Residential Geothermal Loop


Geothermal Design Worksheets:

Right-Loop provides quick, easy and accurate geothermal loop designs that comply with all industry standards. Based on methods developed by the OSU Design Manual for the general method, ASHRAE Design Manual for fundamental calculations, Cavanaugh/Alabama for lake/pond calculations, and NRECA/OSU/EPRI for Slinky calculations. Right-Loop supports multiple single pipe and multi-pipe applications for trenches and wells, and supports a variety of antifreeze options including Propylene Glycol, Methanol, Ethanol and Potassium Acetate (Cryotech GS4 or equivalent).  View overview video.


Right-Loop is the digital version of the geothermal design worksheet. This program will design your geothermal system instantly, once the data set is completed. Right-Loop™ requires you to set your bin data and earth temperature cities, select your ground-source heat pump equipment and circulating pump, and set your equipment configuration and loop characteristics. (Right-Loop contains diffusivity and conductivity numbers for both ASHRAE and EPRI earth types, and supports custom diffusivity and conductivity from soil testing.) Once this is done, the program will do the calculations automatically.

Use Right-Loop to:

Size ground loops for residential geothermal systems.

Design the loop to meet the rated capacity or a targeted entering water temperature.

See the effects of using different loop lengths.

Maintain a customizable Reynolds Number minimum.

Utilize a built-in pump sizing worksheet.

Additional Technical Features

  • Handles parallel, series, horizontal and vertical loops, slinky and pond configurations
  • Computes water and anti-freeze volumes with Reynolds number (and a customized Reynolds number warning) for easy mixing for Propylene Glycol, Methanol, Potassium Acetate (GS4 or equivalent), water, and more.
  • Load calculations from Right-J® and Right-Draw® are read into Right-Loop automatically
  • Select equipment from a library, then pick the loop type and configuration
  • Extensive built-in library of tabular data, such as bin weather, earth temperature, and soil types (with those selected, Right-Loop calculates the remaining factors instantly)
  • Everything you need is built-in with Right-Loop
  • Full multi-zone capability allows one loop per zone or combined equipment on loops
  • Calculates the pump head and freezing temperatures for variable antifreeze percentages
  • Extensive picture library of loop configurations
  • Includes ground source equipment
  • Graphic display of loop length vs. EWT


Right-Loop is a fast, easy and accurate way to design your geothermal system, without the mental gymnastics of a manual Geothermal Design Worksheet.


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."