Riverside-backed Threshold Brands, a multi-brand franchisor of trade service concepts, completed the acquisition of Plumbing Heating Paramedics, which provides HVAC system repairs. Financial terms were not disclosed. "The addition of PHP is a natural fit for our continued expansion of the Threshold Brands platform, allowing us to serve more customers and geographic footprints. Riverside’s investment in PHP is the most recent example of the firm’s commitment to our franchise platform and an integral step in extending into the HVAC and plumbing end markets," Loren Schlachet, Riverside Managing Partner.