How it works

From the boiler to your floor — one quiet, even loop of warm fluid

Hydronic radiant heating circulates a warm fluid — usually water, often blended with antifreeze (propylene glycol) — through a sealed loop: the boiler heats it, a mixing valve tempers it, a pump circulates it, a manifold splits it across the floor, and tubing in the slab warms the whole room from the floor up. Step through each part below.

This is a simplified overview. A complete installation also includes safety and control components — a pressure-relief valve, air separator and vents, a fill/pressure-reducing valve, and a backflow preventer — and the exact mixing and piping method varies by home. Every component is sized to your space: heat-loss calculations, water temperature, loop lengths and flow rates, pump head, and tank sizing are all engineered by your Phillips Hydronics installer. It’s precise work — and exactly why it’s done by a professional.