Which tankless water heater brand is the best in Canada?

Which tankless water heater brand is the best in Canada includes several top brands that are popular and well-supported in Canada with CSA certification and cold-weather performance. Best overall for most Canadian homes is considered Rinnai, Japanese brand founded in 1920 in Nagoya, Japan, made in Japan and Griffin, Georgia, USA, sold in Canada at Home Depot Canada and via contractors, costing $1000 to $3000 CAD, known for excellent reliability, high efficiency, and good cold-weather performance, averaging 4.6 stars, with long lifespan of 20 plus years and excellent warranty. Navien, Korean brand founded in 1978, made in South Korea, is also considered best in Canada, known for high efficiency up to 0.98 UEF and good value, costing $1000 to $2500 CAD, 4.5 stars, popular in Canada. Noritz, Japanese brand, is also excellent, costing $1000 to $2500 CAD, 4.5 stars. For Canadian support, Rheem and A. O. Smith tankless are also good, costing $1000 to $2500 CAD, with good parts availability. So best tankless water heater brand in Canada is Rinnai for overall reliability and cold-weather performance, Navien for high efficiency and value, and Noritz for quality, all excellent, with Rinnai often ranked top by Canadian plumbers for tankless, especially for cold Canadian winters with good freeze protection.