Excellent question. The answer is yes. A whole-house humidifier is a smart addition to any home. They help reduce air borne allergens, decrease your chance of catching common colds and flu in winter, and extend the life of your home furnishings, hardwood flooring, and just about everything else in your home by keeping the air in your home at the ideal humidity level of 35-50%.
Whole-House Humidifier Types
Every whole-house humidifier works the same in that they are installed directly into your present central heating and air conditioning system. They regulate the overall humidity in your home, and automatically add moisture to the system when your furnace or air conditioner kicks on. They differ only in how they introduce that moisture to the system. The three most common types are drum, flow-through, and spray mist humidifiers.
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Whole-House Humidifier Installation
Once you've chosen the type of humidifier for you home, it's time to start thinking about installation. To start with, check to make sure that the area where you plan to install your humidifier never drops below freezing during wintertime. A/C units and furnaces are often installed in basements and attics, meaning there is the possibility (especially in the attic) that the mercury could drop below freezing during winter months. Freezing temperatures and humidifiers don't mix because freezing water causes seals, pipes, and joints to fail. Other than checking against low temperatures, it's also important that you buy the correct sized unit for your home. That means figuring out the cubic footage of your home (length x width x height), and then looking for a whole-house humidifier that meets those needs.
Call a Contractor
Your best bet for proper installation and sizing is to contact an HVAC contractor about coming in to do the work for you. They'll be able to determine how large of unit you'll need, which model will work best for you, and where it's best to install it.