Mainstream Engineering® is a thermal control and energy conversion R&D-based manufacturer that focuses on transitioning advanced technology into high-quality and cost-effective products-all made in the U.S.A. Our focus areas include heat transfer, fluids, thermodynamics, mechanics, chemistry, nano-technology, and power electronics. Mainstream’s partners include DOD, NASA, DOE, DOT, EPA, NIST, USDA, and commercial industry leaders. Our commercial brands include: QwikProducts - HVAC Accessories EPA Test - EPA 608 Certification Mainstream Marine - Boating Accessories Safe Boating Card - State-approved boater safety certification Fix My A/C - Residential HVAC Solution Guide StoveLabs - Clean outdoor cooking solution