Take a look at noritz tankless gas water heaters and boilers.
Can i replace my boiler with a tankless water heater.
Tankless water heater to replace boiler in recirc heating system.
Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models.
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Noritz offers a couple of asme models.
Now that you have decided to replace your tank hot water heater with a tankless hot water heater you will be saving as much as 100 or more annually on your water heating bills.
Noritz boilers are designed to be a boiler.
You can replace your boiler with an electric instant water heater which requires no tank.
But really your problem is that your heating system is old old boilers run at about 65 efficiency i e.
For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating.
Generally a homeowner can replace an existing water heater themselves but should obtain a permit.
All of the tankless heaters designed for hydronic heating should have the asme designation.
Why it was a good choice to replace our old propane water heaters and the steps we took to convert our old gas propane water heaters to electric tankless water heaters.
This ef rating is based on test procedures developed by the u s.
I know if you use a noritz tankless gas water heater as a boiler the warranty on the heat exchanger goes from 12 years down to 3 years.
I m planning on using a noritz condensing tankless hot water heater as a boiler for my hydronic heating system.
The safest way to know what your local building department requires is a quick call or visit to the department.
I saw a couple of others but do not remember the brands.
I need to install a tankless water heater to take the place of the boiler in a recurculating hot water heating system.
I am looking to do the same thing replace my 30 year old boiler with a tankless boiler.
Tankless water heaters are designed to heat cold water for domestic use.