The idea here is to prevent domestic water from getting contaminated by stale water that sits uncirculated in the heating system during the off season.
How to heat both my floor and separate domestic water.
Domestic hot water heaters do work but can only supply proper water temperatures for small areas.
The same water that ends up in your hot shower or dishwasher for example has passed through the floor first.
You can also cool your house with radiant flooring.
Above the air handler is a smaller box containing the cooling coil.
The two systems are basically tied together.
There are two common options for using a home s boiler for water heating.
The tankless water heater also provides domestic hot water.
The traditional boiler water may also be used for domestic hot water by directing the water through a separate integrated water heating unit before routing it to a fixture such as a faucet or shower.
The box on the floor lower right is an air handler that includes a copper heat exchange coil.
Your existing hvac system likely won t have enough capacity to heat an additional room.
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.
One option is to keep domestic hot water completely separate from water that s part of the heating system using a heat exchanger.
Hot water from the boiler is circulated through radiators or a hydronic heating system to warm the ambient air.
Explanation of high efficiency condensing boiler use for both hot water radiant floor heat and domestic hot water.
This space heating system is a hydro air system using a rheem tankless water heater seen on the left.
Even if only part of the home uses.
Adding a solar water heater to your house and using your domestic heater to heat the radiant floor in the addition works wonders and it s usually cheaper than adding another small hvac system.
The open system uses one heat source your domestic water heater to provide both floor heating and domestic hot water.