Radiant Technology Overview

Radiant Technology

A Centuries-old Concept

Radiant heating is hardly a new technology. In fact, it's been around since ancient Greek and Roman times, possibly longer. Evidence of ancient piping systems is found among the ruins of some of the world's oldest civilizations.

Modern Innovation
Using modern polymer solutions, REHAU has perfected the application of first century discoveries to twenty-first century homes and buildings. We've taken the premise of this relatively simple technology and developed a modern system that circulates warm water through a network of polymer pipes placed in the floor, wall or ceiling. Heat gently radiates to warm surfaces, objects and air in the room, creating a comfortable environment.

What Makes Radiant Heating Ideal for Human Comfort?
Science shows that heat emission from the human body occurs mainly via three mechanisms: radiation, evaporation and convection. Humans feel most comfortable when they can regulate at least 50% of their heat emission via radiation, and when their feet are warmer than their heads.

Radiant heating systems provide heat on the basis of low heating surface temperatures over a large area and an even air temperature distribution with mild, comfortable radiated energy. In contrast to conventional forced-air systems, a radiative equillibrium is generated between people and the surfaces throughout the room, more closely achieving the optimal thermal comfort level for occupants.

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How it Works

Warm Circulating Water
REHAU’s radiant heating systems work by circulating warm water through a network of pipes placed in the floor, wall or ceiling. Heat is gently radiated from the panel, warming the surfaces, objects and air in the room to create a comfortable environment.

The water for a radiant system can be warmed with boilers, geothermal heat pumps, solar collection systems and water heaters.

Our systems are compatible with hardwood, carpet, vinyl, ceramic, tile and natural stone floor coverings.


1. RAUPEX pipe
2. RAUPLATE joist space heating
3. RAUPANEL dry panel heating
4. PRO-BALANCE manifold

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Benefits

Benefits

Step onto a floor with REHAU radiant heating and experience comfort at its best. Heat is gently radiated through the space virtually eliminating cold spots and temperature fluctuations. Radiant heating is quiet, clean and economical, and works with a variety of heat sources and floor coverings. Other benefits include:

Increases Comfort
Step onto a floor with REHAU radiant heating and experience comfort at its best. Heat is gently radiated throughout the space, virtually eliminating cold spots and temperature fluctuations. A radiant heating system also keeps floors warm and dry.

Enhances Control
It’s easy to zone a radiant heating system using the REHAU PRO-BALANCE manifold combined with multiple thermostats. This allows you to adjust temperatures in a single room or a group of rooms, based on activity and usage levels. For example, a guest room can be kept at a lower temperature when not in use.

Offers Flexibility
Radiant heating can be used in floors, walls and ceilings and can be installed in a single room or throughout your home or building. There are no heaters, radiators or additional vents, so you’ll have more design freedom and open space. Radiant heating is a great choice for today’s open floor plans, especially in areas with high ceilings.

Improves Energy Efficiency
Radiant heating allows a thermostat to be set as much as 4ºF (2ºC) lower than it would be with traditional hot air systems without sacrificing comfort. These lower operating temperatures coupled with the superior heat transfer properties of water can reduce fuel consumption, potentially saving up to 30% per year in heating expenses. And since radiant heating can be used with a variety of heat sources including geothermal heat pumps, solar collection systems and condensing boiler technologies, additional savings are possible.

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Installation

There's a Radiant Design That Will Work for You

REHAU radiant heating is compatible with a variety of floor coverings, including hardwood, carpet, vinyl, ceramic, tile and natural stone.

Slab

Pipes can be installed within a normal concrete slab either on or below grade, usually with no design changes to the slab. It is very important to use the right amount of insulation under a heated slab for optimal efficiency and response time.

This wet installation method is ideally suited for basement floors, warehouses, utility buildings and large-scale commercial projects. This is a common installation method for new construction.

Overpour

Pipes can be installed above suspended wood floors and encased in a thin slab overpour, usually 1.5 in (38 mm) thick.


Joist Space

Aluminum heat transfer plates are installed directly under the subfloor to conduct heat from the pipes. Joist space installation is sometimes ideal for retrofit construction, since you don’t have to alter your flooring.

Dry Panel
Pipes are snapped into aluminum heat transfer panels placed on top of a suspended wood floor or existing slab. This system delivers the best efficiency and response time. It's also a great option for both retrofit and new construction because it has a low profile and is easy to install.

Radiant Walls and Ceilings

Floors aren't the only possibilities for radiant heating. With the proper design techniques, you can enjoy a highly effective radiant system when pipes are placed within a stud wall or ceiling. These other surfaces can provide a perfect solution for retrofit radiant systems and rooms with floor areas that are too small to provide sufficient heat.


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Components

Components

REHAU's radiant heating systems are built with our proprietary designs.



RAUPEX® O2 Barrier Pipe
RAUPEX O2 Barrier pipe is the main component in the REHAU radiant heating system. This durable yet flexible PEXa pipe offers enhanced temperature/pressure capabilities and long-term strength. The oxygen diffusion barrier protects iron and steel system components against corrosion.

PRO-BALANCE® Manifolds
PRO-BALANCE manifolds bring ease of installation, controllable flow rates and a professional look to hydronic applications. PRO-BALANCE manifolds come preassembled and are available in a wide range of outlets. They make zoning easy to achieve without additional piping.

REHAU Controls
REHAU offers a wide variety of electronic components for your radiant heating application. They combine accurate and steady temperature with the flexibility of room-to-room control.

Compression-sleeve System
Designed for use with RAUPEX pipes, compression-sleeve fittings have a larger inside diameter than typical PEX crimp ring fittings, resulting in superior flow characteristics and reduced pressure loss. Secure connections can easily be made even in tough weather conditions, providing you with reliability and proven performance.

RAUPLATE™ Joist Space Heating
RAUPLATE’s two-channel heat transfer plates are installed in the joist space below your floor. RAUPEX pipes are easily clipped into the channels in the aluminum plates to provide even distribution of warmth.

RAUPANEL™ Dry Panel Heating
REHAU’s low temperature RAUPANEL heating system is ideal for retrofit and new construction. Installed above the subfloor and just beneath the finished floor, extruded aluminum panels conduct heat from 3/8 in. RAUPEX pipe to provide even floor surface temperatures with low water temperatures.

 

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Radiant With Geothermal

A natural synergy...
If you’re considering using our RAUGEOground loop system, you’ll also want to look at radiant heating and cooling, and vice versa.There’s a natural synergy between the two.

Here's why: In order to provide comfortable room temperatures, radiant heating works well with relatively low water temperatures and radiant cooling works with moderate water temperatures. It’s precisely in these temperature ranges that your water-to-water geothermal heat pump operates most efficiently.

So, by combining RAUGEO with REHAU radiant heating and cooling, you’ll enjoy the greatest comfort at the lowest operating cost. You’ll also appreciate the reliability of REHAU quality components from the geothermal probe to your thermostat, including durable PEXa pipes, secure joints and manifolds with individually controlled circuits.

It could be all you need for total comfort.
In many cases, a properly designed geothermal-radiant system can provide enough energy to heat and cool your entire space even in extreme temperatures.

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