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Smither’s Mechanical Co.

SMC Heating & Cooling, LLC is a family owned and operated heating and cooling contractor. Owner Shawn McDonough has over 28 years experience in the industry servicing the metro area. Working with Smither’s Heating and Cooling from 1988 to March of 2008 before starting SMC Heating & Cooling LLC.

We service both commercial and residential customers. Specializing in high efficiency replacement, furnace and air conditioning system upgrades, including EPA mandated, environmentally safe, R-410A refrigerant systems.

Our company’s full range of products and services includes; a wide range of heating and cooling manufacturers products, replacement parts, duct work, humidifiers, air filters, purifiers, spring, summer and fall system tune-ups, maintenance agreements, and more.

We can also service any make or model and have the experience to give you accurate replacement parts/equipment at a competitive price.


  • Air Conditioning Repairs
  • New Air Conditioning Systems
  • Humidifiers Sales & Installation
  • Heating System Repairs
  • New Furnace System Sales & Service
  • Custom Duct Work & Installation
  • Residential HVAC Services
  • Commercial HVAC Services
  • Thermostats
  • Air Filtration & Purification Systems


  • Comfortmaker
  • Trane
  • Rheem
  • Luxaire
  • Lennox
  • Kenmore
  • Honeywell
  • Carrier
  • Bryant
  • Amana
  • York
  • Goodman
  • Heil
  • Sears
  • Whirlpool
  • White-Rogers

Emergency Services

You need emergency services on your Heating and Cooling System…then contact us for more information on how was can help.

Your System Doctor

We can review your heating or cooling systems  and provide you with the information you need to make the best decision for your home or business.

Find Us On the Internet

Thank you for visiting our website.  We encourage you to contact us to schedule an appointment to have your system inspected.

Helpful Agents

We look forward to hearing from you and encourage you to give us a call to help you with your heat and cooling system

Check List

We will review the check list of item related to you home or company’s heat and cooling systems and make a recommendation on the best course of action

24/7 Phone Support

SMC offers exceptional support services to help our customers with the heating and cooling needs

Your satisfaction is our top concern.

At Smither Mechanical Contracting  [SMC] are chief concern is your satisfaction. With over 25 years of industry experience we look forward to helping you with your home or business systems.

Years In Business
Flexible Plans
Happy Customers
In The Industry

Nine degress and no heat! I need replace part for heat system and called them late on a Friday and someone answered the phone 🙂 They had the parts and met up with me early the next to install.

Keith T
Rating: 5

Just wow. I knew I was going to get a great service, but the staff went above and beyond all my expectations. I will be recommending them to all my friends. Five stars!

Tommy B
Rating: 5

Finding a trusted contractors was the at the top of my list when building my addition, but Shawn made choosing the right products and contractor easy.  I’m so glad I found them.

Brenda C
Rating: 5
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