A whole-house humidifier is an appliance developed to increase humidity in the atmosphere of a home. These are merely larger, more complex versions of single-room humidifiers, which are too small and focused on spreading humidity throughout any rooms but the one in which it is located. To work on a larger scale, whole-house humidifiers are typically hooked up to a home's HVAC system, which in turn spreads the humidifying air throughout the home by way of the air conditioning vents.
Electronic air Cleaners
Traditional air filters work by passing the air through a fine filter, which traps particles while allowing the air to flow. An electric air cleaner works differently. It uses electricity to eliminate small particles such as dust, mold, and pollen from the air. Because an electric air cleaner has no filter, it has no parts that need to be replaced. Like other types of air purifiers, however, electric cleaners do occasionally need to be cleaned.
When accommodating a large dwelling, it's a good idea to zone your forced-air HVAC system to ensure proper air circulation and reasonable temperature settings. The second story of a multi-story building tends to have extreme temperature differences from the first floor if not properly controlled by a forced-air HVAC system.