Professional AC Installation Services
Upgrade your home’s comfort with a reliable, energy-efficient air conditioning system. We provide expert AC installation designed to deliver powerful cooling, lower operating costs, and long-term performance you can depend on.
Whether you’re replacing an outdated unit or installing AC for the first time, our licensed HVAC technicians guide you every step of the way, ensuring the right system for your home, lifestyle, and budget.
Limited Time Offer
Save on your next AC install service. Check out our current promotions!
Why Install a New AC System?
Greater Energy Efficiency
Newer systems use advanced technology to deliver powerful cooling at a lower energy cost.Newer systems use advanced technology to deliver powerful cooling at a lower energy cost.
Better Indoor Comfort
Experience improved airflow, more consistent temperatures, and quieter operation.
Lower Energy Bills
High-efficiency AC units reduce monthly cooling costs, especially during peak summer heat.
Eco-Friendly Operation
Modern AC systems use environmentally conscious refrigerants and smart energy management.
Long-Term Reliability
With proper installation, your system can deliver dependable cooling for years.
Why Choose Marathon for AC Installation?
Choosing the right team ensures your new AC performs at its best from day one.
Licensed & Insured
Fully certified technicians with experience on all major AC brands.
Comprehensive Tune-Ups
Thorough inspection, cleaning, and testing for peak performance.
Flexible Scheduling
Convenient appointment windows to fit your routine.
Upfront Pricing
Thorough inspection, cleaning, and testing for peak performance.
Trusted Locally
Serving Los Angeles, Riverside & Orange County
Our AC Installation Process
At Marathon, we believe the best results come from a clear process and attention to detail. Here’s how we make your installation smooth and stress-free:
01
Personalized Recommendations
We assess your home’s size, insulation, and layout to choose the perfect system.
02
Professional Installation
Our licensed HVAC team handles all electrical and refrigerant connections safely.
03
Quality Assurance Testing
Every system is tested for performance, airflow, and temperature accuracy.
04
Clean Workmanship
We protect your home during installation and leave no mess behind.
05
Final Walkthrough & System Demo
We’ll show you how to operate your new AC efficiently and maintain it for peak performance.
Signs It’s Time to Install or Upgrade Your AC System
Not sure whether to replace your current unit? These common indicators signal it may be time:
Your System Is 10–15+ Years Old
Older units lose efficiency and are more prone to failure.
Frequent, Expensive Repairs
When repair costs keep stacking up, replacement is often the smarter investment.
Rising Energy Bills
A failing or outdated AC works harder and costs more to run.
Poor Cooling Performance
Weak airflow, hot spots, or constant cycling may mean your system is struggling.
You Want Better Efficiency & Comfort
A new AC system offers quieter operation, better airflow, and improved temperature control.
Serving Los Angeles, Riverside, and Orange Counties
At Marathon Plumbing, Heating, and Air, we’re proud to provide reliable furnace maintenance plans for homeowners and businesses throughout Los Angeles, Riverside, and Orange County. Our reputation is built on transparent pricing, expert service, and a commitment to keeping our customers comfortable year after year.
Los Angeles County
Riverside County
Orange County
San Bernardino
Pasadena
Long Beach
Related Cooling Services
Explore our full range of cooling solutions designed to keep your home running efficiently:
Fast, reliable fixes for all AC makes and models
Keep your system running consistently and efficiently
Upgrade to a modern, energy-saving system
Annual maintenance to boost efficiency and prevent breakdowns.
Smart thermostat installations & repairs
Installation, repair, and maintenance for high-efficiency zoned cooling systems.
Schedule Your AC Installation Today
Enjoy dependable cooling, lower energy costs, and a system built to last. Get started today with professional AC installation from Marathon Plumbing, Heating, and Air.