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We Do it All - Give Us a Call! 618-694-7699

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Residential HVAC Contractor

We service, maintain, and install furnaces, boilers, heat pumps, mini-splits, and air conditioners, We have a complete sheet metal fabrication shop providing the right ventilation for your home. We offer zoning and IAQ products. We can upgrade your existing HVAC system or design one for your new construction product.
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Commerical HVAC & Refrigeration

From Rooftop units to boiler/chiller applications, we provide maintenance, repair service and installation. We are your Go-To commercial refrigeration contractor for all walk-in and reach-in coolers and freezers. We handler unit heater, radiant tube heaters and make-up air units.  Give us call. You'll be glad you did!
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 Providing Commercial And Residential Energy Audits


General contractors and building owners requiring blower door testing, envelope analysis, or energy audits; give us a call. Do you feel drafts or notice musty odors in your home? Give us a call. We can detect  unconditioned air infiltrating your home. Our technicians are trained and certified for blown-in and closed-cell  insulation and crawlspace encapsulation services. Our services are approved by the DOE. You may qualify for federal tax credits under the IRA 25(c).  Call to find out.
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Our 100% Customer Satisfaction Guarantee

We are a locally owned and operated heating, cooling, and indoor air quality company right here in Marion that cares about our customers and the communities we serve. We also provide energy audits, blown-in and closed-cell insulation services, plus crawlspace encapsulation services. Please call us to see if you qualify for the federal tax credits under the IRA 25(c) programs. We're dedicated to providing the best value in all our products and services, all backed by our 100% satisfaction guarantee. If you're not 100% happy, simply let us know and we will do everything we can to make it right. We appreciate your business and look forward to serving you.
 
Peace of mind feels good!
 
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Read What People Are Saying
Customer Testimonials
 

Review brian k
This could not have gone any better! These folks are the greatest!
— Brian K
R p lively review
When our 50-year old furnace went outduring freezing weather, John was the one Ameren sent to help us. He called that evening to let us know we were approved for a new furnace. He kept us informed about the process. "Thank you!" to John, Tim, and Boston for their exceptional job and attention to every detail. We highly recommend John and his team for their professional 5-STAR service and kindness shown to us. We can't say enough!
— Richard & Pat L

Contact Us Today to Schedule an Appointment

John's Mechanical Services is a complete indoor comfort contractor. Whether residiential or commercial; heating or cooling or insulation needs, we do it all. We have certified building analysis technicians and our on-staff professional who provide energy audits that qualify for the federal tax credits.  Our licensed and certified technicians can tackle even the toughest challenges. Contact us today for a free estimate or to request service.

Hours of Operation : Monday- Friday
7am- 4:30pm
Emergency Services 24/7
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Get in Touch or Request a Quote

Give us a call or send us a message using the form below.
 

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Service Area
We are Proud to Serve Marion, Illinois and the Surrounding Communities Including:
 

Ava
Belknap
Belle Prairie City
Belle Rive
Benton
Blairsville
Bluford
Bonnie
Broughton
Buckner
Buncombe
Bush
Cambria
Campbell Hill
Carbondale
Carrier Mills
Carterville
Centralia
Christopher
Colp
Crab Orchard
Crainville
Creal Springs
Cypress
Dahlgren
De Soto
Dix
Dowell
Eddyville
Eldorado
Elkville
Energy
Enfield
Equality
Ewing
Freeman Spur
Galatia
Goreville
Gorham
Grand Tower
Hanaford
Harrisburg
Herrin
Hurst
Ina
Jacob
Johnston City
Macedonia
Makanda
Marion
McLeansboro
Mount Vernon
Muddy
Mulkeytown
Murphysboro
Nason
New Burnside
Norris City
North City
Opdyke
Oraville
Orient
Pittsburg
Pomona
Raleigh
Royalton
Sesser
Simpson
Spillertown
Springerton
Stonefort
Thompsonville
Valier
Vergennes
Vienna
Wayne City
West City
West Frankfort
Whiteash
Zeigler