Radiantec Logo
Sunset over Solar Panels

printer friendly version

Call Toll Free 1(800)451-7593

Get your Free Quote Today!

Solar Power Your Radiant System

Find us on Facebook
free quote here

What Is The “Best” System?

There are many ways to make the warm water that will go through the tubing beneath your floor, and we are constantly asked for our advice about which is best.


Here are the Important Considerations (Not Necessarily in Order)

  • The system should be efficient. It should not cost a lot to operate.

    Why is the open direct system so energy efficient?

    1. The open direct system is a combination system getting two uses out of one unit. Stand-by losses of two units are avoided.
    2. The money saved from not buying a boiler can be used to acquire a high-quality condensing water like the Polaris.
    3. The overall low temperature of the unit improves efficiency.
    4. Radiant heating is the most efficient heat delivery system.
    5. The overall simplicity of the unit means that parasitic electrical pumping cost is minimal.
    6. The flow of cold make-up water through the floor reduces the cooling load in the summer.
    7. This nuisance heat is delivered to the domestic water heater where it becomes an energy saving benefit.
    8. The open direct system is appropriate for solar energy assistance.

  • The system should have reasonable capital costs. It should not cost too much to buy in the first place.
  • It should be simple. It should be easy to install and easy to fix.
    The parts should be easy to come by, and it should not take a specialist to do the work.
  • It should last a very long time.
  • Some of us will want this energy choice to be environmentally responsible. There should be a minimum of pollution. It should save energy so that our children and grandchildren will have something to use in the future. If possible and if practical, it should be convertible to solar heat

For these reasons, it is our opinion that the Open Direct System is the best choice.

Click here if you want more information about the Open Direct System

Diagram of Open Direct Heating System

Legend for Diagram of Open Direct Heating System

Photo of Open Direct Systam




Click here to learn about the environmental benefits of Radiantec systems.

About Radiantec
Radiantec Qualifications
Customer Support
A+ BBB Rating
Quote Cover Letter
Take the Next Step
Request a Brochure
Quick Quote Form
Full Quote Form
Customer Testimonials
Installation Packages
Installation Manuals
About our Products
Freq Asked Questions
Why Radiant Heat
Technical Description
Environmental Benefits
Radiant Heat for Log Homes
Retrofit your Home
Solar Power Your System
Radiantec R & D
The Best Overall System
Engineered Tubing Benefits
Insulation and Heat Migration
Study of Heat Transfer Plates
US DOE Report
ASES paper
Our Heating Systems
The Best Overall System
Radiant Heating Systems
Closed System
Indirect System
Open Direct System
Water Heater heat source
Going Solar - Free Energy!
Cost Saving Benefits
Environmental Benefits

Installation Manuals

About Building Codes
Problems w/a code official?
Shop Online
About our Selection
Pricing Information
Do It Yourself
Installation Packages
Individual Component Prices
Ballpark Estimates
Sample Project Cost
Quick Quote Form
Full Quote Form
Tax Credits are Possible
ICC ES Evaluation Report
Installation Manuals
Design & Construction Manual
Open Direct System
Installing the Closed System
Installing the Indirect System
Installing tubing for a concrete slab
Installing tubing between floor joists
Installing tubing in the ceiling
Installing tubing in the walls
Installing a heated towel rack
Installing Radiantec Controls
Doing your own tubing layout.
Radiantec Basic Solar Domestic
   Water Heater Installation Manual.

Radiantec Basic Solar Domestic
   Water Heater Owners Manual.

tubing background