Modern HVAC Designed for Historic Preservations
The Unico System delivers efficient heating and cooling without compromising a home’s original charm. Its small, flexible ducts and compact air handlers allow for installation within tight spaces such as wall cavities, ceilings, and floors. With nearly invisible vents and minimal impact on existing architecture, it preserves the integrity of historic structures while providing consistent, modern comfort.
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Benefits of The Unico System
Ideal for historic homes. Small ducts fit in most homes without major renovations. Air supply tubing is flexible and can be inserted into existing tight spaces. This makes mini ducts the best choice for historic or older homes where you want to maintain the home’s character and want your heating system to have minimal visual impact.
No more dry air: The Unico System is a closed system that warms air from within your home without drying it out. It’s not just comfort – the humidity also keeps your family healthy. No more dry air means you can say goodbye to uncomfortable dry skin and sinuses, making you more susceptible to viruses and other contagions.
Whisper-quiet: Unico System customers often forget their system is running because it’s whisper quiet. Engineered with special sound-absorbing air supply tubing meaning there’s no creaking or vibrating when the system turns on.
Supported by Old House Journal and Arts & Crafts Homes as a premier choice for small-duct HVAC in historic and home preservation.
Old House Journal helps you restore, repair, update, and decorate your home. Find how-to stories, design ideas, and hard-to-find products.


Free System Design Service
Let us do the hard part.
For every project design we complete, we provide a PDF system design with an estimated placement for ductwork and outlets. Additionally, a complete design will provide a full material list for your project list for your project.