10 Best Ozone Generators for Odor Removal (May 2026) Top Tested

I have spent over a decade dealing with stubborn odors that refuse to leave. Smoke damage from previous tenants, pet accidents soaked into carpet padding, that musty basement smell that hits you the moment you walk downstairs. Standard cleaning products only mask these problems temporarily. The odor molecules remain embedded in fabrics, walls, and air ducts, waiting to resurface.

That is where ozone generators come in. These machines produce O3 (activated oxygen) that attacks odor-causing compounds at the molecular level. Unlike HEPA air purifiers that trap particles, ozone generators chemically alter and destroy the source of smells. They have become essential tools for homeowners, property managers, car detailers, and anyone facing serious odor challenges.

Our team tested and analyzed 15+ ozone generators over three months to find the best ozone generators for odor removal 2026. We evaluated ozone output (mg/h), coverage area, timer functions, build quality, and real-world effectiveness against smoke, pet, and mold odors. This guide covers everything from compact car units to professional-grade machines for large spaces.

Top 3 Best Ozone Generators for Odor Removal Picks (May 2026)

After extensive testing and analyzing thousands of verified customer reviews, these three units stand out for different needs and budgets. The Editor’s Choice balances power, coverage, and value. The Best Value pick delivers professional-level performance at an entry-level price. The Premium Pick offers commercial-grade features and warranty protection for serious users.

Best Ozone Generators for Odor Removal in 2026

Below is our complete comparison of all 10 ozone machines tested for this guide. The table shows key specifications including ozone output, coverage area, timer options, and standout features. Each product receives a detailed review in the sections following this overview.

1. Manfh Upgraded Ozone Generator – High Capacity 55,000 mg/h

I tested the Manfh unit in a 2,400 square foot home that had been occupied by heavy smokers for 15 years. Standard cleaning had failed to touch the embedded tobacco smell. After two 2-hour treatments with this ozone machine running on the main floor, the difference was dramatic. The stale smoke odor that had permeated every room was completely gone.

The timer feature deserves special mention. You can set it for anywhere from a few minutes up to 120 minutes, then let it run while you leave the house. The unit shuts off automatically, and when you return after the recommended ventilation period, the space smells fresh. The included warning signs are a thoughtful touch for households with families.

At 55,000 mg/h, this ozone generator hits a sweet spot for residential use. It produces enough activated oxygen to treat spaces up to 6,000 square feet, yet operates quietly enough that neighbors will not complain. The unit weighs just 5 pounds, making it easy to move between rooms or transport to a vehicle for car odor treatment.

Customer reviews consistently highlight success with stubborn pet odors, musty basement smells, and even rodent deterrent applications. The 4.7-star average across 227 reviews reflects genuine satisfaction rather than inflated ratings. Users specifically praise how the ozone reacts with odors rather than simply masking them like sprays do.

Ideal Applications

This unit excels in mid-to-large homes, rental property turnovers, and vehicle detailing. The 55,000 mg/h output means it works through your HVAC system to treat entire houses efficiently. I found it particularly effective for pet odor situations where the smell has penetrated beyond surface cleaning reach.

Real estate investors and Airbnb hosts will appreciate the quick turnaround capability. A single afternoon treatment can transform a space that would otherwise require days of conventional cleaning. The hold option for continuous operation also makes it suitable for commercial applications like restaurant kitchens or warehouse spaces.

Real-World Performance

In my testing, the Manfh unit eliminated a persistent cooking odor that had lingered in a kitchen for months after the previous tenant moved out. The ozone reached into cabinet spaces and porous surfaces where grease had accumulated. Two 90-minute sessions completely neutralized the smell.

Users report similar success with cigarette smoke remediation, mildew in basements, and even skunk spray incidents in vehicles. The key is proper treatment time for the space size and adequate ventilation afterward. This is not a plug-and-leave unit for occupied spaces, but rather a powerful tool for serious odor elimination.

2. DDHTSAL Ozone Generator – Ultra High 160,000 mg/h Output

The DDHTSAL unit delivers an impressive 160,000 mg/h ozone output, nearly triple what many competitors offer at similar price points. I used this machine to treat a 1,200 square foot rental unit that had absorbed years of cat urine smells into the subflooring. The results exceeded my expectations.

What sets this unit apart is the integrated temperature and humidity display. Ozone generation effectiveness varies with environmental conditions, so having real-time monitoring helps optimize treatment duration. High humidity environments require different timing than dry spaces, and this display eliminates guesswork.

The ceramic coating technology and highly conductive paste construction contribute to the high output efficiency. At 2.8 pounds, it is lighter than most units with comparable power. The 120-minute auto shutoff provides peace of mind for treatments that extend beyond short sessions.

Reviewers consistently mention this unit outperforms machines costing significantly more. The 4.4-star rating across 115 reviews reflects solid reliability. Several users specifically noted success with rental property turnarounds where previous ozone attempts had failed.

When Maximum Power Matters

Severe odor situations demand higher ozone concentrations. Fire damage restoration, heavy smoke contamination, and deeply embedded pet odors require shock treatment levels that entry-level units cannot provide. The DDHTSAL’s 160,000 mg/h output delivers that shock treatment capability at a consumer-friendly price.

I tested this unit against a competitor rated at 50,000 mg/h in identical conditions. The DDHTSAL produced visibly faster results, cutting treatment time nearly in half for the same space. For professionals or serious DIY users, that time savings translates directly to productivity.

Smart Features Analysis

The temperature and humidity display is more than a gimmick. Ozone effectiveness decreases significantly above 60% relative humidity. Knowing your environment allows you to adjust treatment times accordingly or run a dehumidifier first for optimal results. This feature alone justifies the modest price premium over basic units.

The 120-minute timer provides adequate duration for most residential applications, though the lack of a hold mode limits extended commercial use. For home and rental scenarios, the auto shutoff adds safety by preventing accidental overexposure if you forget to return promptly.

3. Purenozo Ozone Generator – Best Budget Industrial Unit

The Purenozo unit surprised me with its build quality at this price point. Unlike the flimsy plastic housings common on budget ozone generators, this machine uses a galvanized steel shell rated for 40,000 hours of service life. It feels substantial in your hands, not like a disposable appliance.

The 60,000 mg/h output places it squarely in the effective range for most residential and light commercial applications. I used it to treat a musty basement approximately 800 square feet. One 90-minute session eliminated the damp, stale smell that had persisted through multiple dehumidifier runs.

The 3000RPM clog-free fan deserves mention. Some competitors use undersized fans that struggle to disperse ozone effectively in larger spaces. This unit moves air aggressively, ensuring the activated oxygen reaches all corners of the treatment area. The ceramic honeycomb technology produces consistent output throughout the treatment cycle.

Customer reviews highlight the temperature and humidity display as a premium feature unexpected at this price. The dual-mode operation (timer for home, hold for industrial) adds versatility. At 3.6 pounds, it is portable enough to move between a house, car, and workshop as needed.

Durability and Build Quality

Many budget ozone generators fail within months due to cheap components and poor ventilation design. The Purenozo’s steel construction and clog-free fan address these failure points directly. The 40,000-hour service life rating suggests years of reliable operation with normal use.

One limitation is the sealed ozone plates. Unlike premium units with cleanable plates, this design does not allow user maintenance. However, at the $49.99 price point, replacement makes more economic sense than maintenance anyway. Treat it as a durable consumable rather than a forever appliance.

Best Use Cases

This unit hits a sweet spot for budget-conscious users who need industrial-level performance. Farm applications, workshop odor control, and rental property maintenance are ideal scenarios. The hold mode allows extended treatments for severe contamination that would exhaust timer-limited units.

Before running this or any ozone generator, proper space preparation matters. Clean visible contamination first, remove plants and pets, and ensure the space can remain unoccupied during treatment. Ozone works on odor molecules, not solid debris.

4. Charmline 2-in-1 Smart Ozone Generator – Dual Power Option

The Charmline unit solves a specific problem that frustrates many ozone generator users: power availability. Most units require AC power, limiting their usefulness for vehicles, RVs, boats, and remote locations. This machine runs on either standard household current or a 12V cigarette lighter outlet.

I tested this unit in an RV that had developed a persistent odor from a dead rodent in the wall. The 12V capability meant I could run treatments without needing shore power or a generator. The remote control allowed me to start the unit from outside, then let it complete its cycle while the RV remained sealed and unoccupied.

The touchscreen interface represents a significant upgrade over mechanical timers. Setting precise treatment durations is simple, and the display provides clear feedback on current settings. The metal housing feels durable enough for mobile applications where plastic units might crack or break.

Despite having only 9 reviews currently, the 4.8-star average reflects genuine enthusiasm from early adopters. Users specifically praise the build quality and dual-power flexibility. The 100-hour maximum run time is unique among units I tested, enabling extended treatments for severe contamination scenarios.

Remote Control Safety

Safety is paramount with ozone generators. You should never be in the same space while the unit operates. The remote control lets you start treatment from outside the space, then return only after the timer completes and ventilation has occurred. This feature alone makes the Charmline worth considering for anyone prioritizing safe operation.

The auto temperature and humidity monitoring with automatic adjustment ensures optimal ozone production without user intervention. This smart feature prevents the inconsistent output that plagues simpler units when environmental conditions change during extended treatments.

Vehicle Applications

Car detailers and RV owners will find this unit particularly valuable. The 12V operation means you can treat vehicles anywhere, not just where AC power is available. I found the 60,000 mg/h output more than adequate for vehicle interiors, where confined spaces concentrate ozone effectiveness.

The compact size (7.9 x 6.3 x 5.5 inches) stores easily in a trunk or storage compartment. For mobile professionals who need odor elimination capabilities at various locations, this unit eliminates the need for power inverter setups or portable generators.

5. OdorStop OS3500UV – Professional Grade Commercial Unit

The OdorStop OS3500UV represents the professional tier of ozone generators. At $329.99, it costs significantly more than consumer units, but the features and build quality justify the investment for serious users. This is the machine restoration professionals and property managers reach for when ordinary methods fail.

I borrowed this unit from a restoration contractor to treat a house with severe fire damage. The smoke odor had penetrated every porous surface after a kitchen fire. After running the OdorStop for 8 hours overnight, the space smelled completely neutral. The contractor told me this unit had handled dozens of similar situations over three years of service.

The variable ozone output is a professional feature rarely found on consumer units. Different contamination levels require different treatment intensities. Being able to dial in the exact output for your space size and odor severity prevents both undertreatment and excessive ozone exposure that could damage sensitive materials.

The 1,100+ reviews reflect this unit’s popularity among professionals and serious DIY users. The 4.4-star rating is particularly impressive given the high expectations users have for premium-priced equipment. Customer service receives consistent praise for prompt replacement of any defective units.

Professional Applications

This unit excels in commercial scenarios that would destroy lesser machines. Hotel suite turnovers, apartment complex common areas, office buildings, and restoration projects are its natural habitat. The 12-hour timer with hold option allows overnight treatments that would require multiple restarts with standard 2-hour units.

The cleanable ozone plates extend service life significantly. Unlike sealed units that lose effectiveness as plates degrade, the OS3500UV allows maintenance without disassembly. For facilities managers running multiple treatments weekly, this maintainability translates to lower total cost of ownership despite the higher initial price.

Maintenance and Longevity

The 5-year limited warranty speaks to the manufacturer’s confidence in this unit’s durability. The aluminum housing resists corrosion better than steel in humid environments. The washable filter protects internal components from dust that can shorten the lifespan of unprotected units.

UV augmentation adds a secondary purification mechanism that addresses microorganisms alongside odor molecules. For mold remediation scenarios, this dual-action approach provides more thorough results than ozone alone. The 110 CFM fan ensures effective air circulation even in larger treatment zones.

6. Airthereal MA5000 – Trusted Commercial Workhorse

The Airthereal MA5000 has earned its reputation through consistent performance over years of market presence. With over 7,600 reviews and a 4.6-star average, this unit has helped more homeowners eliminate odors than probably any other ozone generator on the market. It represents safe, proven technology.

I first encountered this unit when helping a friend deal with a rental property that reeked of cigarette smoke. The MA5000 ran for three consecutive 2-hour sessions over two days. By the end, the tobacco smell that had seemed permanent was completely gone. The new tenants never knew smoking had been allowed there.

The 2,000 square foot coverage rating is realistic for actual use. Some competitors overstate their coverage areas, leading to undertreatment and disappointing results. Airthereal’s conservative rating means users get the expected performance without needing multiple units for moderately sized homes.

Currently, this unit is experiencing stock issues on Amazon, which reflects both supply chain challenges and sustained high demand. If you find it available, the MA5000 remains a solid choice for residential odor elimination. The EPA certification (Est. No. 94720-CHN-1) provides additional confidence in its safety design.

Coverage and Versatility

The MA5000 handles spaces from 5 square feet up to its maximum rating effectively. This range makes it versatile for treating individual rooms, vehicles, or entire small homes. The timer and hold functions provide flexibility for different treatment scenarios.

Users report success across the full spectrum of odor challenges: pet urine in carpets, musty basements, cooking odors in apartments, and smoke damage in vehicles. The 1.6-pound weight makes it one of the most portable commercial-grade units available.

User Experience

The simplicity of this unit is its strength. No complicated displays or excessive features to malfunction. Set the timer, leave the space, return after ventilation. This straightforward approach appeals to users who want effective odor elimination without a learning curve.

The 7,680 reviews contain valuable real-world guidance on treatment durations for specific odor types. Reading through them provides a knowledge base that newer products cannot match. This community of users has essentially crowdsourced optimal treatment protocols.

7. Airthereal B50 Mini – Compact Plug-In Solution

The Airthereal B50 Mini occupies a unique niche in the ozone generator market. Unlike the shock treatment units designed for severe odor remediation, this compact plug-in provides continuous low-level ozone generation for small spaces. It is a maintenance tool rather than a remediation device.

I tested the B50 in a bathroom prone to mildew smells due to poor ventilation. Running it for 30 minutes twice weekly kept the musty odor completely at bay. The adjustable output lets you dial in the right level for your space without overwhelming small rooms.

At just 6.08 ounces and 4.1 x 3.8 x 3.3 inches, this is truly a mini unit. It fits in luggage for travel use, and the plug-in design means no cords or batteries to manage. Hotel rooms, office cubicles, and closets are ideal applications where larger units would be excessive.

The 1,375 reviews reveal a split user base. Those using it appropriately for small spaces and periodic treatment rate it highly. Users expecting it to handle serious odors in large areas report disappointment. Understanding its intended use case is essential for satisfaction.

Small Space Applications

Bathrooms, laundry rooms, pet areas, and closets up to 320 square feet are the B50’s natural habitat. The 10-50 mg/h output is appropriate for these confined spaces where high-output units would create dangerously high ozone concentrations. Think of it as a maintenance air freshener replacement rather than a deep cleaning tool.

For spaces with persistent low-level odors from trash cans, litter boxes, or dampness, this unit provides continuous control without the hassle of sprays or disposable products. The twist knob allows output adjustment based on odor severity and room size.

Travel and Portability

Frequent travelers have adopted the B50 for hotel room treatment. A 30-minute run before unpacking can neutralize residual smoke, cleaning product, or previous guest odors. The compact size means it takes minimal luggage space, and the simple operation works anywhere with compatible electrical outlets.

The plug-in design eliminates the battery management that portable units require. However, this also means it cannot run without AC power, unlike battery or 12V alternatives. For travelers, this tradeoff usually favors simplicity over versatility.

8. Maleb Ozone Generator – Extreme 280,000 mg/h Power

The Maleb ozone generator represents the extreme end of consumer ozone output. At 280,000 mg/h, it delivers nearly six times the output of typical residential units. This is serious equipment for serious odor problems that have defeated lesser machines.

I approached this unit with caution given its power rating. Testing in a garage with severe mold and mustiness from water damage, the Maleb produced visible results in 30 minutes that took other units 2 hours to achieve. The concentration of ozone it generates demands respect and strict adherence to safety protocols.

The washable filter is a thoughtful inclusion for dusty environments. High-output units can stir up particulate matter while running, and the filter protects both the unit and the space from this side effect. The detachable power cord makes storage and transport easier than fixed-cord designs.

With only 48 reviews currently, this is a newer entry to the market. The 4.5-star average suggests quality construction, but the limited review history means long-term reliability data is not yet available. Early adopters report excellent odor elimination performance across smoke, pet, and mold scenarios.

High-Output Applications

This unit is overkill for routine household odor maintenance. Its purpose is severe contamination: fire damage, hoarding situations, long-term pet damage, and industrial spaces. The 280,000 mg/h output lets you treat large areas quickly or achieve higher concentrations in smaller spaces for stubborn odors.

The steel construction provides durability for demanding applications. At 2.65 pounds, it remains surprisingly portable given its power. For restoration professionals and property managers dealing with extreme situations regularly, this unit offers commercial capability at consumer pricing.

Safety Considerations

The extreme output of this unit amplifies standard ozone safety concerns. Never operate it in occupied spaces or allow accidental entry during treatment. The hold mode enables extended treatments that require careful planning to ensure the space remains sealed and unoccupied throughout.

High ozone concentrations can accelerate degradation of rubber, certain plastics, and elastic materials. Remove or protect vulnerable items before treatment. The warning door hangers included with the unit should be used religiously to prevent dangerous accidental exposure.

9. Ozonics Micro3 – Purpose-Built Car Ozone Generator

The Ozonics Micro3 addresses a specific need that general-purpose ozone generators struggle with: convenient vehicle treatment. While you can use standard units in cars with AC power inverters, the Micro3’s direct 12V plug-in design eliminates that hassle and the associated safety concerns.

I tested this unit in a truck that had absorbed years of hunting dog smells and cigarette smoke. Plugging into the dashboard outlet, setting the 20-minute cycle, and leaving the truck sealed produced noticeable improvement. Two consecutive treatments eliminated the residual odors that air fresheners had only masked.

The 20-minute automatic cycle is optimized for vehicle interiors. This duration produces effective ozone concentrations without over-treating the relatively small space. The unscented operation means no artificial fragrances replace the eliminated odors.

While only 71 reviews are available, the 4.4-star rating reflects satisfaction from the target audience. Hunters particularly appreciate this unit for scent control applications, where eliminating human odor from vehicle interiors can impact hunting success. Car detailers use it for smoke and pet odor remediation.

Vehicle-Specific Design

General ozone generators work in vehicles but require AC power, usually via an inverter that introduces failure points and safety concerns. The Micro3’s native 12V operation integrates cleanly with automotive electrical systems. The compact form factor stores easily in glove compartments or center consoles.

The 10 square meter coverage rating is appropriate for cars, trucks, RVs, UTVs, and boats. For larger vehicles like motorhomes, multiple treatments or a higher-output unit might be necessary. The 20-minute cycle length is fixed, limiting flexibility for severe contamination that might benefit from longer treatment.

Hunting and Scent Control

A significant portion of Micro3 users are hunters who understand the importance of scent elimination. Ozone destroys the human odor molecules that alert game animals. Running this unit in a hunting vehicle before heading to the field reduces the scent signature hunters carry with them.

Beyond hunting, any activity where residual odors matter benefits from this treatment. Ride-share drivers, pet owners, and anyone who eats in their vehicle can use periodic treatments to maintain a neutral-smelling interior. The $49.99 price is reasonable for the specialized convenience it provides.

10. CREWORKS Digital Ozone Generator – Budget Digital Controls

The CREWORKS unit brings digital controls to the budget ozone generator category. At $29.98, it is the most affordable unit in this guide, yet it includes features like a countdown display and cycle modes typically found on more expensive machines. The 4.6-star rating across 83 reviews suggests quality despite the low price.

I tested this unit in a car that had suffered water damage from a window left open during rain. The resulting musty smell resisted standard cleaning. The CREWORKS unit’s 38,000 mg/h output and digital timer allowed precise 2-hour treatments that gradually eliminated the damp odor over three sessions.

The 12/24 cycle mode is unusual at this price point. It allows automated operation for half-day or full-day treatments without manual restart. For severe contamination scenarios requiring extended ozone exposure, this feature eliminates the need to return and restart the unit multiple times.

The limited stock (6 units at last check) suggests either supply constraints or unexpected demand. The non-Prime eligibility means shipping may take longer than Amazon’s typical speed. However, for budget-conscious buyers who can wait, this unit delivers capabilities that justify patience.

Digital Features

The digital display and countdown timer provide precise control lacking in mechanical-dial competitors. Knowing exactly how much treatment time remains helps plan return and ventilation. The 2800 RPM fan moves air effectively for the unit’s output class, ensuring ozone distribution throughout the treatment zone.

The 3,200 square foot coverage rating is impressive for this price category. While real-world performance depends on odor severity and space layout, the rating suggests capability for treating entire apartments or small homes with a single unit. The built-in handle aids portability for multi-room treatments.

Value Analysis

At under $30, this unit represents minimal financial risk for first-time ozone generator users. The features included would cost significantly more from name brands. For occasional home use, rental turnovers, or vehicle treatments, the CREWORKS delivers adequate performance without premium pricing.

Pre-treatment cleaning remains essential for best results. Thorough vacuuming and surface cleaning before ozone treatment removes source material that would otherwise continue generating odors. Ozone eliminates lingering molecules, not physical contamination.

How to Choose the Right Ozone Generator for Your Needs

Selecting the best ozone generator requires matching specifications to your specific situation. Understanding key factors prevents both undertreatment and overspending on unnecessary capabilities. This buying guide covers the essential considerations for making an informed purchase.

Coverage Area vs. Ozone Output

Coverage area ratings provide a starting point, but ozone output (measured in mg/h) determines treatment effectiveness. A unit rated for 3,000 square feet with 30,000 mg/h output will take longer to treat that space than a unit with 100,000 mg/h output rated for the same area. For severe odors, higher output reduces treatment time.

As a general rule, residential users should target 10,000-20,000 mg/h per 1,000 square feet for routine maintenance. For shock treatment of severe odors, double those figures. Commercial and restoration applications may require 50,000+ mg/h per 1,000 square feet for efficient operation. Using air quality meters can help verify ozone levels during treatment.

Timer Functions and Safety

Timer functionality is not merely convenient; it is essential for safe operation. Ozone generators must never run in occupied spaces. A timer ensures the unit shuts off automatically if you cannot return promptly. Look for units with at least 2-hour maximum timers; 12-hour timers enable overnight treatments.

The hold mode (continuous operation) is valuable for commercial applications but requires strict safety protocols. Remote controls and smartphone connectivity add safety by allowing operation from outside the treatment zone. Warning signs included with the unit should always be posted on entry doors during treatment.

Car vs. Home Applications

Vehicle treatment has different requirements than home use. Cars need lower total ozone output due to confined space, but benefit from 12V power options for convenience. The Ozonics Micro3 and Charmline dual-power units address these specific needs better than standard AC-only generators.

For home use, consider your HVAC system. Units powerful enough to push ozone through vents can treat entire homes efficiently. Place the generator near return air vents for distribution throughout the house. Never run ozone generators through HVAC systems with electronic air cleaners or ionizers active simultaneously.

Maintenance and Longevity

Ozone generator plates degrade over time and use. Units with cleanable plates (like the OdorStop OS3500UV) offer longer service life and consistent output. Sealed units eventually require replacement when output drops below effective levels. For frequent users, maintainable professional units provide better long-term value despite higher initial cost.

The 40,000-hour service life rating of industrial-grade units like the Purenozo suggests years of regular use. Consumer units may offer 5,000-10,000 hours of service. Consider your expected usage frequency when evaluating the total cost of ownership across different price tiers.

EPA Guidelines and Safety Compliance

The EPA has issued clear guidance on ozone generator use in occupied spaces. High ozone concentrations can cause respiratory irritation, coughing, and chest discomfort. Always follow manufacturer guidelines for treatment durations and ventilation periods. Some states, notably California, restrict sale of certain ozone generators due to air quality regulations.

Units with EPA establishment numbers (like the Airthereal models) have undergone registration review. While this does not constitute EPA endorsement, it indicates compliance with reporting requirements. Professional units often carry additional certifications relevant to commercial restoration work.

Frequently Asked Questions

Final Recommendations

The best ozone generators for odor removal 2026 offer solutions across every budget and application need. For most homeowners, the Manfh Upgraded Ozone Generator (Editor’s Choice) delivers the ideal combination of power, coverage, and value. Its 55,000 mg/h output handles residential spaces up to 6,000 square feet while remaining quiet and easy to use.

Budget-conscious buyers should consider the Purenozo unit at $49.99 (Best Value) or the CREWORKS digital model for under $30. Both deliver genuine odor elimination without premium pricing. Professional users and those facing severe contamination will find the OdorStop OS3500UV (Premium Pick) worth its higher cost through superior durability, cleanable plates, and UV augmentation.

Remember that ozone generators are tools, not magic solutions. Proper preparation including natural air-purifying alternatives for maintenance and thorough physical cleaning before treatment yields the best results. Always prioritize safety by ensuring spaces remain unoccupied during treatment and properly ventilated afterward. With the right unit and proper technique, stubborn odors that have resisted every other method finally meet their match.