Closed Loop Radiant Floor Heating Systems

Air vents remove any trapped air in the.

Closed loop radiant floor heating systems. I used zip ties to tie down the pex pipe. This i have personally seen being done around my neck of the woods. There are essentially two different methods using a hydronic radiant floor heating system an open loop or a closed loop process. The system requires an expansion tank.

Closed systems are familiar to code officials and contractors and they encounter little resistance. Radiantec recommends using a quality domestic water heater instead of a boiler in underfloor radiant heating systems. If they decide that one system should be set up to run the homes radiant floor heating and potable services than an open loop system is required. In an open loop process the water is pulled from a source such as well heated and pumped once through the system before being discarded.

Manifolds and control systems connected to in floor radiant heating. As per the diagram plan all the pipes end in the utility core to be attached to the radiant floor system inside. Types of hydronic floor heating systems image credit. You can combine a closed radiant system with baseboard radiators.

Since most conventional boilers are designed to produce super hot water 185 degrees radiant floor company builds what we call split manifolds for multiple zone closed systems that use radiant floor heat in combination with standard baseboard radiators fan coils cast iron radiators or any other hydronic heating device that requires super hot temperatures. The above procedure can be followed to eliminate all air from the system. Pex tubing is flexible easy to install and provides all the characteristics one would need to create a successful open loop or closed loop. Closed loop and open loop systems will remain at the foundation of any radiant heating system.

Alternately a utility transfer pump not a sump pump can be used to pump fluid into the system and evacuate the air we recommend a powerful utility pump like the wayne ec 50 or the wayne pc 4 or an equivalent pump like the utilitech 5 hp cast iron transfer pump all of which can generate up to 45 psi. If you want to create an argument amongst radiant floor heat installers bring up the subject of open radiant heat systems. These are only a few basic systems. Several decades ago pex replaced polybutylene pb in open loop and closed loop radiant heating installations and the landscape of geothermal heating systems changed forever.

Each length of pex begins in the utility core makes its circuit around its designated zone and comes back so that it will circulate the water in a closed loop heat system. Many reasons have contributed to this evolution but the change was inevitable.