Install or replace a new central air system in your home and receive up to $1750 in rebates. SIGMA Mechanical Services is a full service heating, ventilation, air conditioning, refrigeration, and plumbing company serving Marshfield and the surrounding area. We’re fully insured and licensed. You can trust the work we do, our technicians are fully trained on state of the art technology for all existing systems. All of us at SIGMA Mechanical Services are deeply committed to your satisfaction.

Air Conditioning Installation

Typically around $2,000 a year is spent on cooling a home, and if your system is more than 12 years old you can be sure it’s time to upgrade.

Upgrading to a Central Air System is not only great way to control the comfort in your home. With your specific needs in mind, our technicians figure out what type of Central Air System you will need.

Air Conditioning Repairs

We repair and service all major brands.

We offer 24-hour a day 7 days a week emergency service. We have a fleet of trucks, give us a call—we keep your temperature under control!

Preventative Maintenance

Performing Preventative Maintenance is the best way to keep your system tip top.

Once dirt and debris build up in the system you see premature system failure and soaring energy bills. Unclean systems draw an additional 30% of energy. If the filter is dirty the HVAC system has to run longer to heat or cool a space.

Single Room Systems

The Mitsubishi Ductless Split takes heating and cooling to a whole new level.

Ductless wall mounted units are almost inaudible, they’re highly efficient, and you’ll be amazed at how quick they cool a room. The mounts are perfect for additions, or if you want to cool one room like an attic, club house, man cave etc.


SIGMA Mechanical Services strives to keep costs down for the homeowner.

We are competitively priced, and we stand behind all the work we do. Give us a call to find out what we can do for you.