Two HVAC nitrogen purging regulator/flowmeters are available for the HVAC market. The regulators incorporate a hybrid design and function as both a pressure regulator and flowmeter depending on the ...

For newer technicians on the job, here are a couple of HVAC service tips about leak testing and evacuating after repairing a system. The best way I've found to leak test a system is to pressurize it ...

Nitrogen is often the most limiting nutrient in growing plants. When deficient, plant yields and quality are reduced. However, excessive nitrogen applications could cause concerns in water quality and ...