Air Conditioner Installation, Repair and Replacement


Home Heating Systems

Installation, maintenance, and repair services improve the energy efficiency of your home and reduce heating costs. learn more

Air Conditioning

Central AC Systems

Efficient and affordable central air conditioning systems improve indoor air quality and help you beat the heat. learn more


All Your Plumbing Needs

From emergency plumbing services to complete plumbing system renovation and remodeling, we do it all. learn more


We Are Where You Are

Massachusetts and southern New Hampshire residents rely on Main Stream Mechanical. learn more

Air Cooling System for Older Homes

Efficiency and Flexibility with Unico Cooling Systems

The Unico system fits where other conventional cooling and heating systems can’t and with little or no remodeling required.  Modular air handlers and coils can easily be installed in attics, ceilings, crawlspaces and closets. The flexible small ducts can be routed through existing ceilings, floors or wall cavities.

Homeowners all across Massachusetts and New Hampshire are enjoying the high performance and superior comfort the Unico system provides. No matter when your home was built, installing a Unico system is always a possibility – without compromising the design or architectural integrity of your home.

Call us today for a no obligation consultation and find out if the Unico system is right for you.

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