A Connecticut-based thermal technology firm that is working to create clean, reliable electricity has decided to make Westport its home.

GTherm, Inc., is leaving its office in Shelton and will relocated to 8,474-square-feet of office space on the second floor of 500 Post Road E. GTherm is planning to build power plants, using heat from "hot dry rocks" to produce clean, reliable electricity.

The space is leased by Terex Corp., a diversified global manufacturer that recently moved to larger quarters at Nyala Farms Office Park in Westport. GTHem signed a six-year sublease that takes it through Dec. 31, 2016, which coincides with the conclusion of the Terex lease.

The commercial real estate firms of CB Richard Ellis and John D. Hastings were involved in this transaction. Beth Chappel of CB Richard Ellis represented GTherm while Mark Holod and Ted Hampe of John D. Hastings were exclusive listing agents for Terex.

The entire third floor of 15,592 square feet remains available for sublease.