I'm wondering how to interpret UEF (Uniform Energy factor) or EF (Energy factor) for water heater in OS. There are thermal efficiency and on cycle loss fraction for input. Which is the best representative of UEF or EF?

Thanks for any advice.

I'm wondering how to interpret UEF (Uniform Energy factor) or EF (Energy factor) for water heater in OS. There are thermal efficiency and on cycle loss fraction for input. Which is the best representative of UEF or EF?

Thanks for any advice.

I'm wondering how to interpret UEF (Uniform Energy factor) or EF (Energy factor) for water heater in OS. There are thermal efficiency and on cycle loss fraction for input. Which is the best representative of UEF or EF?

Thanks for any advice.