Westinghouse is a famous water heating products developer based in Massachusetts, USA. With a strong focus on using the highest quality materials like high-grade stainless steel instead of copper and aluminum, the Westinghouse heaters are built to last long without any noticeable drops in their performance. This long life expectancy is secured by the 12 year limited warranty provided by the company. Thanks to the refined combustion control system, the Westinghouse units feature very low NOx emissions, while their energy factor which is also certified by ENERGY STAR reach the amazing value of 0.98. The higher powered units can deliver up to 200000 BTUs per hour, and can even function at an altitude of 10000 feet above sea level, which is indicative of their operational quality.