FREQUENTLY ASKED QUESTIONS

• In what year and where was Hydrogenics incorporated?
  - Hydrogenics was incorporated in 1995 under the Canadian Business Corporations Act.

• What is Hydrogenics' trading symbol and on what exchanges does it trade?
  - HYGS on the Nasdaq national market; HYG on the Toronto Stock Exchange (TSE).

• On what date was Hydrogenics' Initial Public Offering (IPO)?
  - Hydrogenics? stock went public on October 27, 2000.

• How can I purchase shares in Hydrogenics?
  - The purchase of Hydrogenics stock can be arranged through a registered dealer.

• Does Hydrogenics pay a dividend?
  - Hydrogenics does not pay a dividend. As a high growth technology company, all earnings are re-invested in the company.

• What is Hydrogenics' fiscal year?
  - January 1 to December 31.

• When are Hydrogenics' financial reporting/earnings dates?
  - Annual earnings reports are as follows: - 1st Quarter, May 15 - 2nd Quarter, August 10 - 3rd Quarter, November 18 - 4th Quarter/Year End, tbd

• When is Hydrogenics' next Annual Meeting of Stockholders?
  - Hydrogenics' next annual meeting of shareholders will be in May 2008. Exact date to be confirmed.

• Who are Hydrogenics' independent auditors?
  - PricewaterhouseCoopers

• Who are Hydrogenics' outside legal counsel?
  - Osler, Hoskin & Harcourt LLP in Toronto and White & Case LLP in New York.

• How many people does Hydrogenics employ?
  - Approximately 270 employees.