JG Mechanical Service LLC is a locally owned HVAC contractor established in 2023, serving the Southwest Suburbs and greater Chicagoland area.

We serve homeowners and light commercial clients with a focus on system performance, efficiency, and long-term reliability. Every installation and service is completed with care, ensuring clean workmanship and dependable results. Our approach is simple: transparent recommendations, fair value, and comfort built to last.

Backyard garden area of a house with a small tree, several green and variegated plants, and an air conditioning unit. The house has beige siding and multiple windows, with some trees and blue sky visible in the reflection.

Professional Heating & Cooling Services

System Design & Installation

Every system we install is designed for the unique needs of your space.

HVAC system with ductwork, pipes, and equipment in a basement or utility room.

Preventive Maintenance Plans

Scheduled inspections, filter replacements, and performance tuning to extend equipment life and minimize unexpected downtime.

Inside view of an HVAC furnace showing various components, wires, and pipes, with a handwritten note on a metal panel indicating airflow direction.

Indoor Air Quality Upgrades

Advanced filtration, UV purification, and humidity control options to create a healthier environment for occupants.

An Aprilaire energy recovery ventilator system installed on a wall, with metallic ductwork connected to it for ventilation and airflow. The system has a label indicating it is a healthy air system.

Repair Services

No heat or AC? We’ll get you back up and running. We handle emergency repairs with honest diagnostics and straightforward solutions, no guesswork, no upsells. We work nights and weekends, so you don’t have to schedule around work or life.

A man lies on his back under a large electrical or mechanical panel, working on it with tools in hand in a basement or utility room with pipes and shelves with supplies.

How can we work with you?

Tell us what you need and we’ll follow up quickly to schedule service, answer a question or provide a quote.