For most climates, furnace-mounted whole house humidifiers manage the relative humidity levels in a home during the Winter. Most guidance states that a comfortable and healthy humidity is between 30 – 60%. While a properly maintained and adjusted humidifier can be beneficial, neglect and misuse can create serious indoor air quality issue rapidly. As inspectors, we are evaluating the apparent condition of the appliance. We also need to connect any dots to other problems that issues may be implying.
Cleanliness is paramount. Reservoir humidifiers have a basin of standing water which can be prone to mold growth. They must be serviced regularly. Drip or flow-through models are less problematic, but both types have media that must be kept free of mineral deposits to work effectively. Inspect for contamination in the water and the humidifier, and for scale buildup. Leaks are an obvious concern. They can damage the HVAC equipment and the surroundings. A leak into the air stream can cause serious health problems.
The humidifier is inoperative. This affects proper function. Hire an HVAC contractor to make the required repairs.
The humidifier is leaking. This is a potential health hazard. Hire an HVAC contractor to make the required repairs.
The humidifier is contaminated with biological build-up. This is a potential health issue. Contamination can be circulated into the home through the air distribution system. Hire an HVAC contractor to make the required repairs.
The humidifier’s drum pad is clogged with mineral deposits. This reduces the efficiency of the humidifier. Hire an HVAC contractor to make the required repairs.
The humidifier’s metal mesh is clogged with mineral deposits. This reduces the efficiency of the humidifier. Hire an HVAC contractor to make the required repairs.
The humidifier is corroded. This indicates a failing and unreliable system. Hire an HVAC contractor to make the required repairs.
The humidifier is installed over the furnace heat exchanger. In this location, a leaking humidifier can damage the furnace. Hire an HVAC contractor to make the required repairs.
