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You can always contact us during business hours on our 800 number and speak with a person.

Radiantec Company

"Thanks for your help yesterday. The plumber and I added valves to the system and blew the air out. Our house (3600sq. ft. with 26 vaulted ceilings) heated up to a comfortable level in less than 12 hours. I went from disappointed to amazed." -Bob, OR
Hours of Operation
Monday-Friday 8-5   [EST]
Mailing Address
P.O. Box 1111
Lyndonville, VT 05851
Physical Address
1547 Industrial Parkway
St. Johnsbury, VT 05819
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General Questions (Use this option if you already have information by mail or have reviewed enough on the website and just have questions or comments:)
Individual Proposal/Quick Quote Form - You would like a specific proposal about your project:
Individual Proposal


Imitation is flattery; but sometimes it causes problems.
Radiantec is the original radiant heating company for the consumer.
Other companies have closely copied Radiantec,
but there are important differences in quality and support.

About Radiantec
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Technical Description
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Radiant Heat for Log Homes
Retrofit your Home
Solar Power Your System
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The Best Overall System
Engineered Tubing Benefits
Insulation and Heat Migration
Study of Heat Transfer Plates
US DOE Report
ASES paper
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The Best Overall System
Radiant Heating Systems
Closed System
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Open Direct System
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Tax Credits are Possible
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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.

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