FilterEasy, the Raleigh-based startup that offers air filter services for HVAC systems on a subscription basis, has closed on $6.9 million in new venture funding.

Triangle investors include:

  • NC State Endowment Fund
  • IDEA Fund Partners
  • Triangle Angel Partners
  • Cofounders Capital

Arsenal Venture Partners, which is based in Florida, led the round.

Other backers include RTP Capital Associates, Silicon Valley-based Azure Capital, and the venture group of Michael Olander Jr.’s MDO Holdings.

The funding was announced Tuesday.

Launched in 2014, the company has now raised more than $11 million in funding.

FilterEasy raised $3 million a year ago and a $1.2 million round in 2015.

Thad Tarkington, the CEO, and Kevin Barry, the  COO, founded the company while attending North Carolina State University.