What should I do if my home is too dry during heating season?

What this symptom usually means

A house that feels too dry during heating season usually has a winter humidity problem, not just a comfort problem. The furnace or heat pump is warming already-dry outdoor air, which lowers relative humidity indoors, and if a whole-home humidifier is not adding moisture correctly, the dryness shows up as static shocks, dry skin, scratchy throat, shrinking wood trim, or houseplants drying out faster. When the entire home is affected, the issue is often with the humidification system or overall air leakage; when only one room or zone feels dry, airflow balance, duct leakage, or a zone-specific control problem moves higher on the list.

How to tell the likely causes apart

Start with what you can observe, not what the thermostat says. If you have a portable hygrometer, indoor winter comfort is commonly around 30% to 40% relative humidity; many homes with this complaint are down near 15% to 25%. If the dryness began suddenly after recent service, a humidifier may have been left off, its water feed valve may be closed, or the humidistat setting may have been reduced. If it worsened gradually over weeks, the humidifier pad can mineral-load, the drain can clog, or the water solenoid can stop feeding enough water. If one bedroom, addition, or upstairs zone is much drier than the rest, suspect duct leakage, excess return air from outdoors, or poor supply balance to that area rather than a whole-house humidity control setting alone.

What you can safely check before booking service

You can safely confirm whether a whole-home humidifier exists on the ductwork near the furnace and whether its control is turned on. Check the humidistat setting and compare it to a separate hygrometer reading taken in the living area for a day or two. Around windows, some systems are intentionally set lower in very cold weather to prevent condensation, but if your measured humidity is staying below about 25% and the home feels uncomfortable, the humidifier likely is not keeping up or is not functioning correctly. Do not open electrical compartments or attempt repairs to solenoids, wiring, or furnace controls.

What a technician usually does on a service visit

For this symptom, a technician typically measures indoor relative humidity, checks the humidifier call signal during a heat cycle, verifies water flow, inspects the pad or canister condition, and confirms the drain is clear. They may test the humidistat calibration, inspect bypass dampers or steam unit operation, and look for duct leaks or airflow issues if only part of the home is affected. If the house is very leaky, they may also note that the HVAC equipment is working as designed but cannot hold winter humidity well until infiltration problems are addressed.

What affects repair cost

Cost depends heavily on whether the fix is basic humidifier maintenance or a larger comfort correction. Replacing a clogged water panel, cleaning a drain, or correcting a humidistat setting is usually on the lower end, while replacing a failed solenoid valve, humidistat, control board, or steam canister costs more. Typical 2025-2026 US service and repair pricing is often about $150-$350 for simple humidifier service, roughly $250-$700 for common component repairs, and around $600-$2,000+ if a whole-home humidifier needs replacement or a new system is being added. Duct sealing, airflow balancing, or air-leakage improvements can add separate costs because they address why the house keeps losing moisture.