Ductless mini-split line sets from Great Lakes Copper are factory assembled line sets for mini-split systems. Provided with flared ends using heavy-duty 45 degree forged brass fittings, and ...

The company’s entire line of standard and mini-split line sets are now UL recognized at 700-psi maximum working pressure. According to the manufacturer, it is the first company in the industry to ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Thom Dunn Thom Dunn is a writer focusing on home heating and cooling. He once ...