GT Solar International, Inc. to Announce Fiscal Year 2009 First Quarter Results; Company Will Host Conference Call and Webcast on August 26, 2008

Business Wire, August 20, 2008

MERRIMACK, N.H. -- GT Solar International, Inc. (NASDAQ: SOLR) today announced it will release results for the period ended June 2008 after market close on Tuesday, August 26, 2008.

The Company will host a live conference call and web cast shortly afterward at 5:00 PM EDT on Tuesday, August 26, 2008. Tom Zarrella, President and Chief Executive Officer, and Bob Woodbury, Chief Financial Officer, will host the call.

To listen to the conference call, callers in the United States and Canada may dial 877-419-6603. International callers may dial 719-325-4890. All callers should enter access code 1997486. A link to the live audio web cast of the Company's earnings conference call may be found on the Company's website at http://www.gtsolar.com on the investor relations page.

Approximately two hours after the conclusion of the call, an audio replay of the call will be available. To listen to the replay, callers in the United States and Canada may dial 888-203-1112. Other international callers may dial 719-457-0820. All callers should enter access code 1997486. The replay will be available until midnight September 09, 2008.

About GT Solar International, Inc.

GT Solar International, Inc. (NASDAQ: SOLR) is a leading global provider of specialized manufacturing equipment and services essential for the production of photovoltaic wafers, cells and modules and polysilicon. The company's principal products are directional solidification systems and chemical vapor deposition reactors and related equipment.

Forward-Looking Statement

Some of the statements that we make in this press release are forward looking in nature. These statements are based on management's current expectations or beliefs. These forward looking statements are not a guarantee of performance and are subject to a number of uncertainties and other factors, many of which are outside our control, which could cause actual events to differ materially from those expressed or implied by the statements. These factors may include our inability to manage our expansion effectively, our dependence on a small number of customers and suppliers, our limited number of products, the possibility of product liability claims, our inability to protect our intellectual property rights, increased competition from other manufacturers of equipment for PV products, risks associated with doing business in foreign countries and various other risks as outlined in GT Solar International, Inc.'s filings with the Securities and Exchange Commission. Statements in this press release should be evaluated in light of these important factors. GT Solar International, Inc. is under no obligation to, and expressly disclaims any such obligation to, update or alter its forward-looking statements, whether as a result of new information, future events, or otherwise.