Hawaiian Arctic's certified and insured home-heating specialists help keep furnaces safely humming through the snowy season with cleaning, tune-up, and inspection services. Technicians engage in a thorough multistep cleaning and maintenance protocol, which usually takes about 30?60 minutes. Click here to see the cleaning, tune-up and inspection checklist. After staffers replace filters, tighten electrical connections, and scrutinize gas lines for leaks, homeowners take comfort in knowing that their furnace will be poised to spew loving warmth all winter. Carbon dioxide tests and installation of new filters, if necessary, require an extra cost, unless customers wish to recycle used coffee filters or once-prized 80s hair-band T-shirts.