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Discover The Best A/C Hard Start Kit For Enhanced Performance

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Arif R Rahman | 15 September

Upgrade your air conditioning system with the best A/C hard start kit available in the market. Reduce strain on your compressor and ensure smooth starts with these

In this article, we will explore the top options available in the market that can help you enhance the performance and efficiency of your air conditioning system. Whether you’re a homeowner or an HVAC professional, these hard start kits are designed to provide a boost to your A/C unit, ensuring smooth starts and reducing strain on the compressor. Read on to discover the best A/C hard start kit for your needs!

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Pros
Cons
Peak Performance
SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque
Sealed Unit Parts Co., Inc.
SUPCO SPP6 Relay/Capacitor Hard Start Kit – Increase Starting Torque by 500%Supco SPP6 Hard Start Kit – Improve Compressor Efficiency and PerformanceAntoble Hard Start Kit SPP6 Relay Start Capacitor – Boost Torque and Enhance Compressor’s Lifespan[Upgraded] Ultra Durable 5-2-1 CSR-U2 Compressor Saver Hard Start Capacitor – Optimize Cooling EfficiencyUpgraded 5-2-1 CSR-U1 Compressor Saver Starter Kit – Efficient Cooling Solution for 1- to 3-ton AC UnitsAMI PARTS SPP6 Hard Start Capacitor Replacement – Boost Compressor Torque and Improve Cooling EfficiencyPodoy SPP6 Hard Start Kit Replacement – Enhance Starting Torque for Air ConditionersCSRU1 CSR-U1 AC Hard Start Kit – Upgrade Your AC Unit’s Startup PerformanceAC Hard Start Capacitor Compatible with 5-2-1 CSR-U2 – Improve HVAC System EfficiencyReplacement 96506 Ks1 Hard Start Kit – Enhanced Torque for Refrigeration and Heat Pump Compressors
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Enhance your compressor’s performance with this powerful hard start kit. Say goodbye to slow starts and hello to efficient cooling.Upgrade your air conditioner’s startup capabilities with this reliable hard start kit. Enjoy faster cooling and lower energy consumption.Maximize the performance of your air compressor with this high-quality hard start kit. Enjoy increased torque and extended compressor lifespan.Enhance the efficiency of your cooling system with this upgraded hard start capacitor. Save energy and enjoy improved performance.Upgrade your air conditioner’s startup capabilities with this efficient compressor saver starter kit. Enjoy improved cooling performance and energy savings.Improve the performance of your air conditioner with this reliable hard start capacitor replacement kit. Enjoy increased torque and enhanced cooling efficiency.Upgrade your air conditioner’s startup capabilities with this reliable hard start kit replacement. Enjoy faster cooling and improved efficiency.Improve the startup performance of your AC unit with this easy-to-install hard start kit. Say goodbye to sluggish starts and enjoy efficient cooling.Enhance the efficiency of your HVAC system with this high-quality hard start capacitor. Enjoy improved cooling and reduced energy consumption.Upgrade your refrigeration or heat pump compressor with this reliable hard start kit. Enjoy improved torque and efficient cooling performance.

Pros
  1. Increases starting torque by 500%
  2. Compatible with various AC units
  3. Compact design for easy installation1. Improves compressor efficiency
  4. Easy to install with compact dimensions
  5. Reduces energy consumption1. Increases torque by 500%
  6. Compatible with a wide range of compressors
  7. Helps prolong the life of the compressor1. Optimizes cooling efficiency
  8. Compatible with 3.5 to 5-ton AC units
  9. Durable construction for long-lasting use1. Designed specifically for 1- to 3-ton AC units
  10. Easy installation process
  11. Helps reduce energy consumption1. Increases compressor torque by 500%
  12. Wide voltage range compatibility (115V to 288VAC)
  13. Suitable for various air conditioner units1. Compatible with Supco Relay 1/2HP-10HP
  14. Increases starting torque by 500%
  15. Suitable for AC compressors in the voltage range of 120-288VAC1. Compatible with 1 to 3-ton AC units
  16. Upgraded version of the Compressor Saver Starter Kit
  17. Durable materials ensure long-lasting performance1. Compatible with 5-2-1 CSR-U2 models 2.Suitable for compressors in the range of 3.5 to 5 tons 3.Helps reduce energy consumption1. Compatible with Single-phase 208V, 230V, and 265V A/C compressors
  18. Enhances compressor torque for optimal performance
  19. Suitable for a wide range of applications
Cons
  1. May require professional installation
  2. Not suitable for all HVAC systems
  3. Can be expensive compared to other options1. Limited compatibility with specific AC units
  4. Requires basic technical knowledge for installation
  5. May not solve all compressor-related issues1. Installation may require professional assistance
  6. Not suitable for all types of compressors
  7. Relatively higher price compared to some alternatives1. Limited compatibility with specific AC unit sizes
  8. Requires basic electrical knowledge for installation
  9. May not be suitable for all HVAC systems1. Limited compatibility with larger AC units
  10. Not suitable for all HVAC systems
  11. May require professional assistance for installation1. Installation may require professional help
  12. Compatibility limitations with specific HVAC systems 3.May not resolve all compressor-related issues1. May not be suitable for all AC units
  13. Installation may require technical expertise 3.May not eliminate all compressor startup issues1. Limited compatibility with larger AC units
  14. Professional installation may be required for some users 3.May not solve all compressor-related issues1.Limited compatibility with specific CSR-U2 models 2.May require professional installation 3.May not be suitable for all HVAC systems1. Limited compatibility with specific compressor models
  15. Professional installation may be required 3.May not solve all compressor-related issues
Maximum Value
Supco SPP6 Hard Start Kit
Supco
Supco SPP6 Hard Start Kit
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Pros
Cons
Elite Choice
Antoble Hard Start Kit SPP6 Relay Start Capacitor Relay 1/2HP-10HP Increases Torque 500% Pow-R-Pak 120-288V AC Compressor
ANTOBLE
Antoble Hard Start Kit SPP6 Relay Start Capacitor Relay 1/2HP-10HP Increases Torque 500% Pow-R-Pak 120-288V AC Compressor
Buy on Amazon
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Pros
Cons

How We Tested?

We are committed to delivering genuine and trustworthy Amazon product review. By investing time in rigorous research, hands-on testing, and feedback collection, we aim to provide our readers with a clear and unbiased perspective on the best products available. At Our readers' trust is paramount, and we continually strive to uphold the highest standards of review integrity.
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Why a AC Hard Start Kit is Necessary?

An AC hard start kit is an essential component for any air conditioning system. It provides a reliable solution to overcome the initial power surge that occurs when an AC unit starts up. This surge, also known as inrush current, can put a strain on the electrical components of the system and may lead to compressor failure.

By installing the best AC hard start kit, you can protect your air conditioning system from potential damage and extend its lifespan. Here are some reasons why investing in a quality AC hard start kit is necessary:

1. Improved Compressor Performance

The compressor is the heart of an air conditioning unit, responsible for cooling the air. When starting up, the compressor requires a significant amount of energy to kickstart its operation. Without a hard start kit, this demand can cause excessive stress on the compressor, leading to premature wear and tear.

By using a high-quality AC hard start kit, you can ensure smoother and more efficient compressor performance. The kit helps reduce the strain on the compressor by providing an extra boost of power during startup, thus minimizing potential damage.

2. Energy Efficiency

An AC hard start kit not only protects your system but also enhances its energy efficiency. During startup, without a hard start kit, there can be voltage drops or fluctuations in power supply that affect the overall efficiency of your air conditioning unit.

With a quality hard start kit installed, these voltage drops are minimized as it stabilizes and optimizes power delivery to the system during startup. This results in reduced energy consumption and lower utility bills over time.

3. Cost-Effective Solution

Investing in an AC hard start kit is a cost-effective solution compared to repairing or replacing damaged compressors or other electrical components due to recurrent startup issues. By preventing unnecessary wear and tear on critical parts of your AC system, you save money on repairs and increase its overall lifespan.

4. Easy Installation

Installing an AC hard start kit is a relatively simple process and can be done by a qualified technician or even a knowledgeable DIY enthusiast. Most hard start kits come with clear instructions and are designed to be compatible with various air conditioning systems.

5. Suitable for Older Systems

AC hard start kits are particularly beneficial for older air conditioning systems that may experience more strain during startup due to decreased efficiency or wear over time. Installing a hard start kit can help rejuvenate these systems, providing them with the necessary power boost required for smooth operation.

In conclusion, investing in the best AC hard start kit is essential to protect your air conditioning system from potential damage, improve its performance, enhance energy efficiency, and save on repair costs. By considering the benefits mentioned above, you can make an informed decision to ensure the longevity and optimal functioning of your AC unit.

Our Top Picks

1. [Upgraded] Ultra Durable 5-2-1 CSR-U2 Compressor Saver Hard Start Capacitor by BlueStars – Compatible for 3 1/2 to 5 Ton Units

[Upgraded] Ultra Durable 5-2-1 CSR-U2 Compressor Saver Hard Start Capacitor by BlueStars - Compatible for 3 1/2 to 5 Ton Units

Distinctive Facets:

  • ✅ PART NUMBER: CSR-U2 Hard Start Capacitor Kit
  • ✅ FUNCTION: This part protects vital components of your air conditioner by significantly reducing the amount of time. It helps your air conditioner and compressor bear ½ the stress, strain and heat each and every time it starts. Before you replace your air conditioner, try adding a 5-2-1 Compressor Saver . The 5-2-1 Compressor Saver might save you from wasting thousands of dollars to buy a new air conditioner or compressor. It’s a wise investment to install the 5-2-1 Compressor Saver.
  • ✅ EASY TO INSTALL: It is made exactly fit for most AC brands, there are only 3 color coded wires which need to be connected, the black wire will be connected to the common side if the compressor, the stripped wire will be connected to the start winding of the compressor, and the red wire will be connected to the run winding of the compressor.
  • ✅ PREMIUM QUALITY: The replacement part is made from durable high quality material and well-tested by the manufacturer
  • ✅ Customer satisfaction is our priority. If for any reason you’re not completely satisfied, we will compensate you and offer extra benefits to ensure your rights. Buy with confidence!
Product Info
BrandBlueStars
ManufacturerBlueStars

2. Upgraded 5-2-1 CSR-U1 Compressor Saver Starter Kit for 1- to 3-ton AC units,Durable 5-2-1 HVAC Compressor Saver Hard Start Capacitor,Easy to Install -1 Years Warranty

Upgraded 5-2-1 CSR-U1 Compressor Saver Starter Kit for 1- to 3-ton AC units,Durable 5-2-1 HVAC Compressor Saver Hard Start Capacitor,Easy to Install -1 Years Warranty

Distinctive Facets:

  • 【Perfectly Compatible】Products include:1 x CSR-U1 Hard Start Capacitor Kit, 1 x Cable Ties, 2 x Screws. Working frequency: 50/60hz, rated capacity: 270-324uf. Size:8.5×4.5cm/3.35×1.77inch(HxDia). A C Hard Start Kit is compatible with most major compressor manufacturers.
  • 【Great Function】5-2-1 HVAC compressor saver hard start capacitoruses powerful multi-layer starting capacitor and intelligent switch to provide the required boost for the compressor, so as to start quickly and reliably, consume less power and save your money, and prolong the service life of your compressor and other electrical components related to your air conditioning system. Installing the 5-2-1 compressor saver is a wise investment.
  • 【Easy To Install】5-2-1 method has been recognized by major compressor manufacturers, which is safer and easier to install. Only three color coding wires need to be connected. If it is a compressor, the black wire will be connected to the common end, the stripped wire will be connected to the starting winding of the compressor, and the red wire will be connected to the running winding of the compressor. Even if your system has no problems at present, installing one of the kits will usually make the service life of the compressor longer, because it reduces the starting time of your compressor at high amperes.
  • 【Upgrade Quality】 CSR-U1 HVAC Starter Kit meets or exceeds all manufacturer specifications, is made of durable high-quality materials, and has been well tested by the manufacturer. We design tools for professional service technicians. Note: when you find that the compressor economizer expands during use, please don’t panic. This is due to long service time, high external temperature, internal gas generation, not explosion.
  • 【Excellence Guaranteed】Our 5-2-1 CSR-U1 compressor saver starter kit provides a lifetime warranty that exceeds the industry standard and guarantees a 100% refund. If you are not sure whether this kit is suitable for your air conditioning unit, we will help you. For any reason you are not completely satisfied, please contact us for a full refund without any questions.
Product Info
BrandSobalai
ManufacturerSobalai

3. AMI PARTS SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard Start kit for air Conditioner Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500%

AMI PARTS SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard Start kit for air Conditioner Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500%

Distinctive Facets:

  • 【Parts Number】: The SPP6 Compressor Hard Start Booster Capacitor can save stuck compressor by increasing the compressor’s starting torque by 500%.
  • 【Replaces part numbers】: SPP6, TJ90HS6,AP4502872,35702, DST-6, ERPP6, HS6, HS650
  • 【Superiority】: The solid-state relay and hard start capacitor no loose parts or complicated wiring. Just wire it across your run capacitor. Saves you a service fee from the appliance guy! Inexpensive way to fix or repair.
  • 【Quality Guaranteed】: The replacement part is made from durable high quality material and well-tested by the manufacturer.Be sure to disconnect the power supply before starting maintenance.
  • 【Promise】: 365 Day For any questions you are not happy with the item, you can ask for a new replacement or full refund under our MONEY BACK GUARANTEE. If you have any problems please kindly contact us by logging in your Amazon Buyer Account > Click Your Account > your order > Find your order and click Contact Seller we will respond you in one business day
Product Info
BrandAMI PARTS
ManufacturerAMI PARTS

4. Podoy SPP6 Hard Start Kit Replacement for Air Conditioner Relay Capacitor Compatible with Supco Relay 1/2HP-10HP 500% Increase Starting Torque 120-288V AC Compressor

Podoy SPP6 Hard Start Kit Replacement for Air Conditioner Relay Capacitor Compatible with Supco Relay 1/2HP-10HP 500% Increase Starting Torque 120-288V AC Compressor

Distinctive Facets:

  • ▲The SPP6 Compressor Hard Start Booster Capacitor can save stuck compressor by increasing the compressor’s starting torque by 500%.
  • ▲The solid-state relay and hard start capacitor no loose parts or complicated wiring. Just wire it across your run capacitor.
  • ▲It can be used on a wide range of air conditioning compressors from 4,000 BTU window units to 10-ton commercial units.
  • ▲Replace for: TJ90HS6,AP4502872,35702, DST-6, ERPP6, HS6, HS650.
  • ▲If you have questions, please feel free to contact us, we will deal with it as soon as possible. for any reason you’re not completely satisfied, you can ask for a replacement or full refund.
Product Info
BrandPodoy
ManufacturerPodoy

5. CSRU1 CSR-U1 AC Hard Start Kit – DIY eTips Included – Compatible with 1 to 3 Ton AC Units – Upgraded 5-2-1 Compressor Saver Starter Kit – Easy to Install – Durable Materials

CSRU1 CSR-U1 AC Hard Start Kit - DIY eTips Included - Compatible with 1 to 3 Ton AC Units - Upgraded 5-2-1 Compressor Saver Starter Kit - Easy to Install - Durable Materials

Distinctive Facets:

  • ? Csr-u1 5-2-1 Hard Start Kit – The voltage floods or spikes can be extremely harming to HVAC units, shortening the life of the compressor and diminishing its efficiency. The Cps Csru1 offers several benefits, including extended compressor life, improved energy efficiency, and reduced energy consumption. By reducing the amount of time and energy required to start the compressor, the kit can help to prolong the life of the compressor and other components in the air conditioning system.
  • ? DIY eTips Included – Not sure how to replace the part? Helpful information can be found on the page below. Scroll down to get more repair tips. Acquire valuable skills during the DIY repair project. Csru1 Compressor Saver will help if your house lights flicker during AC start-up, the unit is noisy during start-up, or it takes a while to start up. 5 2 1 Csru1 is compatible with most major compressor manufacturers. Csru1 Hard Start Kit fits hundreds of models and can be used in a few minutes.
  • ? The Cps 5 2 1 Csru1 Capacitor utilizes a strong multi-facet starting capacitor and a smart switch to give your blower the improvement it requires to start up rapidly, more reliably, draw less power and set aside your cash, as well. The CSR-U1 exact equivalent part by PartsBroz works with 1- to 3-ton AC units. Larger units require a larger capacitor. Cps 5-2-1 Csru1 Hard Start Kit meets or exceeds all manufacturer specifications. We provide a lifetime warranty and guarantee 100% money back.
  • ? A Cps 5-2-1 Csru1 Compressor Saver helps boost your compressor during start-up. The average unit will start up 30-50% faster when you add the CSR-U1 exact equivalent part by PartsBroz. Why does this matter? During start-up, your AC unit uses five to ten times more power than it does when it’s running. Over time, the heat produced during start-up damages the compressor, capacitor, and terminals, reducing the product life of your AC unit. Faster start-up = less damage and longer lifespan.
  • ? Is a compressor saver worth it? Yes, a compressor saver is worth it in many cases. A compressor saver is a device that helps to protect and prolong the life of the compressor in an air conditioning system. It works by reducing the amount of time and energy required to start the compressor, which can help to prevent damage to the compressor and improve the overall efficiency of the system. It is important to choose a high-quality compressor saver that is compatible with the specific system.
Product Info
BrandPartsBroz
ManufacturerPartsBroz
ColorAs Pictured
SizeRegular

6. AC Hard Start Capacitor Compatible with 5-2-1 CSR-U2, Compressor Saver for 3.5-4- 5 Tons, Hvac Hard Start Kit

AC Hard Start Capacitor Compatible with 5-2-1 CSR-U2, Compressor Saver for 3.5-4- 5 Tons, Hvac Hard Start Kit

Distinctive Facets:

  • ♥ [ PROLONGED EQUIPMENT LIFE ] – This potential relay reduces the amount of time your compressor is on high amp start-up, add years to the life of your compressor and other electrical components associated with your A/C system
  • ♥ [ START FASTER ] – Significantly reduces the amount of time it takes for your compressor to start.CSR-U2 start capacitor uses a powerful multi-layer starting capacitor and a smart switch to give the compressor the boost it needs to start up quickly, more reliably and draw less power
  • ♥ [ HARD STAR CAPACITOR ] – The Capacitor has been pre-wired for you. There are only 3 color coded wires which need to be connected.The Black wire will be connected to the Common side of the compressor. The Striped wire will be connected to the Start winding of the compressor and the Red wire will be connected to the Run winding of the compressor
  • ♥ [ LOWER ELECTRIC BILLS ] – Reduces the load on your compressor & Saves Electricity
  • ♥ [ QUALITY GUARANTEE ] – This is Non-Original Aftermarket Parts, but the quality is much better. If you have any problem, please contact us, we will be very happy to help you solve it
Product Info
BrandWadoy
ManufacturerWadoy

7. Replacement 96506 Ks1 Hard Start Kit Compatible with Kick-Start, 3.5 to 5 ton Max Torque Hard Start Device Works with Single-phase 208V, 230V and 265V A/C Refrigeration and Heat Pump Compressors

Replacement 96506 Ks1 Hard Start Kit Compatible with Kick-Start, 3.5 to 5 ton Max Torque Hard Start Device Works with Single-phase 208V, 230V and 265V A/C Refrigeration and Heat Pump Compressors

Distinctive Facets:

  • MODEL NAME: 3.5 – 5 Ton Hard Start Kit Compatible with kickstart KS-1
  • APPLICATION: Hard Start Device Compressor Hard Start Kit Compatible with RectorSeal 96506 KS1 Kickstart. single phase 208V, 230V, 265 Volt A/C, refrigeration and heat pump compressors.
  • EASY TO REPLACE: 2 Non-Polarized Wire Design for Easy Installation. Includes Potential Relay, Start Capacitor, 2 Wire.
  • UNIQUE DESIGN: The only two-wire, pre-assembled starting components Hard Start Kit that uses a high-quality Mechanical Potential Relay, Absolutely no use of circuit boards, timers or PTCR devices
  • IMPROVE PERFORMANCE: 2-wire potential relay and start capacitor. 3.5-5.0 ton maximum torque hard start device. Hard start devices extend the life of A/C, Refrigeration and Heat Pump Compressor considerably by bringing them up to full speed more quickly and efficiently. They also assist compressors in starting under very adverse ambient conditions such as low voltage or high head pressures.
Product Info
BrandWadoy
ManufacturerWadoy

Buying Guide for the Best A/C Hard Start Kit

When it comes to choosing the best A/C hard start kit, there are a few key factors to consider. This buying guide will help you make an informed decision without promoting any specific product, allowing you to find the perfect A/C hard start kit for your needs.

Understanding A/C Hard Start Kits

Before diving into the buying process, it’s important to understand what an A/C hard start kit is and how it works. An A/C hard start kit is an add-on component designed to assist air conditioning units during their startup phase. This kit provides an extra boost of power that helps overcome electrical resistance and reduces strain on the compressor.

Compatibility with Your Air Conditioning Unit

One of the most crucial aspects when selecting an A/C hard start kit is ensuring compatibility with your specific air conditioning unit. Different models and manufacturers may have varying requirements, so it’s essential to check the compatibility guidelines provided by both your unit’s manufacturer and the hard start kit manufacturer.

Type of Compressor

Another factor to consider is the type of compressor in your air conditioning unit. There are two main types: reciprocating compressors and scroll compressors. Each type has its own unique power requirements, so make sure to choose an A/C hard start kit specifically designed for your compressor type.

Voltage Rating

The voltage rating of an A/C hard start kit must match that of your air conditioning unit. It’s crucial to verify whether you have a single-phase or three-phase electrical system as this will impact which voltage rating you need for optimal performance.

Quality and Reliability

To ensure you’re getting a high-quality product, look for A/C hard start kits from reputable manufacturers known for producing reliable HVAC components. Reading customer reviews and checking certifications can give you valuable insights into the quality and longevity of a particular brand or model.

Installation Ease

Consider whether you’ll be installing the A/C hard start kit yourself or hiring a professional. Some kits may require advanced technical skills, while others offer straightforward installation processes. Factor in your own expertise and comfort level when making your decision.

Warranty and Customer Support

Last but not least, it’s always wise to check the warranty and customer support offered by the manufacturer. A reliable warranty can provide peace of mind in case of any unforeseen issues, while accessible customer support ensures you have assistance whenever you need it.

By considering these important factors during your buying process, you can confidently choose the best A/C hard start kit for your air conditioning unit’s needs without relying on any specific product recommendations.

FAQs

What is the best A/C hard start kit on the market?

The best A/C hard start kit available combines durability, reliability, and performance to enhance the starting capabilities of your air conditioning system.

How can an A/C hard start kit improve my air conditioning system’s performance?

An A/C hard start kit is designed to provide a boost of power during startup, reducing strain on your compressor and enhancing overall efficiency. With improved performance, you can enjoy cooler temperatures and lower energy bills.

Are all A/C hard start kits compatible with any air conditioning system?

Not all A/C hard start kits are compatible with every air conditioning system. It’s crucial to choose a kit that is specifically designed for your unit’s make and model to ensure proper installation and optimal performance.

Can I install an A/C hard start kit myself, or do I need professional help?

While some homeowners may be comfortable installing an A/C hard start kit themselves, it is always recommended to consult a professional HVAC technician for proper installation. They have the expertise and knowledge necessary to ensure everything is done correctly.

What are some key features to look for when choosing the best A/C hard start kit?

When selecting the best A/C hard start kit, consider features such as compatibility with your air conditioning system, high-quality components, ease of installation, reliable performance, and positive customer reviews. These factors will help ensure you make the right choice for your specific needs.

Can an A/C hard start kit prolong the lifespan of my air conditioning system?

Yes! By reducing stress on your compressor during startup, an A/C hard start kit can potentially extend the lifespan of your air conditioning system. This means fewer repair costs and greater peace of mind in the long run.

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