Gas tankless water heaters are able to produce a larger temperature rise per gpm than electric models. Most demand water heaters are rated for a variety of inlet temperatures. Typically, a 70°F water temperature rise is possible at a flow rate of 5 gallons per minute through gas-fired demand water heaters and 2 gallons per minute through electric ones.
This seems to strongly imply that a 5gpm electric tankless might not be able to raise the temperature of the water to something comfortable. You might want to get clarification on that point before agreeing to the installation.
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This seems to strongly imply that a 5gpm electric tankless might not be able to raise the temperature of the water to something comfortable. You might want to get clarification on that point before agreeing to the installation.