CSLB C-20 license #526487 backs Casablanca Heating & Air Conditioning, a sole-operator HVAC company run by Cass Anderson out of a Santa Cruz Avenue address in OB. Service calls frequently arrive via direct referral from Call Glenn Again Handyman and Home Services, which routes complex HVAC diagnostics over to Cass rather than attempting them in-house. Much of the work involves rescuing prior installations — faulty ductwork, mismatched tonnage, and refrigerant-charge errors left behind by earlier contractors on older Point Loma and Ocean Beach homes. Furnace replacements in 1940s-era OB bungalows typically require new flue routing, combustion-air makeup sizing, and a return-air drop cut into tight lath-and-plaster walls. When condenser replacement calls for a new disconnect or a 240V circuit upgrade, the job coordinates with a C-10 electrician such as ZED Electric to keep permit-counter paperwork clean. The most demanding jobs are full system swaps on salt-exposed coastal properties where corroded line sets, undersized plenums, and outdated Title 24 compliance all need addressing in a single project window.