How Radiant Floor Heating Works: A Complete Guide

What Is Radiant Floor Heating?

Radiant floor heating is a method of warming your home by circulating hot water through a network of tubing installed beneath your floor surface. Unlike forced-air systems that blow heated air through ducts, radiant heating warms objects and people directly from the floor up.

How Does It Work?

A radiant floor heating system consists of three main components:

1. Boiler or Heat Source — Heats water to the desired temperature (typically 80–140°F depending on floor type)
2. PEX Tubing Network — Cross-linked polyethylene tubing installed in loops beneath the floor
3. Manifold & Controls — Distributes heated water to different zones and manages temperature

The heated water flows through the PEX tubing, warming the floor surface. The floor then radiates heat upward, warming everything in the room evenly — furniture, walls, and most importantly, you.

Why Is It More Efficient?

Radiant heating is 20–40% more efficient than forced-air systems for several reasons:

• No duct losses — Forced-air systems can lose 25–35% of heat energy through ductwork
• Lower operating temperatures — Radiant systems work at lower water temperatures than baseboard radiators
• Even heat distribution — No hot/cold spots means the thermostat can be set 2–4°F lower while maintaining comfort
• No air movement — Eliminates the wind-chill effect of forced air, so you feel warmer at lower temperatures

Types of Radiant Floor Heating

Hydronic (Water-Based)

The most common and efficient type. Hot water circulates through PEX tubing. Ideal for whole-house heating in new construction or major renovations.

Electric

Uses electric heating cables or mats beneath the floor. Best for single rooms like bathrooms or kitchens. Higher operating costs but lower installation costs.

Best Floor Types for Radiant Heat

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Need help deciding if radiant floor heating is right for your Orange County home? Contact us [blocked] for a free consultation or call (845) 800-9119.