NAVAC - HVAC School

Utilizing industry-leading technology, NAVAC has developed the world’s first smart refrigerant charging machine, NRC62i, and the industry’s first smart vacuum pump NRP8Di.

Starting with end users’ requirements in mind, NAVAC integrates state-of-the-art technology and quality manufacturing to deliver a superior experience and a more relaxed, time-saving, enjoyable work environment.

Utilizing industry-leading technology, NAVAC has developed the world’s first smart refrigerant charging machine, NRC62i, and the industry’s first smart vacuum pump NRP8Di.

Products We Love

SMART VACUUM PUMPS
NRP6Di
NRP8Di

BRUSHLESS DC PUMPS WITH SMART CONTROL

MANIFOLD GAUGES
NRM2B0201
NRM2B0202
NRM2B0301
NRM2B0302

IMPACT-RESISTANT AND PRECISE PERFORMANCE
Incorporating the latest ergonomic research and advanced design, it’s easy to handle and delivers high precision with Class 1.0 accuracy. The integrated, impact-resistant body design provides outstanding protection. With ball valve handle and easy folding hook design, they are easy to carry.

MICRON VACUUM GAUGE
NMV1

PRECISE MEASUREMENT WHEN IT COUNTS
It uses the Pirani high-precision vacuum sensor to precisely measure vacuum levels.
Digital display affords a comprehensive view of vacuum conditions.
When reaching the preset vacuum level, it will buzz as a reminder. When the vacuum level decreases from the preset vacuum level, it will buzz rapidly and flash the backlit to warn of leaks.

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Our latest Podcast

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

In this short Q&A podcast, Bryan answers a listener-submitted question about apps for doing proper loads. Fred specifically asks about apps or charts that can help an HVAC contractor determine the insulation value of a home without assuming numbers or drilling into walls during load calculations.

Load calculations account for all the ways that BTUs can enter or leave a home: conduction, convection, and radiation. Insulation prevents heat transfer via conduction, so it’s important to the load calculation process. High-end HVAC design software like Wrightsoft and Kwik Model 3D will have these features built into them (based on the age and location of the home). ASHRAE’s handbook also has tables and data with R-values and U-factors to help you out with Manual J load calculations.

RED Calc is an app that allows you to calculate a wall’s R-value with measurements, including surface and air temperatures indoors and outdoors. This RED Calc software is available through the U.S. Department of Energy, as is REScheck. The DOE insulation fact sheet is also quite valuable, as are The Engineering Toolbox and materials straight from the insulation manufacturers.

The best way to get a comprehensive load calculation is to have a lot of tribal knowledge about how houses are built in your area, analyze energy bills, and combine tools like RED Calc with building performance tests.

RED Calc is available through the U.S. DOE at https://basc.pnnl.gov/redcalc. REScheck is available at https://www.energycodes.gov/rescheck.

ASHRAE’s resources are available at https://ashrae.org/technical-resources.

Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.

Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.