Greensleeves designs and markets clean technology software. Its intelligent thermal energy management technology reduces the capital and operating cost of ground-source HVAC systems. This technology optimizes the use of multiple thermal energy harvesting, storage and distribution systems (Patents pending).

Greensleeves offers advanced geothermal borefield design, pumping and thermal energy management for commercial buildings. It incorporates a unique blend of engineering, controls and self-adapting software for ground-source heat pump HVAC systems. Greensleeves’ software is connected to energy modeling programs in use by 100s of thousands of engineers around the world and provides optimized ground-source heat exchanger design, then automatically generates custom control software for download, and finally, it continuously optimizes the control sequences based on actual building loads and heat exchanger performance. 

Now in Alpha Testing!

Check out a demonstration of our intelligent design software:   


The University of Findlay - Davis Street Addition
The Greensleeves system was selected for the Davis Street Addition because of its anticipated 50% energy cost reduction. Actual results indicate a savings of 56%, compared to a conventional HVAC system with a gas boiler (built to ASHRAE 90.1.2007 standards), equivalent to approximately $83,000 savings per year, and estimated maintenance savings of $7,500 per year. More...



Tim Daly Takes the Reins as Eastern Regional Sales Manager

The Greensleeves’ team is pleased to announce the newest addition to our sales team, Tim Daly, as the Eastern Regional Sales Manager.  Daly’s primary roles will be driving regional sales strategies to generate demand and achieve revenue objectives as well as training and supporting manufacturer’s representatives.

Daly has extensive experience in the HVAC market specifying, installing, and maintaining HVAC equipment found in central utility plants and mechanical rooms.  Over his impressive career, one of Tim’s many accomplishments was leading the renovation of six research buildings consisting of over 500,000 square feet for the Medical University of South Carolina.  Part of this project involved the right sizing of the HVAC system which helped contribute to a total annual energy savings of approximately $1 million.  This project provided the client with a 25% return on investment after taxes and a 4 year simple payback and was a 2009 award winner for Performance Contractor.

“Tim is an outstanding addition to our Greensleeves team as he brings a deep blend of HVAC and clean technology sales and management experience,” said Bob Braam, Greensleeves’ Senior Vice President, Sales.

Daly received his Bachelor’s in Mechanical Engineering from North Carolina State University and is ASHRAE certified.

Greensleeves LLC is excited to announce our new strategic relationship with Multistack. The new MultiGEO™ Powered by Greensleeves control option can now be ordered and embedded at the factory. MultiGEO™ offers:

  • A more Intelligent Solution. Intelligent design and operation offers significantly lower first costs due to borefield size reduction and better energy performance.
  • A sophisticated and intelligent borefield design tool. This tool can be used to optimize borefield size on new projects or retrofitted for existing and problematic fields.

Contact your Multistack rep to see how MultiGEO™ Powered by Greensleeves could optimize your geothermal system today.