The system with a tankless water heater will also be much more responsive have unlimited supply of hot water and clean water running through the floor heating pipes without sediments and other mineral build ups.
Can a tankless water heater be used for radiant floor heat.
It s also true that a tankless water heater is smaller and less expensive than a boiler or a furnace.
All water heaters waste heat energy even when the burner is off and the unit is sitting idle between heating cycles.
Granted the unit dedicated to heating the floor only wastes heat during the winter months.
However just because you can doesn t mean you should.
You really only need a maximum of 120 f for your floor.
Today tankless heaters are low cost high efficient units that are cheaper to maintain operate.
It s true that a tankless water heater can easily heat most single family homes.
The best tankless water heater for radiant floor heat is the takagi th3 natural gas.
We plumbed the radiant heating loop of our vacation cabin to the domestic hot water making an open loop system.
Ft lightweight 60 lbs can mount conveniently on a wall vent.
And the cheaper tankless heaters are usually not recommended or warranted by most manufacturers to be used in a radiant heating system and it will probably void your warranty.
Water heater for radiant heat water heaters are good for radiant floor heating because they maintain a low temperature.
They have become the standard heat sources for radiant heating applications.
We design radiant heating systems to suit the unique characteristics of tankless water heaters.
While most radiant systems get their hot water from either a tank type water heater or a cast iron boiler my home s heat and domestic hot water dhw are both provided by a single rinnai tankless or on demand water heater.
As such we rate it with 5 stars out of 5.
The rinnai uses considerably less energy than a tank type heater and costs less to install than a boiler with a heat exchanger.
The other consideration is efficiency.
This model has the most impressive flow rate it is well made and it comes with all you are going to need.
It is the safest choice as well.
A tankless hot water heater is ideal for this application since there is no water to be kept hot at all times.
The reasons are outlined below.
But standby losses for six months out of every year can add up.
The down side is two heat sources.
Dual purpose systems a dual purpose system relies on only one water heater to supply both the hot water requirements for the home and the warm water needed for the radiant floor heat.
You actually have a choice between them as you can use a water heater or tankless for radiant floor heating and not just a boiler.