Because the slab installations will require less than 140 deg F water, it is safe to use a water heater to heat the radiant slabs. We will also be installing 2 separate water heaters; one to supply domestic hot water and a separate water heater to supply the radiant floor.
In fact an electric hot water tank can be used to heat a house with in-floor radiant and they are thousands of dollars cheaper than boilers, and if they fail cost very little to replace; also there is very little maintenance, which can be done by the homeowner.
how does hot water radiant work? Unlike forced-air heating, which works by blowing warm air through large ducts, a hydronic system uses a dedicated water heater or a boiler (or even your existing water heater) as a heat source. A circulating pump moves the hot water through the PEX tubing and back to the heater.
Also to know is, what temperature should radiant heat water be?
85 – 125 °F
What size tankless water heater do I need for radiant heat?
For example, if you are running 2 showers at the same time, you will need 5 gallons of hot water per minute from the tankless water heater. If you were running a shower and the washing machine at the same time, you would need 4.5 gallons per minute from the water heater.
Can you use a tankless water heater to heat your house?
It’s true that a tankless water heater can easily heat most single-family homes. It’s also true that a tankless water heater is smaller and less expensive than a boiler or a furnace. Systems that use a single heating appliance for both space heating and domestic hot water are called combi-systems (or combo-systems).
How do you control radiant floor heat?
Choose a thermostat designed specifically for radiant floor heating. Hardwood floor temperature limiting. Hardwood floors can dry out and suffer damage due to thermal expansion. Maintain a minimum floor temperature. Maintain comfort in rooms with large amounts of southern facing glass windows.
Is a tankless water heater the same as a boiler?
Boilers can be used to not only heat water, but also heat your home and even generate power. Boilers heat water very quickly, and like hot water heaters, are available in tanked and tankless versions. However, unlike hot water heaters, some boiler systems come with a hot water storage cylinder.
Can I use regular PEX for radiant heat?
Yes, PEX pipe is approved for radiant or hydronic heating applications. Since ferrous components are likely to be present in the system, it is important to use oxygen barrier PEX pipe to help prevent ferrous components from rusting.
Can a hot water heater be used as a boiler?
A water heater is a storage tank that, yes, heats water. The heat is either produced by burning gas or by using electricity. A boiler, on the other hand, can heat water that is used to heat the home and provide hot water. A different type of boiler can heat the water to the point it turns into steam.
Why are direct vent water heaters so expensive?
When using a direct vent water heater, water is heated by the heat of fuel combustion. A direct vent system typically results in lower water heating costs, because the exhaust gases are vented vertically, with no extra power required as is the case with the power vent water heater.
Is the water heater connected to the furnace?
Tank-type water heaters: Tank water heaters have been the standard choice for heating water for many years. The heat source can be electricity, natural gas, propane or fuel oil. In an immersed coil installation, the hot water tank contains a heat exchanger that is connected to a furnace, boiler, or heat pump.
What is the best way to heat water?
Some of the most efficient water heaters find creative sources of heat— such as other heating equipment, outside air, or the sun — to provide hot water with less fuel. These include heat pump water heaters, indirect water heaters, integrated space/water heaters, and solar water heaters. Heat pump water heaters.
How do I add water to my floor heating?
By holding the end of the discharge hose under water in the 5-gallon bucket, stray bubbles are impossible to miss. Close the shut off valve. Attach a second garden hose to the fill valve. You are now ready to purge the air out of zone #1. Using full house pressure or a powerful utility pump, flood the zone.
Should a hydronic heating system be flushed?
Flushing the hydronic system is important. The hydronic heating system should be flushed to remove and flux or solder that may be mixed in the water. This is only an example on flushing a system – actual piping would be different as a Primary Loop would be required and a Secondary Loop with Pump and maybe mixing valve.