The new Wi-Fi-enabled Filterscan air-filter monitor from CleanAlert digitally alerts contractors, building operators and homeowners when a filter needs servicing by measuring differential pressure changes in an HVAC system. This monitor — which has the ability to communicate air filter status to a personal computer, tablet or smartphone — is ideal for HVAC contractors servicing multiple residential communities, apartment buildings or national and regional contracts, company officials say.

CleanAlert LLC, 27 E. College St., Oberlin, OH 44074; (888) 414-3569; fax (440) 774-3895;