A family owned business that serves residential, commercial and industrial customers over the entire Washington D.C. Metro area, Northern Virginia, and most of Maryland.
- 24/7 Emergency Services
- Licensed & Insured
- 100% Satisfaction Garanteed
We specialize in commercial HVAC services, offering expert installation, maintenance, and repair solutions designed to keep your workplace comfortable, energy-efficient, and operating at peak performance.
We provide trusted residential HVAC services, delivering expert installation, repair, and maintenance solutions to keep your home comfortable, energy-efficient, and worry-free in every season.
Services
Air Conditioning
Installation, Repair & Service
Heat Conditioning
Installation, Repair & Service
Indoor Quality
Enhancement
Inspections
Residential & Commercial
Energy Efficient Upgrades
"Green" System
Service Agreements
Planned Preventive
What Our Customers Say
“Great service and timely. I set up the appointment and they came on time. Price was reasonable. They are a small family owned business and I am happy to support them.”
Mary
January 2026
“I’ve been getting service from Cosmos for years now, and they always have been very reliable and helpful. Got a water heater installed recently, the price was great and work was done professionally.”
Alexander
October 2025
“Great team. Jesse and David were efficient, knowledgeable, communicative, and kind. Will definitely be using Cosmos in the future and recommend to anyone.”
Kara
October 2025
Award Winning Service
We Wrote a Book
With over 50 years combined HVAC industry experience, Gus Christofi and his son George Christofi have seen virtually every type of repair problem imaginable. Check out our book on Amazon that will help save you hundreds in repair bills!
