery charges, though you may need a heavy-duty extension cord when detailing a car parked in a driveway. Dry weight ranges from 9.2 to 9.7 lb., and a full tank of water adds roughly 2 to 2.5 lb., so empty the dirty tank before carrying the machine up or down stairs.
Surface Compatibility
Use these cleaners only on materials rated for water-based extraction. Before cleaning upholstery or accent chairs, check the manufacturer’s care tag under the cushion:
- “W” or “WS” Codes: Generally safe for water-based extraction solutions.
- “S” (Solvent Only) or “X” (Vacuum/Brush Only) Codes: Must never be cleaned with water, as moisture can cause water rings, shrinkage, or fabric damage.
Always test a hidden area for colorfastness first, avoid oversaturating foam cushions, and never use a wet extractor on silk, velvet, untreated leather, or hard floors.
Formula and Maintenance
Use only low-foaming formula designed for BISSELL portable carpet cleaners, and add an enzyme-based or oxy-boosted BISSELL pet formula when treating urine, vomit, or organic odors. After every session, empty and rinse both tanks with warm water, flush the hose using the self-cleaning tool or HydroRinse attachment, wash removable brush heads, and let all parts air-dry before storage to prevent sour odors in the dirty tank.
Before You Buy
- Confirm the exact model number and included attachments on the Amazon listing.
- Decide whether you want active 120°F heating (ProHeat Pet / SmartMix 3935) or warm-tap-water maintenance (2513G).
- Check upholstery care tags (“W” or “WS” only) before spraying furniture.
- Remember that filled water tanks add roughly 2+ lb. to the carrying weight.
- Choose a full-size upright extractor if your main goal is cleaning entire carpeted rooms.
How the ProHeat Series Compares to Other BISSELL Little Green Models
If you are cross-shopping the broader BISSELL portable lineup, it helps to know how the ProHeat series fits beside two other popular models:
- Standard BISSELL Little Green (1400B): The classic green 1400B does not include an internal heater or HeatWave venting, so water cools at normal room rate. However, it features a larger 48 oz. clean tank, making it a popular basic option if you prefer extra tank volume over heated cleaning.
- BISSELL Little Green Pet Pro (2891B / 3909): The Pet Pro steps up to a heavier-duty body (~13 lb.) with a larger motor, longer cord and hose reach, and larger tanks, trading compact lightness for stronger commercial-style suction.
Step-by-Step Tips for Cleaning Pet Stains and Odors
- Vacuum or Blot First: For dry dirt or shedding, vacuum loose hair first (or use the Pet Hair Removal Tool). For fresh liquid accidents, press dry paper towels or a microfiber cloth firmly into the spot to blot up as much liquid as possible before wetting the area.
- Pre-Treat Stubborn Urine or Set-In Spots: Spray the stained area lightly with solution and let it sit for 3 to 5 minutes so the formula can break down proteins and odor compounds before scrubbing.
- Make Slow Wet Passes, Then Multiple Dry Passes: Hold the spray trigger while pulling the nozzle slowly across the stain, then release the trigger and make 3 to 4 slow suction-only passes with downward pressure to extract deep moisture.
- Speed Up Drying: Point a box fan or ceiling fan toward the damp spot so the carpet pad or cushion dries within a few hours.
Brand Commitment to Pets
BISSELL states that product purchases help support the BISSELL Pet Foundation and its mission to reduce pet homelessness through adoption and spay/neuter programs. While that mission is a welcome bonus for animal lovers, make your final model choice based on heating method, tool package, tank size, and household cleaning needs.
Frequently Asked Questions
Do All BISSELL Little Green ProHeat Models Heat Water?
No. The ProHeat Pet and ProHeat SmartMix 3935 use an integrated heater to actively warm the cleaning mixture to 120°F. The classic ProHeat 2513G does not actively heat cold water; its HeatWave system uses warm motor air to help maintain the temperature of warm tap water you add to the tank.
Which Model Is Best for Pet Hair and Urine Messes?
The Little Green ProHeat Pet is the best direct match because it pairs active 120°F heating with a dedicated Pet Hair Removal Tool and a Self-Cleaning Tough Stain Tool. For urine odors, pair the machine with a BISSELL enzyme or oxy pet formula, treat slightly beyond the visible border of the spot, and make extra dry suction passes.
How Does the Little Green ProHeat Differ From the Standard Little Green 1400B?
The standard Little Green 1400B has no heating system or HeatWave temperature maintenance, whereas the ProHeat series either actively heats solution to 120°F (ProHeat Pet and SmartMix 3935) or maintains warm tap water (2513G). The 1400B is heavier when full because it uses a larger 48 oz. tank, while ProHeat models are more compact at 32 oz. to 37 oz.
Can I Use a Little Green ProHeat on Upholstery and Car Seats?
Yes, as long as the fabric care label is marked “W” or “WS” for water-based cleaning. Test an inconspicuous spot first, avoid leather, silk, velvet, and seat-heater electronics, and make extra suction passes so foam padding is not left soaked.
Can I Use Dish Soap or Regular Carpet Shampoo in the Tank?
No. Dish soap, laundry detergent, and high-sudsing upright carpet shampoos create excessive foam that can leak into the vacuum motor, clog the internal pump or heater, and void the warranty. Always use low-foaming formula specifically labeled for portable carpet and upholstery extractors.
Is a Portable Cleaner Enough for an Entire Room?
It can handle high-traffic patches or area rugs in a pinch, but the 3-inch to 4-inch hand tools and 32–37 oz. tanks make wall-to-wall rooms tedious. Use a full-size upright carpet washer for whole rooms, and keep a Little Green ProHeat for stairs, upholstery, pet beds, car interiors, and sudden spills.
What Is the Warranty Period?
Warranty coverage varies by model generation and retail bundle. BISSELL provides a two-year limited consumer warranty for the classic 2513G. Always check the official warranty sheet linked on the specific Amazon product page for newer ProHeat Pet and SmartMix 3935 models before purchasing.
Can I Descale the Machine With Vinegar?
Do not run vinegar, bleach, or homemade descalers through the cleaner unless the owner’s manual for your exact model explicitly allows it, as acids can degrade internal seals and heating components. Instead, rinse the clean tank and flush the hose with clean warm water after every use.
Are Replacement Parts Available?
Yes, BISSELL sells model-specific replacement tanks, caps, hoses, and brush tools. Because tanks and hose cuffs are not interchangeable across all generations, search by your machine’s exact model number (printed on the rating label behind the tank) before ordering parts.
Final Recommendation
Choose the BISSELL Little Green ProHeat Pet when pet accidents, lingering odors, and embedded fur are your primary cleaning challenges. Choose the ProHeat SmartMix 3935 when you want active 120°F heating paired with automatic formula mixing, a crevice tool, and a one-switch water-only rinse mode. Choose the classic ProHeat 2513G when you want a dependable, value-focused spot and stair cleaner with a larger 37 oz. clean tank and are comfortable filling it with warm tap water.
Whichever model you select, verify the included tool bundle on the listing, use it only on water-safe fabrics, follow every wet spray with several slow dry suction passes, and flush the hose and tanks clean before storing.
