What does the 6% leak rate refer to?

The 6% leak rate refers specifically to the minimum leak rate that triggers mandatory repairs under EPA regulations. This means that if an HVAC system is found to be leaking refrigerants at a rate of 6% or more per year, the owner is required to take action to repair the leak. This regulation is in place to minimize refrigerant emissions into the atmosphere, as many refrigerants have been identified as harmful to the ozone layer and contribute to climate change.

Understanding this percentage is crucial for compliance with environmental regulations, which aim to protect both air quality and environmental sustainability. It's important to recognize that this regulation emphasizes the responsibility of HVAC professionals and system owners to monitor and maintain their systems to prevent excessive leakage of refrigerants.

While there are discussions about maximum allowable leak rates and average leak rates in different contexts, the specific mention of 6% in the context of mandatory repairs points directly to the regulatory compliance aspect established by the EPA.