Due to our dry winter weather, we use humidifiers to maintain our health and the appearance of hardwood floors. Most homes have a drum-type or drip-type humidifier mounted on the side of the furnace. It usually has an automatic water feed from a small line connected to a nearby water line. Over time, the repeated evaporation of water will leave mineral deposits in the humidifier. Dust circulating through the furnace will also deposit in the humidifier. This debris can create a breeding ground for various types of mould and bacteria so it’s important to clean the humidifier on Humidifiers During the spring and fall, relative humidity levels can be set around 35 - 40 per cent, should never be higher, and should be adjusted to 20 per cent during the coldest winter days. a monthly basis. A number of anti-scale products can simplify the cleaning process. If the unit has a float valve, make sure it opens and shuts down the flow of water to maintain the desired water level (unit will have a water line indicator). During the spring and fall, relative humidity levels can be set around 40 per cent but should be adjusted to 20 per cent during the coldest winter days. If ice or excessive condensation appears on your windows, reduce the humidity even more. INTERIOR CLIMATE CONTROL 113