Austin's municipal water contains calcium carbonate concentrations between 120 and 180 parts per million. This hardness level causes mineral scale to accumulate on humidifier pads and distribution pans within weeks. White dust appears on furniture near supply registers as the minerals become airborne. Flow-through humidifiers tolerate this better than drum-style units because fresh water constantly flushes the evaporator pad. We recommend installing a sediment filter on your humidifier water line if you receive water from the Highland Lakes system, which carries higher mineral loads during drought conditions when lake levels drop and concentrate dissolved solids.
Travis County requires backflow prevention on all humidifier water connections to protect municipal water supplies from contamination. This adds a vacuum breaker or check valve to your installation, which most national HVAC companies overlook until a building inspector flags it during new construction finals. All Pro HVAC Austin installs code-compliant backflow devices on every humidifier as standard practice. We pull permits for whole-house humidifier installations in jurisdictions that require them, and we schedule inspections to keep your project moving forward without delays or compliance issues that could affect your homeowner's insurance.