The number of degrees a vapor is above its boiling point at a specified pressure is known as superheat. Let’s take a look at why superheat is so important in the HVAC industry.
What Is Superheat In HVAC?
Superheat is used to measure the amount of heat energy contained in the refrigerant gas within an HVAC system. By keeping track of superheat, HVAC professionals can ensure that the refrigerant is neither overheating or damaging the compressor overall.
Superheat can ultimately tell a homeowner a lot about their HVAC system. For example, a superheat that is too high might indicate the refrigerant is overcharging. If it is too low, it may mean the refrigerant is undercharging.
Superheat is also used to troubleshoot several other issues in an HVAC system. These issues can include a clogged filter or thermostat settings.
Superheat And Subcooling HVAC
Both subcooling and superheat are important HVAC concepts. Superheat is the number of degrees a vapor is above its boiling point at a specified pressure. Meanwhile, subcooling is the number of degrees a liquid is below its freezing point again at a specified pressure.
HVAC professionals can more easily diagnose system problems by accurately keeping track of subcooling and superheat.
What Is A Good Superheat?
While there is no set answer for this question, a recommended superheat is between 10-20 degrees Fahrenheit. Ideal superheat will vary based on the specific HVAC system.
How To Calculate Superheat Formula
Follow these quick steps below to calculate the superheat formula:
- Subtract the refrigerant’s boiling point from the refrigerant’s vapor temperature.
- For example, when the boiling point is 100 degrees and the refrigerant is 120 degrees, you have a superheat of 20 degrees Fahrenheit.
What To Do If Superheat Is Too High
A superheat that is ultimately too high can be a sign of overcharging refrigerant. This may result in a few problems, including wear and tear on the compressor. Overall efficiency may decrease, as well.
Cascade Mechanical HVAC Services In Tempe, AZ
Need commercial AC repair in Phoenix Arizona? Call Cascade Mechanical, Inc. at 602-233-3265. We offer complete commercial HVAC services like chiller tube repair cooling towers, and heat exchangers to Scottsdale, Phoenix, Mesa, Gilbert, Chandler Arizona and more!