Unico, Inc.

The National Trust for Historic Preservation is proud to partner with Unico, Inc., manufacturer of the Unico System Green Series. 

The Unico System is an energy efficient small-duct duct central heating and air-conditioning system. This system fits where conventional systems cannot and preserves the architectural integrity of any structure, making it the preferred method for providing older, historic, and architecturally unique homes with high-end central heating and air conditioning without marring the building’s original aesthetics. 

Unico has been a proud corporate partner of the National Trust for Historic Preservation since 2002.


Unico generously provided the heating and air-conditioning system for the restoration of President Lincoln's Cottage.  The Unico system was also used in the restoration of the Mark Twain House,  Booker T. Washington's house, and the Harry S. Truman Little White House.  Click to read the case study of the Unico System at the Truman White House.

Case Studies

To read examples of the Unico System installed in homes and businesses, click on a case study below to download more information.