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Name: Advanced Heating & Air of Ottawa, Inc
Telephone: (815) 343-7637

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Advanced Heating & Air of Ottawa, Inc

"Serving Marseilles, Seneca And Ottawa Areas Since 1999"

About Us

Advanced Heating & Air Of Illinois, Inc. is your trusted HVAC partner in Marseilles, IL, serving LaSalle County and Ottawa. We specialize in both commercial and residential heating and cooling services, providing expert installation, maintenance, and repairs. Our team excels in handling everything from boilers to water heaters and innovative tankless systems, ensuring your space remains comfortable and efficient. Rely on us for all your HVAC needs. Reach out today for outstanding service! Our business hours are Monday to Friday, 8 AM to 5 PM. For emergencies, feel free to call, leave a message, or text us.

Areas Served

Our Professional Associations

Chamber of Commerce

Our Certifications

Licensed
Insured

What We Offer

Our Specialties include:

Heating Service Calls
Air Conditioning Service Calls
New Commercial Insulation
New Residential Insulation
Commercial AC Equipment
Residential AC Equipment
Services All Makes and Models

Our Services include:

HVAC – Complete heating, ventilation, and air conditioning services to maintain year-round indoor comfort.
Furnace Repair – Diagnostic and repair services to restore furnace performance and home heating.
Furnace Installation – Professional installation of energy-efficient furnaces tailored to your space and needs.
Air Conditioner Repair – Fast and reliable AC repairs to resolve cooling issues and improve system efficiency.
Air Conditioner Installation – Expert installation of air conditioning systems for optimal comfort and energy savings.
Boiler Repair – Skilled repair of boiler systems to fix leaks, pressure problems, and heating failures.
Boiler Installation – Installation of modern, high-efficiency boilers for consistent and reliable heating.
Water Heater Repair – Repair services for traditional and tankless water heaters to restore hot water quickly.
Water Heater Installation – Installation of water heaters suited to your household’s size, usage, and energy goals.
Tankless Water Heater Repair – Specialized repair for on-demand water heaters to fix flow rate and heating issues.
Tankless Water Heater Installation – Space-saving, energy-efficient installation of tankless systems for instant hot water.
Park Models – HVAC and plumbing solutions customized for park model homes and RVs, including compact system design and installation.

Our Brands include:

Our Products include:

Furnaces
Air Conditioners

Testimonials

On 8/31/2025 Kathy had this to say:
Chris was amazing from the beginning to the end! If course our air conditioner went out during the heat wave. We knew it was gonna die sometime since it was 35 years old, but Chris still tried to find a way until it was inevitable that we needed a new one. He got it for us the next day AND put it in! We only went 1 day/night without air! Additionally, he is an expert at what he does! Thank you so very much Chris!!! Testimonial written by Kathy on this site.

On 5/30/2025 Juan Becerra had this to say:
If your looking for a knowledgeable HVAC technician in Marseilles/Ottowa area Chris is your guy! He goes the extra mile of explaining everything and what he recommends for your home. He rececently replaced the a/c unit and furnace and I couldn't be more satisfied! Prior to the big job, Chris would get our 25 year old a/c unit going to get us threw the season in a timely matter!

On 5/29/2025 Dina ochoa had this to say:
Chris is the best very trustworthy he came right away when I asked for an estimate within 10minutes!!! He came the following week to install furnace and ac we were very pleased! Highly recommend! Testimonial written by Dina ochoa on this site.

On 1/25/2025 Laurie Bierman had this to say:
Chris has serviced our boiler over the years and recently replaced our water heater. He does an excellent job! He explains things clearly, is always very thorough and leaves the area clean, and is reasonable in price.. Glad we found Advanced Heating and Air!

On 1/12/2025 Ben jamin had this to say:
Definitely recommended.

Contact Us

Advanced Heating & Air of Ottawa, Inc
Ottawa, IL 61350
Phone: (815) 343-7637
Email: aha@mtco.com

Where To Find Us

Payment Types Accepted

Personal Checks, Discover, American Express, Debit Cards, Cash, MasterCard, Visa, Venmo

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Tuesday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Wednesday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Thursday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Friday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Saturday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service
Sunday: Open 24 Hours Call or Text on Nights or Weekends for Emergency Service

News

Make your barndominium a true home with reliable heating and cooling solutions from Advanced Heating & Air of Ottawa! 🏡❄️ Whether you're installing a new air conditioner or repairing a boiler, our team ensures your space stays perfectly comfy. Don't sweat the heat or shiver in the cold—we’ll keep your barndo blissful year-round! 🚀

FAQ

How often should I have my HVAC system serviced?

We recommend servicing your HVAC system at least once a year for optimal performance, ideally before the peak heating and cooling seasons.

Do you offer emergency HVAC services?

Yes, we offer emergency services. Please call or text us for immediate assistance.

What are your business hours?

We are open Monday through Friday from 8:00 AM to 5:00 PM.

Should I cover my AC unit?

You can cover your AC unit, but we recommend removing the cover. Covering can trap moisture, leading to potential damage. Instead, remove debris regularly and ensure proper airflow.