Gist Service Company - Killen's Certified HVAC Services

We provide complete HVAC installation and replacement services for residential and light commercial properties in Killen and the Shoals area. This includes new system installations for both existing homes and new construction, as well as replacing outdated or inefficient units. We handle all varieties of equipment, from traditional central systems to ductless mini-splits and roof-mounted units, and work with all major brands. Our over 38 years of local experience ensures proper sizing and installation for optimal performance.

We offer comprehensive HVAC repair services with 24-hour emergency availability for residents in Killen. Our licensed technicians diagnose and fix issues with heating and cooling systems, including repairs for gas piping, duct work, and all major equipment brands. With over 38 years of experience, we provide reliable repairs to restore comfort quickly, and we're licensed, bonded, and insured for your peace of mind.

For clogged air filters, which are a frequent issue in our area due to local dust and pollen, we recommend regular filter changes every 1-3 months to maintain airflow and system efficiency. We can assist with filter replacement or upgrade recommendations during maintenance visits. For smart thermostat connectivity problems, our technicians provide troubleshooting and installation services to ensure proper setup with your HVAC system, helping you manage your home's temperature effectively year-round.