5 Best HVAC Gauges – Handy, Durable and Accurate

Josh Mitchell

Written By

Josh Mitchell

Expert Reviewed By

Holly Curell

Last Updated On

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A manifold gauge is essential in your HVAC toolkit. However, choosing the best HVAC gauges can be difficult.

Clients, colleagues, and friends have all struggled, so I created this HVAC manifold gauge buyer’s guide to make it easier.

I researched, tried, and tested 41 HVAC manifold gauges and eventually narrowed it down to the 5 best quality and value units I'll introduce here.

Quick Glance - My Recommendations

Yellow Jacket 42004 Series 41 Manifold with...

Yellow Jacket 42004

Editor’s Choice

Testo - 0563 1557 testo 557 I Digital...

Testo 557 Digital Manifold Kit

Option for Larger Systems

Orion Motor Tech AC Gauge Set with Self...

OMT AC Gauge

Recommended Option for Cars

5 Top Rated Manifold Gauges for HVAC

The right equipment will provide more data to manage your HVAC systems more effectively. 

It can also save you valuable time.[1]

Whether you’re an HVAC professional managing complex systems or a DIYer working on your car’s AC system - keep reading to find the best HVAC gauges for the job.

1. Yellow Jacket 42004

4.8

Overall Score


Accuracy

5.0

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Usability

4.5

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Value for Money

5.0

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Who is the Yellow Jacket 42004 best for?

The Yellow Jacket 42004 is best for users of all experience levels working with residential or light-commercial settings.

Pros
  • Versatile and compatible with most HVAC systems
  • Durable construction (solid brass)
  • Easy to use (long hose length for easier placement)
  • More accurate than other analog gauges
  • Affordable - and great value!
CONS
  • No anti-blowback feature
  • Lack of advanced digital features

Yellow Jacket is one of the most reliable HVAC brands and my go-to for service tools.

The quality, versatility, and value of the Yellow Jacket 42004 make it useful in any setting and a stand-out HVAC gauge.           

Digital gauges are typically more accurate, but not with this equipment.

The analog gauge is as precise as they come, and during testing (on multiple systems), it never exceeded the 1% limit.

It's tough (built from durable brass) but lightweight and perfect for HVAC fieldwork. It may only have a 1-year warranty, but even under heavy use, I expect it to last far longer.

What I like most about this HVAC gauge is its compatibility and simplicity.

It works with multiple refrigerants and is compatible with a variety of systems.

It isn't quite as well suited for industrial HVAC systems as the Testo 557 but is suitable for domestic or commercial environments.

The simple analog design, large gauges, and straightforward controls make it easy to assess the pressure and perform routine maintenance.

Even beginners can use this system effortlessly.

My only criticism of the Yellow Jacket is the lack of anti-blowback, which means you can lose some refrigerant when you disconnect.

However, this is minimal if you use the equipment correctly.

The Yellow Jacket 42004 strikes a good balance of performance and cost.

It's more affordable than the Testo 557 or Fieldpiece SM480V, and I recommend it for experienced HVAC technicians or complete beginners.

Feature

Details

Guage Type

Analog

Maximum Pressure

800 PSI

System Accuracy

1%

Refrigerant Compatability

All common refrigerants including R-22, R-404, R-410A

Ports

3 ports

Weight

4 lbs

Hose Length

60 inches

Warranty

1-year


2. Testo 557 Digital Manifold Kit

4.6

Overall Score


Accuracy

5.0

Current Progress
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Usability

5.0

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Value for Money

4.0

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Who is the Testo 557 Digital Manifold Kit best for?

The Testo 557 is best for experienced HVAC professionals working on commercial or industrial setups.

Pros
  • Precise and reliable digital readings
  • Wireless connectivity function
  • Large display screen
  • Advanced features- including data logging and pressure differential management
  • Durable Construction
CONS
  • Expensive
  • Learning curve to get used to it
  • Poor quality hose - consider buying a separate one

The Testo 557 combines cutting-edge technology with reliability.

It’s a step up from other HVAC gauges with more advanced features that make even complex HVAC system maintenance a breeze.

It uses a 4-port system to provide simultaneous high and low-pressure readings and has an integrated vacuum gauge as standard.

The accuracy of the readings is what impressed me most. It is even more accurate than the Yellow Jacket 42004, and you’ll struggle to get closer to perfect readings.

This digital precision is what makes it well-suited to more precise HVAC equipment.

It may not be the simplest HVAC gauge, but the user interface helps.

It has a large backlit display screen to clearly present readings, intuitive button controls, and user-friendly calibration.

It also has a bespoke App (the Testo Smart App) for remote control.

The app lets you program and monitor your device wirelessly from your phone (using Wi-Fi or Bluetooth) and even stores historical readings to see trends/service data.

The app makes it easier to manage the HVAC systems remotely and is particularly useful for busy professionals looking to be more efficient.

The downside of the Testo 557 is the price. It costs a lot more than the Yellow Jacket 42004 or Mofeez and is not great value for routine residential maintenance.

However, the advanced features and quality make it a real asset to professionals.

I recommend it for professionals who need high-performing service tools for complex HVAC equipment.

Feature

Details

Guage Type

Digital

Maximum Pressure

870 PSI

System Accuracy

> 0.5 %

Refrigerant Compatability

40 refrigerants including R-22, R-134a, R-404A, R-410A, R-407C, R-507

Ports

4 ports

Weight

2.6 lbs

Hose Length

60 inches

Warranty

2-years


3. OMT AC Gauge

4.6

Overall Score


Accuracy

5.0

Current Progress
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Usability

4.5

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Value for Money

4.5

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Who is the OMT AC Gauge best for?

The OMT AC Gauge is best for professional auto mechanics or DIY car owners looking for a reliable and cost-effective AC gauge.

Pros
  • Compact and portable
  • Specifically designed for automotive AC systems with R-134a refrigerant
  • User-friendly with clear readings
  • Easy to connect and disconnect quickly with several adapters
  • Affordable
CONS
  • Limited features
  • Not as compatible as other units
  • Less durable construction and not as long-lasting

The OMT AC gauge is essential for any car owner’s toolkit. It has a compact and user-friendly design ideal for automotive work and an asset in any garage.

The OMT AC gauge is small, portable, and practical.

It's perfect for use in the limited space of a car engine compartment and much easier to use in a small space than the Testo 557 or Fieldpiece gauges. It even has a hook so you can work hands-free.

Despite the small frame, it's surprisingly tough, made from a mix of durable brass and aluminum strong enough to endure a mechanics garage.

What I really like about this AC gauge is its practical simplicity.

The analog displays show the readings clearly to make HVAC diagnostics easy. It isn’t as accurate as the Yellow Jacket, but the system accuracy is still better than most analog gauges.

This gauge is also easy to install (or uninstall) on your HVAC system, with color-coded hoses that make easy identification of each connection.

You can fit or disconnect it in minutes, perfect for work on multiple cars.

The OMT AC gauge may not have all the bells and whistles of the Testo 557 or Yellow Jacket 42004, but it offers good value for money.

If you want a simple and affordable HVAC manifold for working on your cars, this is the one I recommend.

Feature

Details

Guage Type

Analog

Maximum Pressure

600 PSI

System Accuracy

1.6%

Refrigerant Compatability

R134a, R12, R22, and R502 refrigerants

Ports

3 ports

Weight

3.5 lbs

Hose Length

60 inches

Warranty

1-year


4. Mofeez Manifold Guage Set

4.4

Overall Score


Accuracy

4.5

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Usability

4.5

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Value for Money

4.25

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Who is the Mofeez Manifold Guage Set best for?

The Mofeez manifold gauge set is best for DIYers or technicians on a budget performing semi-frequent routine domestic AC system checks.

Pros
  • Really affordable
  • Clear analog display for easy reading of the measurements
  • Simple to set up and use
  • Portable, with a handy carrying case
  • Good value for domestic use
CONS
  • Basic features
  • Less refrigerant compatibility
  • Not accurate enough for professional use

The Mofeez HVAC gauge set proves you don’t have to pay a fortune to perform an accurate diagnostic check.

This equipment is perfect for those on a budget and will provide all your pressure readings without breaking the bank.

The Mofeez is very user-friendly, with clear analog gauges that display the unit readings.

It’s simple to set up and, like the OMT manifold gauge set, has color-coded hoses to help beginners connect it correctly.

It's also lightweight and portable, with a handy carrying case to keep the manifold gauges safe during transport.

This is useful for transporting the gauge set components across sites or for storage if you use manifolds less frequently.

The Mofeez manifold gauge set offers good value - not just a low price.

It's reasonably long-lasting (if not as heavy-duty as the Testo 557 manifold unit), and the readings are reliable.

It may not be as capable or precise as the Yellow Jacket 42004 or Fieldpiece SM480V manifold gauges, but it can handle routine HVAC tasks.

Just be sure to check the specific requirements of your HVAC system first because this gauge set is not compatible with as many refrigerants.

The Mofeez is not suitable for professionals looking for precise measurements to perform complex recovery work.

However, I recommend this gauge set as an affordable way to manage your home AC and heat pumps.

Feature

Details

Guage Type

Analog

Maximum Pressure

600 PSI

System Accuracy

3-5%

Refrigerant Compatability

R134A, R12, R22 Refrigerants

Ports

3 ports

Weight

4lbs

Hose Length

47 inches

Warranty

1-year


5. Fieldpiece SM480V

4.2

Overall Score


Accuracy

4.5

Current Progress
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Usability

4.25

Current Progress
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Value for Money

3.75

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Who is the Fieldpiece SM480V best for?

The Fieldpiece SM480V is best for providing detailed diagnostics across multiple complex residential or light-commercial HVAC or refrigeration systems.

Pros
  • Complete control remotely
  • Excellent Job Link app
  • Can manage multiple refrigerants and HVAC systems at once
  • Heavy duty
  • Additional features and readings
CONS
  • Expensive
  • Depends on the battery for power
  • Learning curve with the technology and settings

The Fieldpiece is another advanced model that uses technology to provide precise readings and one of the best gauges for HVAC professionals performing a deep diagnostic check.

Alongside pressure, the digital manifold gauge set also provides:

  • Evaporator temperature
  • Condenser temperature
  • Ambient temperature
  • Superheat value
  • Subcooling value

It even has a tightness test to check for leaks after repair work.

The readings are displayed simultaneously on a large touch screen display, and it does all the math for you.

This model is rugged as well as smart. The durable construction adds to the longevity of the digital manifold, and the low-loss hoses are also surprisingly tough.

The quality is clear, but the stand-out feature of the Fieldpiece HVAC system is the connectivity options.

The 'Job Link' App is accessible on all smart devices (with Wi-Fi or Bluetooth), giving you real-time monitoring, data logging, and remote system analysis.

I've used a lot of different HVAC apps, and this is one of the best.

It can simultaneously store the details for 9 systems and is perfect for HVAC professionals who want to access critical information from several projects.

The only downside of this digital manifold is that the connections can come loose, so I recommend thoroughly checking the equipment when it arrives.

The Fieldpiece SM480V is not as well-suited to industrial HVAC systems as the Testo 557, but it can handle larger equipment.

It is expensive, but I recommend it for HVAC professionals who want to more quickly, efficiently, and intelligently.

Feature

Details

Guage Type

Digital

Maximum Pressure

800 PSI

System Accuracy

0.5%

Refrigerant Compatability

70+ refrigerants, including R32 refrigerant

Ports

4 ports

Weight

4 lbs

Hose Length

60 inches

Warranty

1-year


Top Rated Manifold Gauges Compared

Preview

Name

Rating

System Accuracy

Refrigerant Compatability

Price

Yellow Jacket 42004 Series 41 Manifold with...

Yellow Jacket 42004

4.8

1%

All common refrigerants including R-22, R-404, R-410A

Testo - 0563 1557 testo 557 I Digital...

Testo 557 Digital Manifold Kit

4.6

> 0.5 %

40 refrigerants including R-22, R-134a, R-404A, R-410A, R-407C, R-507

Orion Motor Tech AC Gauge Set with Self...

OMT AC Gauge

4.6

1.6%

R134a, R12, R22, and R502 refrigerants

Mofeez Pro AC A/C Diagnostic Manifold Freon...

Mofeez Manifold Guage Set

4.4

3-5%

R134A, R12, R22 Refrigerants

Fieldpiece SM480V SMAN Digital Manifold...

Fieldpiece SM480V

4.2

0.5%

70+ refrigerants, including R32 refrigerant


What to Consider When Buying an HVAC Gauge

Analog vs Digital – What Do You Prefer?

1. Analog Gauges

Analog gauges use mechanical components and have a needle or dial to show the AC system readings.

Pressure and temperature changes cause the gauge set dial to move, and technicians can interpret the readings to assess the system's performance.
2. Digital Gauges

Digital gauges work using electronic sensors to measure pressure and temperature.

The digital manifold data is displayed digitally on a screen, usually as precise numeric values showing system performance.

It’s down to personal preference. Still, I recommend a digital gauge over an analog gauge because they offer more accurate measurements.

The table below shows the benefits and drawbacks of the two gauges:

 

Analog Gauge

Digital gauge

Pros

  • Cost-effective
  • No reliance on batteries
  • Simple
  • Higher accuracy and precision
  • Clear readings with easy-to-read displays
  • Advanced features (logging historical data, remote access, etc.)

Cons

  • Harder to interpret the readings
  • Less exact measurements
  • Fewer advanced features
  • More expensive
  • Requires a power source
  • Often more complicated with more sensitive components

Best for?

  • Basic HVAC systems with straightforward requirements (usually residential)
  • More advanced air conditioning systems that need precise diagnostics (usually commercial)
  • HVAC technician who wants clear and precise readings

Recommended model

Yellow Jacket 42004 HVAC gauge set

Testo 557 digital manifold or Fieldpiece SM480V digital manifold

TL;DR: Analog gauges are cheaper but difficult to use. Digital gauges are expensive but easier to use and are suitable for advanced systems.

What Type of Refrigerant Detection Do You Need?

HVAC gauges determine the refrigerant pressure, but only if your device is compatible with the type of refrigerant used in your air conditioning system.

Notes / Tips:

If your HVAC gauge set can’t detect the different refrigerants, it's useless.

There are multiple refrigerants used in domestic and industrial settings, including:

  • R-410A - the most commonly used refrigerant in residential and commercial air conditioning systems.[2]
  • R-22 - refrigerant used in older systems but has mostly been replaced by R-410A because of environmental concerns.
  • R-123a - standard refrigerant in automotive air conditioning systems.
  • R-404A - commonly used in refrigeration systems, particularly supermarket freezers and coolers.
  • R-401C - used in air conditioning systems and other applications.
  • R-42 - used in some residential AC system models as a more environmentally friendly option.

Most modern HVAC gauges are versatile and can detect different refrigerants, and you can find compatibility in the specs.

I recommend HVAC gauges that are compatible with R-22 and R410A common refrigerants at a minimum.

If you are using your gauge set with multiple refrigerants, I recommend the Fieldpiece SM480V as it’s the most versatile.

TL;DR: This point cannot be stressed enough. Choose a gauge that can work with your system's refrigerant.

Do You Only Need a Micron Detector?

Micron gauges measure the vacuum level and are essential for vacuating gas and moisture from your HVAC system.[3]

Micron detectors are not a standard component of HVAC gauges, but some of the best gauges include them.

I recommend HVAC gauge sets with integrated micron detectors (like the Fieldpiece SM480V or Testo 557) for HVAC technicians regularly performing recovery work/evacuation of HVAC systems.

TL;DR: Micron detector are a supplemental components used to measure vacuum levels. This is mostly used by professionals. 

Is It Compatible with Your HVAC System?

Your HVAC gauge set needs to be compatible with any refrigerants used in your HVAC system, but you should also check the following:

  • Hose connections
    The gauge set needs appropriate hose/hoses that can connect securely with your HVAC system and that it can connect securely.
  • Pressure range
    Different systems have different refrigerant pressure levels. HVAC gauges must be able to handle the minimum and maximum pressure to give precise readings.
  • Suitability
    Some HVAC manifold gauges are only suitable for specific systems (commercial, residential, or automotive). Professional auto mechanics need different equipment than HVAC technicians or hobbyists. Make sure you choose a suitable device.

Always check the HVAC gauge specs to ensure they meet your requirements and compatibility standards.

If you need a versatile unit, I recommend the Yellow Jacket 42004 HVAC gauge set.

TL;DR: From hoses to pressure range, you have to make sure that the gauge you intend to use is compatible with your HVAC system.

The Durability of Components and Seals is Very Important

Durable and high-quality manifold gauges will be longer-lasting, prevent leaks, and improve system efficiency.

At a minimum, you need a service tool with solid seals to prevent refrigerant leaks.[4]

I recommend buying a highly-rated unit from a quality manufacturer that you can trust.

All the best HVAC gauges listed above are reliable (some made from solid brass or aluminum), but the Testo 557 is the most heavy-duty and durable.

It's also low maintenance and will automatically detect any leaks.

Most damage happens during fitting, so take your time and install your HVAC gauges properly.

A user-friendly model, like the Yellow Jacket 42002, is good for beginners because it's simple to install.

3 Port vs 4 Port Gauge

 

3 Port HVAC Gauge Type

4 Port HVAC Gauge Type

Number of Ports/Gauges

Two (High Pressure and Low Pressure), plus one for refrigerant source

Two (High Pressure and Low Pressure), plus two additional ports

Operation

Manual switching for high and low-pressure readings

Simultaneous readings for both high-pressure and low-pressure

Advantages

  • Simple operation
  • More affordable
  • Simultaneous measurements (including vacuum levels)
  • Versatility, More compatibility with various systems

Drawbacks

  • No simultaneous readings
  • Switching hoses adds an extra step to measurements
  • More complex design
  • Higher cost

Best for

Basic HVAC systems with straightforward service requirements

More complex HVAC and refrigeration systems

Recommendation

Entry-level technicians or beginners performing routine maintenance

More experienced technicians working with larger systems to get more complex diagnostics and do AC charging work

Recommended Model

Yellow Jacket 42004 Manifold gauges

Testo 557 Digital Manifold gauges

TL;DR: For simple and small HVAC appliances or systems, 3 port gauge is used. For more complex systems, 4 port models are used.

Check for Specified Accuracy Range

Unfortunately, no measurement tools are 100% accurate, and with HVAC gauges, you need to know the accuracy range.

The system accuracy is how close the manifold gauge reading will be to the true pressure rating, and it's shown as a %.

If an HVAC gauge is ±2%, the manifold gauge reading could be 2% higher or lower than the true value.

The lower the specified accuracy range, the more precise the HVAC manifold gauge will be, and accurate measurements are the key to optimizing your heating and cooling.[5]

Precision HVAC systems need very accurate readings for proper repair and maintenance.

The average accuracy readings will vary depending on the gauge type:

  • Analog gauges are typically ±2% - ±5% of the full-scale reading.
  • Digital gauges are typically more accurate than analog gauges, with an accuracy rating of ±1%- ±2% (or better)
I recommend an HVAC gauge accuracy range of under ±4% for basic residential system diagnostics.

I recommend an HVAC manifold gauge with under ±2% accuracy range (like the Testo 557) for high-performance or precision critical applications.

TL;DR: The more precise cooling you need, the higher the accuracy you need to look for. Accuracy can range between ±1%-5%. The more accurate the gauge is, the more expensive it will be.

Price and Warranty Considerations

Depending on the specifications., HVAC gauges can cost anywhere from $50-$1000.

  • Entry-level analog gauges can cost $50-$150, and a high-end analog gauge can cost over $400.
  • Casic digital manifold gauge sets cost $100-$200, with some of the best digital HVAC gauge sets costing over $900.

It’s important to balance cost with performance to get good value from your gauges. I recommend the Mofeez manifold gauge set if you have a tight budget.

It’s worth looking for a manifold gauge with a solid warranty to protect your investment.

The warranty lengths can vary, but I recommend looking for at least 1 year of protection.

Additional Features

Hook for Hands-Free Use: 

Some of the best HVAC gauges, like the OMT AC gauge set, have a simple hook to hang the device and use it hands-free.

It’s useful for HVAC technicians performing automotive work, complicated diagnostics, completing documentation, or multi-tasking.
Wireless and Data Logging:

Wireless control options and data logging let you monitor the data from your manifold gauges over the long term to see trends with your HVAC system and uncover issues.

The wireless control also makes it easy to manage multiple ACs or heat pumps and work in confined spaces.

If you’re performing regular maintenance on multiple HVAC systems, I recommend a digital gauge like the Fieldpiece SM480V.

Color-Coded Hoses and Readings:

Color-coded hoses and readings let you work quickly and accurately, helping to prevent errors and make reading the manifold gauge easier.

The most common color-coded hoses are:

  • Red - high pressure
  • Blue - low pressure
  • Yellow - refrigerant recovery
  • Black - Vacuum pump/evacuation
  • Green - multi-use

A manifold gauge like the OMT AC gauge set with different color coding can make life easier.

Ergonomic and Portable:

HVAC technicians in the field need a portable HVAC gauge set.

Make sure it's lightweight (under 10 pounds) and has an ergonomic design so the gauge fits comfortably into your hand, with a textured grip for a secure hold.

Some models, like the OMT AC gauge set, even have a handy carry-case to make it more portable.

Alerts:

An HVAC gauge with an alert system will notify you when the AC system falls out of the specified range.

The high-pressure and low-pressure alerts make proactive management of your air conditioning/refrigeration system easier and allow you to carry out repair work quickly.

The high-quality Testo 557 and Fieldpiece SM480V manifolds have pressure alert functionality that is particularly useful for beginners or professionals.

TL;DR: There are several additional features that gauges can have. Some features such as wireless connectivity can add further to the cost.


How We Review & Rank Our Product List

At Air Conditioner Lab, our team follows a similar process when evaluating all products reviews before formulating our final lists for readers.

We begin by gathering data sources directly from brands, e-commerce platforms, online retailers and press releases.

These are then added to a master file we use to compare features specifications from all humidifier models. You can access this HVAC Sheet Here.

Next, we narrow down all the products on the market by evaluating user reviews, ratings and feedback from a wide variety of online and in-person sources.

Our team then discusses and co-ordinates our first hand experiences using these products, as well as gather independent opinions and feedback through Youtube and customer reviews.

Common HVAC Gauge Issues & Quick Fixes

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Inaccurate Readings

  • Check and calibrate the manifolds using the manufacturer's instructions and tighten the connections.

Pressure Fluctuations

  • Look for blockages or restrictions in the gauges' refrigerant line and check the service valves are operating fully.

Hose not connecting properly

  • Lubricate hose fittings with a refrigerant-compatible lubricant. Check for and remove any debris around the connectors and ensure the O-rings are in good condition.

Low Battery Indicator

  • Replace the batteries with fresh ones.

Display Issues (blank screen, flickering on a digital gauge)

  • Check for loose or damaged display connections and reconnect them to stabilize the power supply.
  • You may need to contact the manufacturer if you can't fix the issue.

Hose Leaks/Hissing from the device

  • Inspect hoses for visible damage and replace them if necessary. Tighten hose connections securely and use proper thread sealant on hose fittings.

Frozen Gauge

  • Keep the gauge within the specified temperature range. Thaw the gauge slowly if it has been exposed to extreme cold.
  • Verify that no moisture inside the gauge could cause more damage.

Valves Stuck

  • Apply a refrigerant-compatible lubricant to the valve components. Gently tap the stuck valve to free it, but avoid excessive force. If the issue persists, consult the manufacturer or a professional.

Readings Won't Reset

  • Check for any lingering pressure in the system and vent. Check for blockages in the hoses or valves preventing proper venting.
  • Follow the gauge zeroing procedure in the instructions.

Needles Won't Move

  • Check the gauge set is connected to the system and the service valves are open.
  • Check for obstructions in the hoses or the gauge itself.
  • If it still doesn't move, you may need to replace the refrigerant in the system.

FAQs

Are All HVAC Gauges The Same?

No, HVAC gauges all measure low pressure, high pressure, and temperature in refrigeration systems, but the precision, features, and compatibility differ in manifolds.

How Long Should a Manifold Last?

A manifold gauge can last 5-10 years if properly maintained.

What Causes Manifold Issues?

HVAC manifold issues are typically caused by wear and tear, refrigerate contamination, damage to hoses or fittings, or exposure to extreme conditions. Using manifolds properly and performing regular maintenance will help to prevent issues.

How Do You Accurately Read HVAC Manifold Gauges?

Connect the manifold to the HVAC system ports, allow pressure to stabilize, and note down the high and low pressures and temperatures. You can then use the system specifications and charts to interpret the readings.

So, Which is the Right Gauge for Your Needs?

Your HVAC gauge should match your HVAC system, so it’s not one size fits all.

However, the Yellow Jacket 42004 manifold gauge is my top pick because it’s easy to use, high-quality, accurate, and versatile enough to work with any domestic or light-commercial system.

There's something on the list for everyone, and hopefully, this buyer's guide has helped you find the right equipment to suit your needs.

My #1 Recommendation
Yellow Jacket 42004

  • Versatile and compatible with most HVAC systems
  • Durable construction (solid brass)
  • Easy to use (long hose length for easier placement)
  • More accurate than other analog gauges
  • Affordable - and great value! 

References: 

  1. https://www.energy.gov/eere/buildings/about-smart-tools-efficient-hvac-performance-campaign
  2. https://ww2.arb.ca.gov/resources/documents/high-gwp-refrigerants
  3. https://sciencenotes.org/what-is-a-micron-definition-and-examples/
  4. https://www.epa.gov/snap/refrigerant-safety
  5. https://www.sciencedirect.com/science/article/abs/pii/S2352710222001723 
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Josh Mitchell

Founder

Josh Mitchell
My name is Josh and I am obsessed with home appliances. From portable AC units to heaters and air purifiers, I enjoy testing, learning and using these devices to improve the air quality inside my family home.

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