Understanding Hydronic Heating


What is Hydronic Heating?

Hydronic: Denoting a system of heating or cooling that involves transfer of heat by a circulating fluid (such as water or vapor) in a closed system of pipes.

Unsurpassed Comfort

The net result is a heating system that can efficiently heat a warehouse or a residence with ease. It is efficient, quiet, comfortable and heats the areas where we function. In addition as there is no air movement, thus hydronic heating has health benefits due to lower dust, bacteria, smell  and allergen transfer that forced air systems can move or generate.

In Hydronic heating systems it is efficient to move heat from where it is produced to where it is needed.

Heat is absorbed by the water at the heat source, and transported through pipes to where it is  released into a heated device or space. The devices can include  radiators, floors, walls, and air handlers.

Modern hydronic technology precisely  delivers heat when and where it is needed and typically is delivered as radiant heat..

Well designed and properly installed hydronic systems provide exceptional  comfort and energy efficiency for the life of the building.


In the case of DSH, solar heats the solar panels. As the absorber is surrounded by glass vacuum tubes, very little heat is lost to the outside, even in winter.

The heat is then transported intelligently to the pump station where a custom controller causes the pump station to delivers heat as required.

First, it looks at the Hot water tank/cylinder. (HWT) If solar is available it points the heat at the HWT, while at the same time providing some heat for the heating system.

Once the HWT is satisfied and if heat is demanded, the controller pumps heat to the in-floor heating system. 

Once HWT and heating are satisfied, all extra heat is pumped into the heat core storage system and stored for use later. If there is no sun, or other heat, and heat is demanded, heat is extracted in reverse order and pumped into the heating system. Stored heat does not heat the HWT.

If there is no heat in storage, and heating or HWT demands heat, then backup heat is automatically triggered maintaining a constant warmth adjustable by the owner on their DSH control tablet or their WiFI or network enabled smart device.


A building's rate of heat loss is affected by how that heat is replaced. Identical buildings, heated differently, can have significantly different rates of heat loss. Buildings with hydronic heating have consistently lower heating energy use than equivalent structures with for example,  forced-air heating systems.

Hydronic systems do not typically affect room air pressure when running, forced air systems do. This can result in pressure differential leaking heat at every envelope egress opportunity. It was found that air leakage rates averaged >25% higher and energy usage averaged >30%  in the same identical homes with forced-air heating.

Temperature stratification; warm air tends to rise toward the ceiling while cool air settles to the floor. The temperature differential can be highly significant. Stratification is worse in high ceilings. Maintaining comfortable air temperatures in the occupied regions of rooms that have a high degree of temperature stratification, leads to significantly higher air temperatures near the ceiling where it can lose much of its energy.

Hydronic systems like the DSH system,  transfer the majority of their heat energy by thermal radiation, reducing air temperature stratification. Much of the time heat can be maintained at lower air temperatures when an occupied space is radiantly heated. The net result is comfort as well as energy savings.

Zoned hydronic systems also allow owners to purposely keep some low use locations, at lower temperatures, which also lowers heat loss and reduces fuel consumption.

Hydronic systems have a long life expectancy with nominal but regular maintenance. In the case of the DSH system, the system requires a simple flush every 5 years and solar panel cleaning. Pumps are designed to last for many years.