Second Nature, the US-based operator of an air filter rental service, has raised $16.4m in a series C round backed by filtration equipment supplier Mann+Hummel’s corporate venturing team, TechCrunch has reported.
The round included Carolina Angel Network and Wolfpack Investor Network, angel investment affiliates of University of North Carolina at Chapel Hill and North Carolina State University, as well as Arsenal Growth, Lead Edge Capital, Bonaventures Capital, Idea Fund Partners, One Better Ventures and Multiplier Capital.
Founded in 2012 as FilterEasy, Second Nature offers a subscription service that provides regular deliveries of air filters used to remove toxins like dust from indoor environments.
The service was initially directly aimed at consumers but now also supplies property agents, utilities and manufacturers of heating, ventilation and air conditioning systems.
Second Nature will expand its product range during Q2 2020 to include refrigerator water filters but has lost some subscriptions from commercial properties since the coronavirus crisis began.
The company has now raised $34.7m in funding having closed a $6.9m series B1 round in late 2018 that was led by One Better Ventures and backed by Lead Edge Capital.
The round followed a 2017 series B round also sized at $6.9m that was led by Arsenal Venture Partners with contributions from NC State’s Endowment Fund, Idea Fund, Bonaventure Capital, Cofounders Capital, Triangle Angel Partners,Azure Capital, RTP Capital, MDO Holdings and private investor John Replogle.
Second Nature had already received $4.2m of equity funding from undisclosed investors in 2016, according to a regulatory filing, following $1.5m in a 2015 seed round led by Azure Capital that included RTP Capital and unnamed angel investors.