Canadian private equity firm Clairvest Group has invested $39.5 million in CRS Contractors Rental Supply, a provider of construction rental equipment and related merchandise. Founded in 2000, the company operates 21 locations in Ontario and employs over 270. CRS is looking to expand its product lines and continue to grow through acquisitions and opening new stores. Clairvest made the investment through its Clairvest Equity Partners IV fund, its sixth investment through the vehicle. Clairvest's portion of the investment is $10.6 million.