Tankless coil water heaters are most efficient during cold months when the heating system is used regularly but can be an inefficient choice for many homes especially for those in warmer climates.
Tankless coil vs indirect water heater.
Can be used in any climate and the fuel sunshine is free and a renewable resource.
Indirect water heaters can be powered by electricity gas solar or a combination of these.
Indirect water heaters have a limited hot water supply and require flushing two issues a tankless heater is less prone to.
When it comes to energy efficiency both indirect heaters and tankless systems are almost equivalent.
May require a backup system for cloudy days or high demand times.
Tankless water heaters can provide a certain number of gallons per minute based on their rating indefinitely.
In terms of energy efficiency standpoint the on demand heaters and indirect systems are equal.
Meanwhile an indirect heater can provide unlimited hot water per minute up to as many gallons as the tank can hold.
However tankless heaters usually run off on either gas propane or natural gas or electricity.
50 more efficient than gas electric water heaters.
Oil gas electricity propane solar energy or a combination of any of them can fire the indirect systems.
In fact due to their small size tankless water heaters can be mounted on the wall.
Indirect water heaters are a more efficient choice for most homes even though they require a storage tank.
Tankless water heaters compact in size take up less space than tank style water heaters.
Also by providing hot water only when it is needed tankless water heaters waste less water and eliminate standby losses associated with maintaining a tank full of hot.