Credit Cards Financing Available!

We are in the comfort business and provide peace of mind

We offer financing, and we accept credit cards, checks, and cash

Quality Doesn't Cost, It Pays!

Furnace & Heating


Gas Furnaces, Electric Furnaces, Heat Pumps, Geo-Thermal, Garage Heaters, Infra-Red Heaters, Radiant Heat, Wall Furnaces, Pool Heaters, Hot Water & Steam Boilers, Mobile Home Furnaces, and much more here!

Air Conditioning


Central Air Conditioners, Air Handlers, Heat Pumps, Geo-Thermal, Ductless Air Conditioning Mini-Split Systems, Spacepak Units, Dehumidification Units, Pool Room Units, Packaged Units, Mobile Home A/C

Indoor Air-Quality


Air Cleaners, Energy Saving Thermostats, Humidifiers, Germicidal Lights, Zoning Systems, Dehumidification Systems, Air Purifiers, Energy Saving Controls, Carbon Filters, Exhaust Fans, Duct Cleaning & more!

Real People. Real Stories

"We Have used All Star twice now, Greg is a rock star, fast and friendly. Furnace decided to take the day off and it was 50 degrees in the house when I woke up, Greg was here and had me up and running within the hour. It's nice to know there's someone to call no matter when it is 24 hours a day."
Ken-DeKalb, IL

Our Service Area

Air Conditioning

Service now in the cities of DeKalb, Sycamore, Cortland, Waterman, Genoa, Kingston, Kirkland, Maple Park, Creston, Malta, Hinckley, Rochelle, Belvidere, Lee, Sandwich, Somonauk, Sugar Grove, Clare, Shabbona, and Esmond