508-747-2180 keith@kbguidetti.com

About Us

K. B. Guidetti Mechanical is a family owned and operated company based in Plymouth, MA. The founder of the company, Keith., has experience of over 30 years in the industry. Whether it’s diagnosing, repairing, installing, or servicing air conditioning or heating units, we have been gaining new happily satisfied customers every year!

Our Story

Providing HVAC Services Since 1991

The experienced and knowledgeable HVAC technicians at K. B. Guidetti Mechanical understand that each customer’s needs are unique. Therefore, they provide cooling and heating solutions that meet each specific situation. Our company also specializes in environmentally friendly HVAC products like hybrid systems and heat pumps.

Due to our highly satisfied customers and the dozens of referrals we receive each month, K. B. Guidetti Mechanical has become one of the most successful companies in the South Shore area .

Extended Plan:

Extended warranty protection plans improve your over-all comfort by protecting you from the costly expense of breakdowns in the years to come. Extended warranties include: parts, compressor, condenser coil, evaporator coil, heat exchanger and labor.


Dear Keith, Just a note to thank you for the job well done. We really appreciate the efficiency with which the job was done and especially the end result. You and your wife make a great team. We enjoyed meeting you both. While we won’t get a lot of use out of the cooling unit until next year, your rave reviews about the system have given us confidence that we will enjoy it for years to come. It is a genuine pleasure to do business with a contractor who cares about customers.

Babrara Michaluk and Bob Johnson

Keith, just a short note to tell you how much we have enjoyed the Mr. Slim air conditioners that you installed for us.  They have operated continually from July 4th until just the other day without a problem or issue. 


As you might remember we had you install 1 unit in April 2008 to replace an 

in- wall unit in our home which cooled the downstairs but was very noisy and far from energy efficient.


We were so delighted with how quiet it was and how it well it kept the downstairs of our home dry and comfortable while using less electricity than the older unit, we had you install the 2nd unit this April in the upstairs bedroom of our antique cape. 


The same story, it is quiet and allowed a good night’s sleep while using less electricity than the previous window unit. 


I have recommended Mr. Slim and your firm to friends and neighbors, so be prepared to install an additional unit in our area. 

Bob and Terri Lannin

Dear Keith, I wanted to write and tell you how happy we are with the Mitsubishi Mr. Slim you installed
for us earlier this month. It is much quieter than the window air conditioners we used to have and we really appreciate getting our windows back, 
having the daylight again and being able to open them when we want to. The installation went better and quicker than we had expected and it’s rare to have something turn out to cost less than what was quoted. What a great alternative to central air with no ducts in the attic or vents cut into each room. I’d be happy to recommend your company and products to anyone I know. 

Marion Charette

Dear Keith, just a quick note to thank you for your recent installation of our new Mr. Slim air conditioner. You are truly a professional. Your estimates were right on the mark. The installation was perfect. We love the units. They are quiet and efficient. I would recommend you, your company and your product to any prospective customer without reservation. 

Dave Taylor


76 S. Meadow Rd.
Plymouth, MA 02360