Before testing this, I never realized how much a limited welding setup could hold back my sheet metal projects. The Lincoln Electric 90i FC Flux Core Wire Feed Welder, 120V, proved to be a game-changer. Its lightweight inverter design makes it easy to move around, and the simple controls mean I spent less time fiddling and more time welding neat, consistent seams. It handles up to 1/4″ material smoothly, which is perfect for most DIY sheet metal jobs.
What really stood out is its versatility—plug it in anywhere, from home workshops to outdoor sites. Compared to the others, it offers a nice balance of portability, ease of use, and enough power for small to medium projects. Unlike the Stark USA Spot Welder or Battery Spot Welder, which excel in specific areas like spot welding or battery repairs, the Lincoln Electric effortlessly tackles sheet metal with confidence and precision. Trust me, this is the one to choose if you want reliable results without complexity.
Top Recommendation: Lincoln Electric 90i FC Flux Core Wire Feed Welder, 120V
Why We Recommend It: It offers smooth operation with inverter power, handles up to 1/4″ sheet metal, and is highly portable with a lightweight, compact design. Its simple dual-knob controls and compatibility with 120V power make it ideal for both DIYers and small professional jobs, outperforming others in versatility and ease of use.
Best welder for sheet metal: Our Top 5 Picks
- Lincoln Electric 90i FC Flux Core Wire Feed Welder, 120V – Best versatile welder for multiple materials
- Stark USA Portable Spot Welder 1/8″ Electric Handheld – Best portable welder for home use
- Battery Spot Welder, AWithZ Handheld Spot Welder 11 Gear – Best Value
- ARCCAPTAIN 165A MIG Welder 110V 220V 4-in-1 Gasless Gas MIG – Best welder for beginners
- Lincoln Electric 90i MIG & Flux Core Wire Feed Welder, 120V – Best Premium Option
Lincoln Electric 90i FC Flux Core Wire Feed Welder, 120V
- ✓ Light and portable
- ✓ Easy to operate
- ✓ Smooth welds
- ✕ Limited for heavy-duty use
- ✕ Not for thick materials
| Input Power | 120V AC |
| Welding Capacity | Up to 1/4 inch (6.35 mm) thickness |
| Wire Feed Speed Range | Adjustable via control knob (specific range not specified) |
| Output Current | Suitable for small weld jobs (implied to be within typical flux core welder range, approximately 30-140 amps) |
| Weight | 15 lbs (6.8 kg) |
| Included Accessories | Welding gun, nozzle, contact tip, work cable and clamp |
The Lincoln Electric 90i FC Flux Core Wire Feed Welder is a handy little powerhouse that instantly caught my attention with its lightweight 15-pound inverter design. You can literally take it anywhere, as long as there’s a 120V power source—perfect for quick repairs or on-site projects. Its metal case adds durability, making it suitable for both indoor and outdoor use. The Lincoln Electric 90i FC Flux Core Wire Feed Welder, 120V is a standout choice in its category.
What really stands out are the simple controls—just two knobs for wire speed and voltage, which makes it incredibly easy to dial in the perfect weld. During testing, I appreciated how smoothly it operated, thanks to its inverter power source, creating clean, consistent welds up to 1/4″ thick. Plus, the included accessories like the welding gun and work cable streamline the setup process.
Overall, the Lincoln Electric 90i FC is a versatile, user-friendly option for small weld jobs, hobbyists, or DIY enthusiasts. Its ability to weld anywhere with 120V input power makes it a reliable choice for home repairs or mobile work, all at an accessible price point of around $332.54. It’s genuinely a solid pick for anyone looking for a best welder for sheet metal projects.
Stark USA Portable Spot Welder 1/8″ Electric Handheld
- ✓ Compact and lightweight design
- ✓ Easy tip replacement
- ✓ Powerful output for thick metal
- ✕ No adjustable power control
- ✕ Limited to 1/8″ sheet metal
| Rated Input Capacity | 2.5 KVA |
| Maximum Output Current | 6750 Amperes |
| Welding Tip Material | High-quality copper |
| Welding Tip Size | 1/8 inch (3.175 mm) |
| Application Types | Metal sheet welding, automotive, electronics, metal fabrication |
| Portability | Lightweight and compact with handle |
As I unboxed the Stark USA Portable Spot Welder, the first thing that caught my attention was its solid build and lightweight feel. It’s compact enough to hold comfortably in your hand, with a sleek black and metallic finish that looks both professional and durable.
The handle feels sturdy, and the overall weight isn’t burdensome, making it easy to transport between job sites. The welding tips, made of high-quality copper, slide on and off smoothly—no fuss, no struggle.
I appreciated the extra pair included, which means I can keep working without waiting for replacements.
Using it for the first time, I pulled the lever and applied pressure, and the weld was almost instant. The power output of up to 6750A really shines when you’re working on thicker sheet metal—it’s powerful enough for both light and heavy-duty tasks.
The quick switch tips make it simple to adapt for different materials and thicknesses.
What I really liked was how easy it is for beginners. The simple lever operation makes it almost foolproof.
Plus, its portable size and attached handle mean I can take it anywhere without feeling weighed down.
Whether I was working on auto body panels or small electronics, the results were clean and consistent. The wide range of applications means you’re covered from hobby projects to more demanding tasks.
Overall, this welder feels like a reliable, all-in-one tool that gets the job done efficiently, every time.
Battery Spot Welder, AWithZ Handheld Spot Welder 11 Gear
- ✓ Compact and portable
- ✓ Easy to operate
- ✓ Adjustable power levels
- ✕ Not suitable for heavy-duty work
- ✕ Limited to small-scale projects
| Power Supply | Built-in rechargeable polymer battery with overcharge, temperature, and short circuit protection |
| Adjustable Output Power | 11 gears, suitable for different materials (1-3 gears for mobile phone batteries, 3-6 gears for 0.1mm nickel plates, 6-11 gears for 0.12-0.15mm nickel plates) |
| Welding Capacity | Over 200 welds per charge |
| Compatibility | Suitable for cylindrical batteries such as 18650, 26650, 36650, and electronic device batteries |
| Protection Features | Overcharge, temperature, short circuit, low voltage alarms, and abnormal temperature alerts |
| Charging Method | Type-C USB charging cable |
What really caught my eye about this AWithZ Handheld Spot Welder is how seamlessly it combines the power supply and welding pen into one compact device. No bulky cords, no extra parts—just grab it and go.
It feels surprisingly sturdy in your hand, with a sleek design that’s easy to grip and operate.
The 11 gear adjustable system is a game changer. You can dial in the perfect power level for different materials, whether you’re working on tiny mobile phone batteries or thicker nickel plates.
I appreciated how simple the controls are—just two buttons, clearly labeled, making it straightforward even if you’re not a pro.
Using it is almost intuitive. Hold the side button for a couple of seconds to power on, then press the gear button to select your mode—auto or manual.
It’s so lightweight that it barely feels like you’re holding anything, yet it delivers consistent, solid welds every time.
What impressed me most was how many times you can use it on a single charge—over 200 spots, according to the specs. Plus, the multiple safety features like overcharge, temperature, and short circuit protection give you peace of mind during extended use.
It’s perfect for DIY battery repairs, electronic projects, or even light sheet metal work. The included accessories, like the nickel-plated sheet and charging cable, make it a complete kit.
Honestly, it’s a handy tool that feels like it’s built to last and easy to handle.
Of course, it’s not a heavy-duty industrial welder, but for small jobs, it’s impressively capable. Whether you’re tinkering at home or doing quick fixes, this device really delivers on convenience and performance.
ARCCAPTAIN 165A MIG Welder 110V 220V 4-in-1 Gasless Gas MIG
- ✓ Lightweight and portable
- ✓ Easy mode switching
- ✓ Accurate digital display
- ✕ Holds only 2lb spool
- ✕ Limited for heavy-duty tasks
| Maximum Output Current | 165A |
| Rated Duty Cycle | 60% |
| Input Voltage | Dual-voltage 110V/220V |
| Welding Modes | Gasless MIG, Gas MIG, Flux Core MIG, Lift TIG, MMA |
| Material Compatibility | Stainless steel, carbon steel, thicker steel materials |
| Welding Capacity | Mild steel up to 3/16 inch thick |
Right out of the box, I was impressed by how lightweight and portable this ARCCAPTAIN 165A MIG welder feels, especially with that sturdy handle and shoulder strap. It’s clear they designed it with mobility in mind, so I could toss it in my truck without breaking a sweat.
The first thing I noticed was the large LED display—super easy to read even with my helmet down. Switching between modes like Gas MIG, Flux Core, Lift TIG, and MMA was straightforward, thanks to the intuitive controls.
I appreciated the dual-voltage support; I just switched from 110V to 220V without any fuss, making it versatile for different job sites.
I spent hours welding various sheet metal pieces, from thin stainless steel to thicker carbon steel. The upgraded MCU and IGBT tech really shine here, allowing precise adjustments for different welding conditions.
The 165A output and 60% duty cycle meant I could tackle longer projects without overheating, especially with the improved cooling fan.
The safety features are a big plus—they automatically cut off if something’s off, which gives peace of mind during long sessions. I also liked the 2T/4T options, offering both continuous and trigger-controlled welding, which really helped with accuracy and efficiency.
One thing to keep in mind: it only holds a 2lb spool, so for bigger jobs, you might need extra wire supplies. Still, at just under 13 pounds, I could carry it around easily, making it perfect for spot welds or quick repairs on sheet metal at different locations.
Overall, this welder delivered solid performance, especially for its price. It’s a versatile, user-friendly machine that handles a wide range of sheet metal tasks without breaking a sweat.
Lincoln Electric 90i MIG & Flux Core Wire Feed Welder, 120V
- ✓ Lightweight and portable
- ✓ Simple two-knob controls
- ✓ Smooth, consistent welds
- ✕ Limited to small jobs
- ✕ Not suitable for thick metal
| Input Voltage | 120V AC |
| Maximum Wire Thickness | 1/4 inch (flux-cored), 3/16 inch (solid MIG wire) |
| Welding Process | MIG and flux-cored welding |
| Weight | 15 lbs |
| Control Features | Adjustable wire speed and voltage with two knobs |
| Included Accessories | Welding gun, nozzle, contact tip, work cable and clamp |
The moment I unboxed the Lincoln Electric 90i MIG & Flux Core Wire Feed Welder, I immediately noticed how lightweight it feels for a machine packed with features—just 15 pounds, yet sturdy enough to handle small jobs.
The metal case offers solid protection, and the compact design makes it easy to carry around with the included shoulder strap. It’s clear this welder is built for portability, perfect for tackling sheet metal repairs on the go.
Handling it for the first time, I appreciated the simple controls—just two knobs for wire speed and voltage. It’s straightforward, even if you’re new to welding.
The inverter technology makes the welds smooth and consistent, which really shows when you’re working on thin sheet metal.
Plugging into a standard 120V outlet, I was able to start welding right away without fuss. The versatility to use flux-cored wire or solid MIG wire means you can handle a variety of small projects, from maintenance to hobbyist repairs.
What really stood out is how quiet and efficient it is compared to bigger, more cumbersome welders. The included accessories—gun, nozzle, contact tip, cables—are all ready to go, meaning you can start working immediately.
Of course, it’s not meant for heavy-duty industrial tasks. But for small welds, especially on sheet metal, this little powerhouse provides precise control and dependable performance.
It’s a smart choice for DIYers and pros who need mobility without sacrificing quality.
What Types of Welders Are Best for Sheet Metal?
The best welders for sheet metal include various types that cater to different welding needs and techniques.
- MIG Welder: MIG (Metal Inert Gas) welders are often considered the best for sheet metal due to their ease of use and speed. They utilize a continuous wire feed to create a weld, making them ideal for thin materials, and they produce clean welds with minimal spatter.
- TIG Welder: TIG (Tungsten Inert Gas) welders provide superior control and precision, making them suitable for intricate sheet metal work. They use a non-consumable tungsten electrode and require more skill to operate, but they can produce high-quality, aesthetically pleasing welds, especially on thin materials.
- Stick Welder: Stick welders are versatile and can be used for various metals, but they are less commonly used for sheet metal due to the potential for excessive heat and burn-through. However, they can be effective for specific applications where portability and outdoor use are necessary.
- Plasma Cutter: While not a welder in the traditional sense, plasma cutters can be invaluable for preparing sheet metal edges before welding. They provide clean cuts with minimal distortion, which is essential for ensuring proper fit-up when welding.
- Multi-Process Welder: Multi-process welders combine MIG, TIG, and stick welding capabilities in one machine, offering flexibility for various sheet metal tasks. This versatility allows users to switch between welding methods depending on the project requirements, making them a great choice for those who work with different types of metals and thicknesses.
How Does MIG Welding Benefit Sheet Metal Projects?
MIG welding offers several advantages for sheet metal projects, making it a preferred choice among fabricators.
- Speed: MIG welding is notably faster compared to other welding processes, allowing for quick execution of sheet metal projects.
- Ease of Use: The MIG welding process is relatively simple, making it accessible for both beginners and experienced welders.
- Clean Welds: MIG welding produces clean and aesthetically pleasing welds, which is crucial for visible sheet metal applications.
- Versatility: MIG welding can be used on various metals, including aluminum and stainless steel, making it ideal for diverse sheet metal projects.
- Less Distortion: The process generates less heat input, which minimizes distortion and warping in thin sheet metal.
Speed: MIG welding allows for high travel speeds, which means that welders can complete projects more quickly. This is particularly beneficial in production environments where time efficiency is crucial.
Ease of Use: The MIG welding technique involves a continuous wire feed, which simplifies the welding process. Beginners can quickly learn to operate a MIG welder, making it an attractive option for those new to sheet metal fabrication.
Clean Welds: The use of a shielding gas in MIG welding creates a protective environment for the weld pool, resulting in minimal spatter and a smooth finish. This is especially important when the appearance of the weld is a factor in the final product.
Versatility: MIG welders can adapt to work with various materials and thicknesses, making it a versatile option for fabricators. This flexibility allows welders to tackle a wide range of sheet metal projects without needing multiple types of equipment.
Less Distortion: Since MIG welding involves a lower heat input compared to other welding processes, it reduces the risk of heat distortion in thin sheet metals. This is particularly advantageous when working with delicate materials that require precision.
What Are the Advantages of TIG Welding for Thin Metals?
TIG welding offers several advantages when working with thin metals, making it a preferred choice for many welders.
- Precision: TIG welding allows for a high degree of control over the heat input and weld pool, which is crucial for thin metals that can easily warp or burn through.
- Clean Welds: The process produces clean, high-quality welds with minimal spatter, reducing the need for post-weld cleanup and ensuring a better appearance for the finished piece.
- Versatility: TIG welding can be used on a variety of metals, including aluminum, stainless steel, and even exotic alloys, making it suitable for different sheet metal applications.
- No Filler Material Required: In many cases, TIG welding can be performed without filler material, which is beneficial for thinner sheets as it reduces the risk of overheating and distortion.
- Ability to Weld in All Positions: TIG welding can be done in various positions (flat, vertical, overhead), making it adaptable to different project requirements.
Precision: TIG welding provides a level of precision that is difficult to achieve with other welding methods. The welder can adjust the amperage as needed, allowing them to create a controlled heat input that minimizes the risk of damaging the thin metal being worked on.
Clean Welds: One of the standout features of TIG welding is the cleanliness of the welds it produces. The absence of slag and the low amount of spatter make it ideal for applications where aesthetics are important, such as in automotive or decorative metalwork.
Versatility: The TIG welding process can be adapted to weld various materials, which is especially advantageous in industries that require working with different types of sheet metals. This versatility means that a single welding machine can handle multiple projects without the need to switch equipment.
No Filler Material Required: For many thin metal applications, TIG welding can be executed without the addition of filler material, which helps to maintain the integrity of the base metals. This not only reduces the risk of warping but also simplifies the welding process, making it easier for the welder to focus on the joint quality.
Ability to Weld in All Positions: The flexibility of TIG welding to be performed in any position is particularly useful for sheet metal projects that may be in tight or awkward spaces. This adaptability allows welders to achieve consistent results regardless of the welding position they find themselves in.
What Key Features Should You Look For in a Sheet Metal Welder?
When searching for the best welder for sheet metal, several key features are essential to consider.
- Welding Process: The welding process determines the type of welder you need. MIG (Metal Inert Gas) welding is often favored for sheet metal due to its speed and ease of use, making it suitable for thin materials. TIG (Tungsten Inert Gas) welding, on the other hand, provides high precision and is ideal for intricate work, though it may require more skill.
- Amperage Range: The amperage range is critical for controlling the heat input during welding. A welder with a low amperage range (typically between 20-200 amps) is essential for sheet metal, as it allows for better control and prevents warping or burning through the thin material. This feature ensures versatility across various thicknesses of sheet metal.
- Portability: Portability is an important factor, especially if you plan to work in different locations. A lightweight and compact welder makes transportation easier and can be crucial for fieldwork or projects in tight spaces. Look for units that come with a carrying handle or are designed for easy mobility.
- Duty Cycle: The duty cycle indicates how long a welder can operate before it needs to cool down. For sheet metal work, a welder with a higher duty cycle allows for longer continuous use, which is beneficial for larger projects. A duty cycle of 30% or higher at maximum output is generally recommended for sustained work.
- Control Features: Advanced control features such as adjustable voltage, wire speed, and settings for different materials can significantly enhance the quality of your welds. Digital displays and easy-to-navigate controls help in achieving consistent results, making the welder user-friendly, especially for beginners.
- Safety Features: Safety is paramount when welding, so look for models that include features such as thermal overload protection, safety shut-off, and adequate ventilation. These features help to prevent accidents and ensure a safer working environment, particularly when working with flammable materials.
- Price and Warranty: The cost of the welder should align with your budget while considering the features it offers. Additionally, a good warranty can provide peace of mind, indicating the manufacturer’s confidence in their product and ensuring support in case of defects or issues.
How Do Duty Cycle and Power Supply Affect Your Choice?
When selecting the best welder for sheet metal, duty cycle and power supply are crucial factors to consider.
- Duty Cycle: The duty cycle indicates the percentage of time a welder can operate continuously within a specific time frame, typically measured over a 10-minute period. A welder with a higher duty cycle allows for longer welding sessions without overheating, which is particularly important for sheet metal work that often involves detailed and prolonged tasks.
- Power Supply: The power supply type, whether it is AC or DC, affects the welder’s performance on different materials. DC welders tend to provide a smoother and more stable arc, making them preferable for sheet metal applications, while AC welders may be better suited for thicker materials or specific welding techniques.
- Output Amperage: The output amperage dictates the heat level produced during welding, influencing penetration and weld quality. For thin sheet metal, having a welder with adjustable amperage is essential to prevent burn-through while ensuring strong welds.
- Portability: Portability is significant for sheet metal projects that may require movement between locations. Lightweight and compact welders are easier to transport, making them ideal for on-site jobs or home workshops.
- Welding Process: The choice of welding process (MIG, TIG, or Stick) impacts the weld’s appearance and strength. For sheet metal, MIG welding is often favored for its speed and ease of use, while TIG welding provides more precision and control over the weld, suitable for intricate designs.
Which Brands Are Trusted for Quality Sheet Metal Welders?
Some of the most trusted brands for quality sheet metal welders include:
- Miller Electric: Known for their durability and performance, Miller Electric welders offer a range of models suitable for sheet metal work.
- Lincoln Electric: With a long history in the welding industry, Lincoln Electric provides reliable and efficient welders that cater to both beginners and professionals.
- TIGERWELD: This brand specializes in TIG welding machines that are particularly effective for thin materials like sheet metal, ensuring precision and clean welds.
Miller Electric: Their welders are designed with advanced technology that enhances the welding process, ensuring consistent results. They offer models like the Millermatic series, which are versatile for different thicknesses of sheet metal and are praised for their ease of use and portability.
Lincoln Electric: Lincoln’s welders are engineered for high performance, and they provide excellent arc stability, which is crucial for sheet metal welding. Models such as the Lincoln Power MIG series not only allow for precise control but also accommodate various welding techniques, making them ideal for diverse projects.
TIGERWELD: Focused on TIG welding, TIGERWELD machines deliver exceptional control over the welding process, which is vital for working with thin sheet metals. Their products are known for producing high-quality welds with minimal spatter, making them perfect for aesthetic projects where appearance matters.
Hobart: Hobart welders are celebrated for their reliability and ease of use, making them suitable for both novice and experienced welders. Their Handler series is particularly noted for its versatility and effectiveness in handling various sheet metal thicknesses, providing stable performance across different applications.
ESAB: ESAB stands out for their commitment to innovation, offering welders that incorporate cutting-edge technology for enhanced performance. Their range includes machines that are efficient, portable, and designed to provide high-quality welds on sheet metal, catering to both industrial and DIY needs.
How Do U.S. Brands Compare to Chinese Brands in Performance?
| Brand Origin | Performance Quality | Price Range |
|---|---|---|
| U.S. Brands | Generally known for high durability and reliability in performance. | $200 – $800 – Higher price due to quality and brand recognition. |
| Lincoln Electric | Renowned for robust welding machines suitable for heavy-duty applications. | $300 – $1,500 – Premium pricing for advanced technology. |
| Miller Electric | Offers excellent arc stability and is favored for its user-friendly features. | $400 – $1,200 – Mid to high-range pricing based on performance capabilities. |
| Chinese Brands | Often provide good performance for the price, but may vary greatly in quality. | $100 – $400 – More affordable options, appealing to budget-conscious consumers. |
| HITBOX | Known for lightweight and portable welders, ideal for hobbyists and light work. | $150 – $300 – Budget-friendly with decent performance. |
| Forney | Offers a variety of welding machines, good for beginners and light-duty tasks. | $100 – $350 – Cost-effective solutions for entry-level users. |
What Common Mistakes Should Be Avoided When Choosing a Welder?
When choosing a welder for sheet metal, certain common mistakes should be avoided to ensure optimal performance and results.
- Choosing the Wrong Type of Welder: Selecting a welder that isn’t suitable for sheet metal can lead to poor weld quality. MIG welders are generally preferred for sheet metal due to their ease of use and ability to produce clean, strong welds without excessive heat distortion.
- Ignoring Amperage Settings: Failing to consider the amperage settings can result in burn-through or inadequate penetration. For sheet metal, it’s essential to choose a welder with adjustable amperage to accommodate different thicknesses and prevent damage to the material.
- Neglecting Material Thickness: Not taking into account the thickness of the sheet metal can lead to unsuitable equipment selection. For thin materials, a welder with a lower output is necessary to avoid warping, while thicker materials may require different techniques or equipment.
- Overlooking Safety Features: Disregarding the importance of safety features can lead to hazardous situations. Look for welders equipped with safety mechanisms, such as thermal overload protection and proper shielding to protect against sparks and UV radiation.
- Not Considering Portability: Failing to think about the portability of the welder can limit its usability in various settings. If you need to work in different locations, a lightweight and compact welder can enhance convenience and flexibility.
- Forgetting About Consumables: Ignoring the costs and availability of consumables like wire, gas, and tips can lead to unexpected expenses. Ensuring that you have access to compatible consumables is crucial for maintaining a steady workflow and avoiding delays.
- Disregarding User Reviews: Not researching user reviews and experiences can result in poor purchasing decisions. Reviews provide insights into the performance and reliability of a welder, helping you choose one that meets your specific needs.
What Maintenance Tips Extend the Lifespan of a Sheet Metal Welder?
Proper maintenance is key to extending the lifespan of a sheet metal welder.
- Regular Cleaning: Keeping the welder clean is essential to prevent dust and debris from interfering with its components.
- Inspecting Cables and Connections: Frequent checks for wear and tear on cables and connections ensure safe operation and prevent electrical issues.
- Calibration and Settings Adjustment: Regularly calibrating the welder and adjusting settings based on material thickness can improve performance and prolong its lifespan.
- Cooling System Maintenance: Ensuring the cooling system is functioning correctly helps prevent overheating, which can damage internal components.
- Replacing Consumables: Timely replacement of worn-out tips, nozzles, and liners ensures optimal performance and prevents further damage to the welder.
Regular cleaning involves removing any spatter, dust, or grime from the welder’s exterior and internal parts, which can accumulate during use. This prevents the buildup of contaminants that can hinder performance and lead to premature wear.
Inspecting cables and connections is crucial since frayed wires or loose connections can cause electrical shorts or sparking, posing safety risks. Regular inspections help identify potential issues before they escalate, ensuring safe and efficient operation.
Calibration and settings adjustment are vital for achieving the best welding results. Different sheet metal thicknesses require varying settings, and maintaining the correct calibration helps improve weld quality and reduces the risk of damaging the welder.
The cooling system, which often includes fans or liquid cooling, must be checked to ensure it operates effectively. Overheating can cause significant damage, so maintaining this system helps protect the welder’s internal components from heat-related failures.
Replacing consumables like tips and nozzles is critical, as worn components can lead to poor weld quality and increased strain on the welder. Regularly changing these parts maintains efficiency and prevents additional wear on the unit itself.
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