Propane or natural gas and electric both have their pros and cons but in general electric units are the most efficient having a 99 heat transfer efficiency while natural gas units are less so around 80 though condensing units are nearly as efficient as electric.
Outdoor gas tankless water heater.
Indoor vs outdoor tankless water heater.
Rather you need to consider the pros and cons of each to decide which would be more suitable for your situation.
Next you need to pick between indoor and outdoor.
There are two main types of tankless heaters.
Rinnai tankless water heaters last up to twice as long have twice the warranty and save energy as they only heat water when it is needed.
Rinnai super high efficiency plus 9 8 gpm indoor natural gas tankless water heater.
Rheem performance plus 9 5 gpm natural gas outdoor tankless water heater model eco200xln3 1 view the performance plus tankless gas water heater 1 020 00 1 020 00.
Thermalux 6 6 gpm liquid propane outdoor front exhaust residential tankless water heater 140 000 btu model gq 2039ws et us lp view the thermalux tankless water heater collection.
It is normally used for the whole home large flow rate and high energy efficient performance makes it more and more popular on tankless water heater markets.
If you are interested in the item just get to the best outdoor tankless gas water heater.
More options available.
Smith signature select 8 gpm indoor natural gas tankless water heater.
When choosing a tankless water heater the first thing you need to decide is if you want gas or electric.
For pricing and availability.
Neither type is inherently better.
Plus you never have to worry about running out of hot water with a rinnai tankless water heater because it keeps heating as long as it is needed.
Rheem rtgh 95xln prestige natural gas outdoor whole house low nox condensing tankless 9 5 gpm water heater 4 2 out of 5 stars 12 1 259 99 1 259.
This type of tankless gas hot water heater is a good option for replacing an existing tank type gas water heater because it can be configured to use the same venting as the tank.