Families from North Carolina and Kansas were chosen as the winners of a home comfort makeover worth $15,000 from American Standard Heating & Air Conditioning.

Marina Shelest of Waxhaw, N.C., and her family received a new heating and cooling system, including an American Standard AccuClean whole-home air filtration system, from Dan King’s One Hour Air Conditioning & Heating in Charlotte, N.C.

Laura Lawson of Shawnee, Kan., received a new heating and cooling system from McIntosh Heating & Cooling of Independence, Mo., with support from authorized distributor O’Connor Co.

The Shelest family’s old air-conditioning unit was replaced with a new, more energy-efficient model and an AccuClean filtration system, which removes bacteria and viruses that might otherwise be in the home’s filtered air.

As a part of her prize package and overall home comfort system, Lawson also received an AccuClean unit, which Lawson said would hopefully help relieve her son’s asthma symptoms.

According to American Standard, the AccuClean system removes up to 99.98 percent of allergens and airborne particles from indoor filtered air.

The online giveaway was a part of a word-of-mouth campaign conducted by American Standard that targeted mothers in the Charlotte and Kansas City areas. Moms were invited to visit special Web sites to learn more about combating asthma and allergies, flu prevention and other topics.

The sites also provided home comfort tips from the host of public television program “Hannah, Help Me!” and American Standard Heating & Air Conditioning spokeswoman Hannah Keeley, and provided an online chat room for local moms to share and discuss their own home comfort solutions.

Manufacturer representatives said the giveaway was designed to help area families make their homes cleaner and more comfortable.

Shelest and Lawson were each selected at random to receive the grand prizes, each valued at $15,000 each, including installation and warranties.