6 questions Intermediate


5 - High efficiency hydronic systems

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Q: The indoor climate in a building with hydronic cooling is better than in a building with a forced air system. Why?
A: Because the use of hydronic systems for removing sensible heat loads means that less air is needed, which results in lower air velocities, less draft, and less noise.
Q: How does radiant cooling in a room work?
A: A radiant ceiling or floor is a low temperature surface, which receives more heat radiation than it emits and thereby removes sensible heat loads. A radiant ceiling also absorbs heat by convection.
Q: What is the difference between sensible cooling and latent cooling?
A: Sensible cooling involves reduction in temperature while latent cooling involves removal of humidity from the air
Q: What influence does the introduction of radiant cooling systems have on other building services?
A: Air volumes, air handlers and air ducts can be reduced in size because radiant cooling systems take care of the sensible heat loads and a dedicated outdoor air systems can be introduced (DOAS).
Q: Hydronic systems take up much less space than forced air systems in a building. Why is that?
A: Because hydronic systems use water as the cooling media, and water can carry more energy than air. That means smaller systems are needed to transport the same amount of energy.
Q: The heat energy distribution costs of hydronic systems are about 1/10 of the cost of a forced air system. How come?
A: Because forced air systems need much more air volumes to transport the same amount of energy than is the case with water.