Stay warm all winter with a brand-new, energy-efficient furnace. The Marathon Pros. are #1 Furnace Installation in town. Our licensed and certified installers make sure your unit is properly sized, safely installed, and running at peak performance. Count on us to keep your home comfortable and your energy bills under control.
35+ Years
Experience
Licensed
& Insured
Fully
Equipped
4.9/5 Rating
1,200+ Reviews
Serving All of LA
& Surrounding Areas
Complete Furnace Installation
Professional Installation Service
Expert system sizing and recommendations
Old furnace removal and disposal (if applicable)
Professional installation and setup
Thermostat integration and calibration
System testing and performance check
No Hidden Fees. Transparent pricing.
Don’t wait until the temperatures drop to find out your furnace isn’t ready. Professional installation saves money, prevents costly repairs, and delivers dependable comfort for years to come.
Save on Energy Bills
Modern high-efficiency systems consume less power, cutting monthly utility costs.
Save up to 30% on energy.
Prevent Costly Mistakes
Proper sizing and installation ensure your system performs at its best from day one.
Avoid expensive repairs later.
Extend Equipment Life
Correct installation can add years to your AC system’s lifespan.
Protect your investment.
consistent comfort
Even cooling throughout your home with professional ductwork and setup.
Perfect comfort, room to room.
Better air quality
Installations include filtration and ventilation checks for healthier indoor air.
Breathe cleaner, healthier air.
peak performance
Optimized systems run quieter and deliver stronger, faster cooling.
30% faster comfort.
Don’t risk your comfort and safety to a poor install. Marathon’s certified team ensures safe, efficient heating from day one.
$3000+
wasted on repairs when systems
are installed incorrectly
40%
higher costs
without proper installation and sizing
2-3 Days
Wait for emergency repairs
During peak summer seasons
Smart homeowners invest in proper installation the first time.
Our certified technicians follow a step-by-step process to ensure your system is installed correctly and runs at peak performance all winter long.
Initial Consultation
Assess your home’s cooling needs and recommend the right system.
System Selection
Provide clear options with features, efficiency ratings, and pricing.
Site Preparation
Ready the area and confirm electrical requirements.
Professional Installation
Install and connect indoor/outdoor units, wiring, and drainage with precision.
Ductwork Check
Inspect and adjust ducts for proper airflow.
Quality Testing
Run complete system checks for safety and performance.
Air Quality Setup
Install or replace filters for healthier indoor air.
Customer Walkthrough
Show you how to use your system and share maintenance tips.
Follow-Up Support
Check back to ensure your system continues running smoothly.
Over 35+ years of trusted service with thousands of satisfied customers across LA. Here’s what they’re saying about our #1 Furnace Installation service:
Our commitment to excellence shows in every review and every satisfied customer
4.9
4.9/5
Average Rating
From verified reviews
1.4K+
1,400+
Happy Customers
Across Los Angeles
35+
35+
Years in Business
Serving LA for decades
Smart homeowners schedule installation BEFORE problems occur
Join over 1,200 satisfied customers who prioritize their comfort
Keeping your home warm doesn’t have to break the bank. Take advantage of our latest promotions and coupons to enjoy professional furnace installation at a lower cost—without sacrificing quality or comfort.
EXPIRES October 31st, 2025
EXPIRES October 31st, 2025
EXPIRES October 31st, 2025
EXPIRES October 31st, 2025
EXPIRES October 31st, 2025
Avoid unsafe conditions and high repair bills. Our certified installers are ready to provide you with a reliable, efficient heating system.
35+ Years
Experience
Licensed
& Insured
Fully Equipped
Large or small jobs
100% Satisfaction
Guaranteed quality
Call now or schedule online to choose your preferred appointment time. Our customer service team is standing by to help you beat the chill.
Book Now
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