7 rheem rtgh 84xln outdoor natural gas condensing tankless water heater.
Gas water heater efficiency rating.
But also comes with a 12 year warranty for the heat exchanger 5 year parts warranty and a year warranty for labor making this perhaps the best residential water heater on the planet.
Check our gas and electric water heater ratings for more.
Exploring water heater options by fuel type.
It comes with an impressive energy factor of 0 82.
Not only does this water heater have a gas rate input of 15 200 to 199 000 btus.
Typically electric water heaters are similar to gas water heaters in efficiency.
Due to inconsistent unreliable interpretations of high efficiency ef ratings across national brands all water heating manufactururers are now required to comply with the new doe testing procedures and rating standards.
The following is a list of water heater options by fuel or energy source.
However the cost of electricity makes their operating cost higher.
Products must meet minimum requirements for energy efficiency hot water delivery warranty period and safety.
The unit has an ef of 0 93 for natural gas or propane up to 94 percent thermal efficiency and an energy star rating.
This is another top quality gas water heater that you can get for the house right now.
It is made to be impressive in terms of energy efficiency.
Learn how a product earns the label.
The price of an electric water heater varies.
Water heater key product criteria.
As the result of recently updated efficiency standards water heaters under 55 gallons now have a 4 percent boost in efficiency while.
High efficiency water heaters especially gas powered tankless units often require retrofitting your plumbing and a new venting system as most.
To help consumers in their water heater purchase decisions the department of energy has developed new industry standards.
The specification covers high efficiency gas storage whole home gas tankless solar and high efficiency electric storage water heaters.
Ef is determined by the department of energy s test method outlined in the 10 cfr parts 200 to 499 edition revised as of january 1 2014.
Buying a water heater.
The fuel used by a water heating system will not only affect annual operation costs but also the water heater s size and energy efficiency.
An older measure of water heater overall efficiency that is being phased out due to new test methods for water heaters.
It also has a maximum btu of 199 000 and can produce 9 8 gallons per minute.
