Humidifiers are usually used to help offset the drying effect that furnaces have during the cold months. As an added benefit, having a humidifier in your home can help save energy costs. Heating bills can be reduced because adding moisture back into the air can allow the air to feel warmer and more comfortable at a lower temperature. In other words, humidified air feels warmer than dry air. Humidifiers are also good for those prone to sinus infections or respiratory conditions such as asthma and allergies.