Furnace humidifier. (Honeywell / January 13, 2014)

As part of a home's heating system, a humidifier regulates the moisture level to prevent dry conditions so that your family will not be susceptible to infections or dry, cracked skin. It works overtime during the winter to improve the air quality inside the home and create a comfortable environment. A humidifier can even lower your heating costs. You will find that moist air tends to feel warmer, so there's a good chance you can lower the thermostat setting and still be comfortable.

Furnace-mounted humidifiers have controls that monitor moisture that may cause mold and fungi to grow and rot wood. These units fill themselves from the house's water supply, so, except for an occasional cleaning, they are maintenance free.

A heating specialist will install a bypass, flow-through humidifier for $415, which includes the labor and material. If you have experience working with sheet metal, electricity and plumbing, you can do the job for $215, the cost of the unit. You will save 48 percent. If you have doubts, leave this job to a professional heating contractor with the necessary skills and experience. This job includes a rather intricate installation of the unit, cutting sheet metal and heating ducts, and adjusting the unit to work properly.

To find more DIY project costs and to post comments and questions, visit http://www.diyornot.com and http://www.m.diyornot.com on smartphones.

Pro Cost -- DIY Cost -- Pro time -- DIY Time -- DIY Savings -- Percent Saved

$415 -- $215 -- 3.0 -- 5.5 -- $200 -- 48 Percent