San Antonio's Edwards Aquifer water tests between 12 and 18 grains per gallon hardness, which classifies as hard to very hard. When you run a furnace humidifier, that mineral content accumulates on evaporator pads and steam electrodes faster than in soft-water regions. A bypass humidifier in Dallas might go two winters on one water panel. In San Antonio, you replace it annually. Steam units with self-flushing cycles handle the calcium better, but even those need periodic descaling to maintain full output. Ignoring maintenance leads to white dust on furniture, reduced humidity output, and eventual component failure.
San Antonio's heating season runs from late November through February, with occasional cold snaps into March. During those months, your furnace pulls outdoor air into the return duct, heats it, and distributes it through your home. Heated air loses relative humidity, dropping indoor levels below 30 percent without supplemental moisture. That dryness stresses respiratory systems, damages wood furnishings, and increases heating costs because dry air feels colder. A properly sized HVAC humidifier integrated with your existing system solves this without the maintenance burden of portable units or the energy waste of boiling water on the stove.
