Transfer plates in dry hydronic radiant heating are used to mimic the thermal mass of a poured structure.

• A. False
• B. True
• C. They reduce efficiency
• D. They increase noise

Answer: (B)

Transfer plates provide a store of heat near the living space, adding the warmth capacity that a poured concrete slab would normally supply. In a dry hydronic radiant system, there isn’t the heavy structural mass of a slab to absorb and slowly release heat. Water runs through tubing attached to the plates, and the metal plate itself has high heat capacity and good thermal conductivity. This lets the plate absorb heat when the system is on and release it gradually when the system cycles off, smoothing out temperature swings on the surface you feel and live with. The result is a steadier, more comfortable radiant surface and more stable boiler operation, since the heat is stored and released over a longer period rather than cycling rapidly. It’s not about reducing efficiency or creating more noise; it’s about adding thermal inertia to mimic the behavior of a poured structure.