Radiant In-Floor



Right-Radiant® is an easy-to-use program which combines industry standard ASHRAE calculation methods and field proven design techniques to provide a comprehensive radiant design and calculation tool, used to lay-out, size, and calculate in-floor radiant heating systems. View overview video.



In conjunction with Right-Draw®, Right-Radiant® is a comprehensive CAD-Quality radiant design and calculation tool. It contains the complete ASHRAE list of floor covering R-values and supports variable covering of loops. With our exclusive Hotlink technology, Right-Radiant® will adapt the radiant design drawing instantly as you enter or change the parameters.

Use Right-Radiant® to:

Drag-and-drop radiant panels to your rooms in Right-Draw®. Interactive in its design, once you drag a radiant panel into a room, select a layout, and connect it to a manifold, Right-Radiant® will layout the pex in a variety of patterns (1,2 and 3-way serpentine, perimeter, outside wall tightly spaced with serpentine, counter-flow spiral, et cetera). It will also slow switchbacks in the layout for equal lengths, calculate flow rate, head pressure, loop length, surface temperature, delta-t, and back-loss, as well as calculate output and tells you where supplemental heat may be needed.

Automatically design and layout radiant loops with a single mouse click. Right-Radiant® relies on industry standard conventions for spacing, manifold connections, your load calculation and bill of materials to create your loop design instantly for you.

Calculate flow rates, loop lengths, loop layouts, and head pressures, even where supplemental heat is required. Each panel and loop is also customizable to suit any specific project parameters.

Design snow and ice-melt radiant designs. Developed in partnership with a consortium of radiant panel manufacturers, Right-Radiant® offers more than just indoor heating capabilities, including sidewalks, driveways and more.

Estimate costs through "Quick Quote" within Right-Radiant® without drawing a floor plan. The Quick Quote mode was designed for a first pass assessment, a design-free way to estimate a project, complete with a bill of materials. View a sample Right-Radiant® report.

Create an instant bill of materials. Use Right-Radiant® in conjunction with Right-Proposal® to create a parts takeoff.

Store preferences for future jobs. Right-Radiant®, like most other Right-Suite Universal products, has the ability to save common properties within the preferences library to use for future projects.

Write the radiant layout to a CAD file. You may use this feature if you imported a CAD file first.

Additional Technical Features

  • Connected calculations offer greater accuracy and time-saving benefits for the designer. In fact, they never have to leave the actual program with all the calculations linked to the drawing, data never has to be extracted to alter.
  • Easy to use module integrates with other Right-Suite® Universal modules.
  • Generate an exact piping layout diagram from manifold to loops, complete with an accurate bill of materials.
  • Snow Melt capabilities.
  • Simply add panels and connect manifolds, all other calculations are based on preset preferences and the load calculation from your floorplan.
  • Calculates flow rates, loop lengths, loop layouts, and head pressures, even where supplemental heat is required.
  • Customizable parameters for each panel and loop.
  • Any modification to the preferences simultaneously updates the drawing itself via the Hotlink Technology™ These instant adjustments allow the contractor to play the "what if?" game, and quickly adapt to changes based on customer preferences.
  • Save common properties within your preference library for future jobs.
  • Estimate costs through "Quick Quote" without drawing a floor plan. The Quick Quote mode was designed for a first pass assessment, a design-free way to estimate a project, complete with a bill of materials.
  • Trusted by leading manufacturers including Uponor (Wirsbo), Roth and Zurn.


Eliminate the need for additional radiant drawing products, save time and improve layout quality with this all-in-one program. Connected calculations from loads to material types guarantees greater accuracy and allows the designer to play the "what if?" game, and quickly adapt to changes based on customer preferences.


Rick Blair Certified Home Energy Rater & Thermographer, Performance Point, LLC says,

"If you're a Wrightsoft user and have been wanting to go to the next level, Right-CAD is it. I'm not conversant with CAD but I was up and running with 3D almost immediately, importing some of my more complex duct designs already created with RSU, and amazed at seeing what I could only imagine before. The 3rd dimension takes the guesswork out of interstitial duct runs, navigating dropped ceiling areas, dropped girders, etc.

Learning curve is simplified by utilizing the familiar tools & tabs already within RSU, and yet with lots of bells and whistles for rainy day exploration and further fine tuning of design presentation. I see this as the future of professional & field ready HVAC design, without the cost and lengthy learning curve of Revit."

Mac owner of Michigan Energy says,

"This company is awesome. The software is pretty easy to use given it's complexity but the real benefit is the service.

Tech support is friendly and patient, the 10 day training course was perfect for a novice user and the trainer was open and understanding - the kind that doesn't make you feel stupid and knows his stuff so well he can explain why the software is doing what it is doing.

A great overall experience!"

Roquey from Integrity Comfort Solutions says,

"I have used Wrightsoft since the days of monochromatic screens and the spreadsheet-only format. I've attended several classes, been to the World Headquarters in Lexington, and even hosted training classes. The level of support is phenomenal. Both in the classroom, call in and email.

I've used the Right J, Right Draw modules extensively in the new construction markets not only for the purpose intended, but also to "value engineer" the materials selection process for my clients. I can't imagine a better product. The learning curve is pronounced and requires commitment on the part of the user, but with constant use it becomes almost second nature.

As a 40+ year veteran of our industry, I highly recommend this company."

Mike Douglas, from Advent Air Conditioning says,

"As a business owner, one of the things I like is that Right-Draw gives us a level of professionalism whether it’s a specialty home or a basic starter home. Within the past year, we have actually picked up new accounts because our customers were so impressed by the professionalism of our designs, particularly when we go up against contractors who are giving them what amounts to a crayon rendition on a napkin."

Bob Pietrangelo from Comfort Solution says,

"I’ve always been a proponent of proper sizing of air conditioning equipment. For a standard 3,000 square foot, 4 bedroom house, doing the load calculations manually would take many hours. Then I found Wrightsoft, and by using their Right-J and Right-D, I was able to produce load calculations and duct design in about an hour."

Al Gagne from Bayside Mechanical says,

On our Training:
"I've been to three of your trainings over the last 7 years and every time I go I learn something new. The class provides a thorough understanding of Right-Suite® Universal and helpful shortcuts so that I can continue to run my business effectively in this changing market."

On our Software:
"Wrightsoft’s Right-Suite® Universal has helped us to turn bids around faster, especially for custom home builders. I can simply import the AutoCAD building plans as a layer in the program, trace to complete the load calculations and add my ducts to the design, saving me a considerable amount of time. The full design and calculation is then saved in the AutoCAD file as another layer."

Mike Truitt Resnet Rater from This Efficient House says,

“Hands down, the best tool for the job. Our HVAC partners love the 2-line mode drawings, and the export to REM/Rate module saves me at least 2 hours per project! That's a real game changer for us in terms of billable hours and revenue. Mike (sales) and Donald (tech support) have been there for us for over 10 years! Keep up the good work and thanks again guys. - Just another loyal happy customer.”

Jim Heinz President of Heinz Air Conditioning and Heating, Inc. says,

“We are primarily a residential replacement air conditioning and heating company in Clearwater, Florida.  We found a serious issue with improperly sized air conditioning systems in existing homes that was causing issues with humidity, or lack of cooling.  We have used Manual J for over 30 years, but due to the time-consuming process of entering information manually, it was not done unless we had a consumer complaint.  We partnered with Wrightsoft over 15 years ago and can now do a Manual J Load Calculation in less than 30 minutes. Wrightsoft is always there for us, with tech support staff that answers the phone quickly, and offer advice when needed.  There is also a library of how to videos available 24 hours a day on their website. Wrightsoft has continued to be the best option for us for Manual J load calculations.”

Tim Kohut Director of Sustainable Design, National Community Renaissance says,

“I reached out to technical support [to complete an advanced task].  [Technical support] responded within an hour or two, guided me through the process, and even QC’d my spreadsheet (making corrections needed).  I was really impressed… I’ve found that my questions are always answered, usually within hours, and there’s never an attempt to dodge an issue. Wrightsoft’s responsiveness on the support side is what truly sets you apart.  Your team has made my life easier and using RSU has become an integral cornerstone to the work I do guiding our teams in the design and construction of high performance, soon to be ZNE affordable housing.”

Steve Paxton from Air-Dynamics says,

“I've been using Wrightsoft since the late 80’s. Public Service Company in Oklahoma's "Good Cents" program required an ACCA Manual J load calculation and ACCA Manual D duct design to qualify as a "Good Cents" structure. As long as the information is entered correctly, Wrightsoft takes all of the guesswork out of the equation. It has given me peace of mind and keeps our quality of installation above the rest. I can't imagine doing an install without it, it's as important to us as the rest of the tools on our trucks.”

Tom Tumminelli from Brothers Plumbing, Air & Electric says,

“The Wrightsoft experience has been great from the beginning to end.  Their support staff are patient and professional.  Proper equipment sizing is imperative regarding our customers comfort. We have been able to provide our customers with accurate professional data to backup our proposals awarding us multiple projects over our competitors. Well worth the investment of time and money.”