HVAC Balancing for Renters: Cardboard, Coils, and CFM

When Daniel and Hannah moved into their Jerusalem rental, the bedroom hit 28°C while the living room stayed cool. The landlord's technician suggested blocking vents with cardboard — but is that a real fix or a disaster waiting to happen? In this episode, we break down the physics of duct static pressure, CFM distribution, and the 20% rule for vent blocking. We explain why restricting airflow can freeze your evaporator coil, how ECM blowers differ from PSC motors, and why that cardboard solution might cost you more in repairs than it saves in comfort. Plus: register booster fans, magnetic vent covers, and adjustable dampening grilles — the renter-friendly fixes that actually work without damaging the system. Episode #901288 — open it directly at myweirdprompts.com/901288