Search results for HVAC are below:

http://midwestsnips.com/

Midwest Tool and Cutlery manufactures the highest quality snips and hand tools on the market today. The blade life and cutting performance of Midwest Snips® aviation and tin snips is lab and field test proven to exceed that of all other snips manufacturers. -Midwest Snips

https://www.bestairpro.com/

BestAIR Pro is the brand that trade professionals use and trust. We provide the highest quality filters and parts that allow HVAC service techs to perform their jobs with extreme confidence. All of our filters are made in the USA, UL listed -BestAIR Pro

BestAIR Pro has been manufacturing products in the USA since 1964. -BestAIR Pro

https://www.channellock.com/

Our tools are made with pride in the U.S.A. Founded in 1886, CHANNELLOCK, Inc. is a worldwide leader in the manufacturing of high-quality pliers and assorted hand tools. -CHANNELLOCK

http://www.kleintools.com/

Klein Tools continues to invest in U.S. manufacturing and is committed to maintaining its place as the favorite among electricians. Klein is the only major tool manufacturer worldwide focused on electrical and utility applications. No other manufacturer of hand tools and related products used in electrical applications makes more items in America than Klein Tools. -Klein Tools

The vast majority of the products we sell are made in the USA. The exact percentage changes frequently as we insource some products to our USA plants and add new products to our lineup. Klein has introduced many new US-manufactured products in recent years (hole-making, screwdrivers, fish tapes, utility wrenches, buckets, bags, etc.). -Klein Tools

◊ Note-> Most of their products are manufactured in the USA.