Radiant floor heating is a practical way to heat a concrete slab by circulating heated fluid through PEX tubing installed within or beneath the floor system. Instead of relying on forced air to distribute heat through a room, the floor becomes part of the heating system.

A properly designed radiant floor system typically includes several components working together. The PEX tubing carries the heated fluid, an appropriate heat source provides the heat, and insulation beneath the tubing helps direct heat toward the slab rather than allowing unnecessary heat loss into the ground.

Barn World offers Crete-Heat insulated floor panels, radiant heat PEX, electric boilers, and related equipment for radiant floor heating projects. See the current Radiant Floor Heating Systems at Barn World to compare the available components.

How Does Radiant Floor Heating Work?

Hydronic radiant floor heating uses tubing to circulate heated fluid through a floor. In a typical concrete-slab application, PEX tubing is installed according to the system design and connected to a heat source and distribution system.

When heated fluid moves through the tubing, heat is transferred to the surrounding slab. The concrete then releases that heat into the space above it.

The system is different from a conventional forced-air furnace because the floor itself becomes part of the heat-distribution system. That can be particularly useful in spaces with concrete floors, including garages, basements, shops, and other slab-on-grade applications.

What Are Crete-Heat Insulated Floor Panels?

Crete-Heat panels combine floor insulation with a system for positioning radiant heat tubing. The modular panels are designed to interlock and include a built-in vapor barrier and raised features that hold PEX tubing in place.

The panels are made from expanded polystyrene foam and are available in different thicknesses. The current Barn World selection includes 1-inch, 2-inch, and 3-inch panels, allowing the insulation level to be selected based on the requirements of the project.

The panels can be used with concrete flooring in applications such as basements, garages, and other new slab projects. The specific floor assembly, insulation requirements, concrete thickness, and installation method should be determined as part of the overall project design.

Why Insulation Matters in Radiant Floor Heating

Radiant floor heating works by directing heat toward the area you want to warm. Insulation beneath the heated floor helps reduce heat transfer into the ground and other areas outside the intended heated space.

Without adequate insulation, some of the heat produced by the system can be lost downward rather than contributing to the temperature of the slab and the room above it.

Crete-Heat panels provide insulation directly beneath the radiant tubing while also providing a surface designed to hold the tubing in position. The current panels are available with different insulation ratings based on thickness:

Panel Thickness	Insulation Rating
1 inch	R-6
2 inches	R-10
3 inches	R-15

The appropriate insulation thickness depends on the building, slab design, climate, local requirements, and overall heating plan.

Crete-Heat Panels Provide a Built-In Vapor Barrier

Another feature of the Crete-Heat panel system is the integrated vapor barrier. The current Barn World product information describes the panels as incorporating a vapor barrier into the panel rather than requiring a separate sheet of plastic for that function.

This integrated design is part of the panel system and can simplify the layout of the radiant tubing and insulation during installation. The complete floor assembly should still be designed according to applicable building requirements and the recommendations for the particular project.

Installing PEX Tubing in Crete-Heat Panels

PEX tubing carries the heated fluid through the floor. Crete-Heat panels include raised features designed to hold the tubing in place during installation.

The tubing layout is an important part of radiant floor system design. Loop length, spacing, heat requirements, manifold location, and the size of the area being heated all need to be considered when planning the system.

Barn World offers radiant heat PEX and 300-foot PEX tubing options as part of its current radiant heating selection. The appropriate tubing and loop configuration should be based on the requirements of the heating system being installed.

For a concrete slab, the tubing should be installed according to the system manufacturer's instructions and the requirements of the slab and building project.

Choosing the Right Crete-Heat Panel Thickness

Crete-Heat panels are available in three insulation thicknesses. A thicker panel provides a higher insulation rating, but the appropriate choice depends on the project rather than simply selecting the thickest option available.

Consider:

• Whether the floor is new construction or part of a retrofit
• The location of the slab
• Insulation requirements for the building
• Available floor depth
• Climate and ground conditions
• Building codes and project specifications
• The overall radiant heating system design

For a new construction project, it is especially useful to determine the floor assembly before concrete work begins so the insulation, tubing, manifolds, and heat source can all be incorporated into the design.

Electric Boilers for Radiant Floor Heating

The heat source is another major component of a hydronic radiant floor system. Barn World currently offers electric boilers designed for use with radiant floor heating systems.

The boiler heats the fluid that circulates through the PEX tubing. The tubing transfers that heat to the floor, while the floor distributes the heat into the space.

Barn World's current radiant heating collection includes electric boilers in multiple configurations. The appropriate boiler depends on the size and design of the heated area, electrical service, number of zones, and other system requirements.

How Large of an Area Can a Radiant Floor System Heat?

System size depends on more than square footage. Building insulation, climate, desired indoor temperature, slab construction, heat loss, tubing layout, and the heating source all affect the required system capacity.

The older Barn World system information listed several RMS configurations for areas ranging from approximately 350 to 1,800 square feet. Current product specifications should be reviewed when selecting equipment because product configurations and availability can change over time.

Larger buildings may require multiple heating zones or multiple heating units rather than treating the entire structure as one zone. A qualified heating professional can help determine the appropriate system size and configuration for a specific building.

Single-Zone and Multiple-Zone Radiant Heating

Not every building needs the same temperature throughout the entire floor. A garage, workshop, basement, and living area may have different heating requirements.

Dividing a system into zones can allow different areas to be controlled independently. The number of zones, tubing loops, manifolds, and boiler capacity should be coordinated during the system design.

Thermal separation between areas is also important when different zones are intended to operate at substantially different temperatures.

Where Can Radiant Floor Heating Be Used?

Radiant floor heating is commonly considered for spaces with concrete floors or other floor assemblies that can accommodate the tubing and heating system.

Potential applications include:

• Garages
• Basements
• Workshops
• Shops
• Home additions
• Greenhouses
• Slab-on-grade construction
• Other buildings designed for radiant floor heating

The current Barn World radiant heating collection specifically describes Crete-Heat panels and related equipment for applications including homes, garages, driveways, shops, basements, and other concrete-floor projects.

New Construction vs. Radiant Floor Heating Retrofits

Radiant heating is often easiest to incorporate when a new concrete slab is being planned because the insulation, tubing, manifold locations, and concrete placement can be coordinated from the beginning.

Retrofitting an existing building can be more complicated. Available floor height, insulation, finished-floor materials, structural considerations, and access to the existing slab all need to be evaluated.

Crete-Heat panels are designed as modular components, but the suitability of a particular installation depends on the existing floor and the proposed floor assembly.

Planning a Radiant Floor Heating System

A successful radiant heating project starts with the entire system rather than one individual component. The panels, tubing, heat source, controls, manifolds, insulation, and slab all need to work together.

Before purchasing equipment, determine:

• The total area to be heated
• How the building is insulated
• The required heating capacity
• Whether one or multiple zones are needed
• The appropriate PEX tubing and loop layout
• Where the manifolds and heat source will be located
• The available electrical service if using an electric boiler
• The proposed concrete and floor assembly

Having these details established before ordering equipment can help prevent mismatched components and unnecessary changes during installation.

Crete-Heat Radiant Floor Heating Components at Barn World

Barn World's current radiant floor heating selection includes the major components needed for several types of hydronic floor-heating projects. The collection includes Crete-Heat insulated floor panels, radiant heat PEX, 300-foot PEX tubing, a PEX Pal organizer, electric boilers, and propylene glycol.

The panels are available in three insulation thicknesses, while the other components can be selected according to the requirements of the heating system.

Because radiant heating systems need to be properly sized and configured, review the specifications for each component before ordering. For a new construction or major retrofit project, system design should be coordinated with the building plans and applicable requirements.

Frequently Asked Questions About Radiant Floor Heating

What is radiant floor heating?

Radiant floor heating uses tubing or another heating element within the floor assembly to transfer heat to the floor and surrounding space. Hydronic systems use heated fluid circulated through tubing such as PEX.

What are Crete-Heat panels used for?

Crete-Heat panels provide insulation beneath a radiant floor system while also providing a layout grid for holding PEX tubing in position. The panels include an integrated vapor barrier.

What thicknesses are Crete-Heat panels available in?

Barn World currently offers Crete-Heat insulated panels in 1-inch, 2-inch, and 3-inch thicknesses. Their listed insulation ratings are R-6, R-10, and R-15, respectively.

Does radiant floor heating require PEX tubing?

Hydronic radiant floor systems commonly use PEX tubing to circulate heated fluid through the floor. The appropriate tubing type, diameter, loop length, and layout depend on the specific system design.

Can radiant floor heating be used in a garage?

Yes. Radiant floor heating is commonly considered for garages and other spaces with concrete slabs. The floor assembly, insulation, heating capacity, and system design need to be appropriate for the building.

Can radiant floor heating be installed in a basement?

Yes. Hydronic radiant heating can be incorporated into a basement floor system when the slab and insulation design accommodate the tubing and other components.

How do I choose the right radiant floor heating system?

Start with the area being heated, building insulation, expected heat loss, floor construction, electrical requirements, number of zones, and desired heating capacity. These factors help determine the appropriate panels, tubing, boiler, and other components.

Explore Radiant Floor Heating at Barn World

Radiant floor heating is a system rather than a single product. Crete-Heat panels provide insulation and a way to position PEX tubing, while the tubing, boiler, manifolds, controls, and floor assembly complete the heating system.

Whether you are planning a new garage floor, basement, shop, home addition, or another concrete-floor project, start by determining the size and requirements of the space before selecting individual components.

Browse the Radiant Floor Heating Systems at Barn World to compare Crete-Heat panels, PEX tubing, electric boilers, and other radiant heating components.