HVAC & Retrofit Systems

products & services directory

Old House Online's Directory of suppliers and installers of HVAC and retrofit systems for classically-designed or older homes. Specialties include retrofitting older systems for energy efficiency; heating & air conditioning repair; ventilation systems, and more. 

Products of the Week

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Unico System

A central heating and cooling system using "aspiration" technology to warm and cool homes evenly and quietly with flexible small ducts that weave through ceilings, walls, and even floors.

Sponsored

Floor Outlet

SpacePak

The total solution for central cooling and heating in ANY home or small business; regardless of structure design, age, size or type of construction.

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Unico System

A central heating and cooling system using "aspiration" technology to warm and cool homes evenly and quietly with flexible small ducts that weave through ceilings, walls, and even floors.

Featured

rheem-condensing-tankless-in-laundry-room

Rheem

The only manufacturer of integrated heating, cooling and water heating solutions, including tankless, continuous hot water, an advanced hybrid water heater system, and residential pool and spa products.

Floor Outlet

SpacePak

The total solution for central cooling and heating in ANY home or small business; regardless of structure design, age, size or type of construction.

1_gallery_custom1

Unico System

A central heating and cooling system using "aspiration" technology to warm and cool homes evenly and quietly with flexible small ducts that weave through ceilings, walls, and even floors.