Stainless steel heat exchangers are better.
Some manufacturers only use stainless steel heat exchangers in their tankless water heaters. At Rinnai, we use stainless steel in our condensing models due to the corrosive nature of condensation produced by extra high-efficiency tankless water heaters. But in our non-condensing models, we use copper heat exchangers because they are a much better conductor of heat. The Tankless Truth is stainless steel is not always the best material. It is important to use the right material for the right application.
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The right material for the right job.
Ben discusses how Rinnai uses both stainless steel and copper heat exchangers for their condensing and non-condensing water heaters.
Stainless or Copper? Rinnai believes in both.
Eric dispels this myth by showing when it comes to tankless water heaters, Rinnai always uses the most efficient metal for the job.