America's Leading Discount HVAC Supplier Since 2001 ...
and now, NASCAR Racing Sponsor![]()
Ask an Expert
866 862 8922
Hours of Operation Most linesets today are sealed at each end to prevent the introduction of moisture. "Precharging" refers to a nitrogen charge not a freon charge, so either way refrigerant is required to fill the total volume of the piping. Nitrogen charges are no longer commonly used in linesets.