Shortly after the magazine came out, I received an email from a reader pointing out the obvious — that obtaining superheat and subcooling readings usually requires the use of both gauges and a thermometer. Yes, this is true. But perhaps I should have gone on to add the following.
If you needed a tool that would best describe an HVAC technician or his company, it would be his manifold and gauges. Other than hand tools, that’s the one most technicians carry. So, it would be unusual to think of a tech going on a “preventive maintenance” or “tune-up” call without connecting this device.
I recently read an article in a local HVACR magazine that somewhat addressed this problem, which I guess we all should have foreseen coming because R22 is getting very scarce and its price is skyrocketing.
Has it come to this? Well,
not yet, but possibly soon! I recently read an article telling of how some
companies are marketing a hydrocarbon refrigerant to replace R-22 in air
conditioners, and they are marketing it to consumers, not HVACR supply