What is a good standby loss for water heaters?
What is a good standby loss for water heaters? For electric water heaters, the EF is typically around 0.9, and for natural gas water heaters it's around 0.6. By going to a tankless gas water heater, you can reduce the standby losses greatly and get that up to about 0.82 or so. How do I calculate my standby water heater? Standby efficiency is the water heater's ability to contain heat in the tank. A minimum of heat loss per hour is desired. Basic formula: temperature change per hour = [BTU/H loss per square foot of tank surface] divided by [“R”...