The benefits of using an HVAC humidifier include increasing the comfort of occupants, reducing dust and allergens in the air, and helping to protect wood furniture and floors from cracking or warping due to dry air. Additionally, a properly functioning HVAC humidifier can help reduce energy costs as it allows the HVAC system to operate more efficiently. By maintaining a optimal humidity level, humidifiers can also prevent dry skin, nosebleeds, and respiratory issues.