The Holiday Inn Dayton Mall will change over to the Wyndham Garden Dayton South nameplate on Sept. 12.

The 134-room hotel will adopt the new name following a multimillion-dollar refurbishment.

The hotel is at the corner of Ohio 741 and 725 in Miami Twp.

The upgrades will cost between $2.5 million and $3 million, said Ron Monte, the hotel’s general manager. Crews began the work about six weeks ago, Monte said.

The improvements will include upgrades to the hotel’s guest rooms, business and fitness centers, gift shop, meeting spaces, restaurant and lounge.

The refurbished hotel will offer more than 10,000 square feet of meeting space and 8,000 square feet of foyer and atrium space for business functions, weddings and events, a news release from the hotel’s owner, Blue Cougar Dayton LLC, states.

Additionally, the full-service hotel also will have a ballroom able to accommodate up to 800 people. And the owners also plan to install oversized high-definition televisions, wired and wireless Internet access, granite countertops, new furnishings and other amenities.

Monte said the owners decided to make the changes to keep the hotel competitive.

“We have some nice properties on the south side of town,” he said. “We like to compete with them head to head.”

Blue Cougar acquired the hotel in July 2010, Monte said. Interstate Hotels and Resorts manages the property for Blue Cougar, he said. The hotel has 60 employees.