HVAC & Retrofit Systems

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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. 

SEE ALSO: Ceiling, Room & Whole-House Fans | Fireplaces, Inserts & Stoves | Hot Water | Radiators, Grilles, & Registers

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Roofing, Roof Ornament & Gutters

Preservation Products

Preservation Products is the exclusive licensed distributor for Acrymax preservation and restoration systems, also offering special formulated primers, sealers, clear coats, accessories and reinforcing fabrics.

Preservation Products

Preservation & Restoration Systems

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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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Mitsubishi Electric

Whether you have a single uncomfortable room, you’re renovating your entire house, or you’re building a home from scratch, Mitsubishi Electric has a Zoned Comfort Solution® that fits your unique needs.

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.

Bosch Heating And Cooling

DK Heating Systems, Inc.

Fires of Tradition

Hi-Velocity Systems

Energy Efficient Central Heating, Cooling and Indoor Air Quality Systems for over 35 years. The Hi-Velocity Small Duct System fits where others cannot, removing 30% more moisture from the air than conventional systems, and eliminating hot and cold spots in the home or office.

Hutchinson Plumbing, Heating, and Cooling

Oneida Air Systems

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.

Sila Heating & Air Conditioning

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.