HVAC Contractors in Monrovia, CA

HVAC contractors install, repair and maintain the heating, ventilation and air conditioning equipment that keeps your home comfortable. They work on furnaces, air conditioners, ductwork, thermostats and ventilation, and help size replacement systems.

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Common HVAC services include:

  • Furnace and air conditioner repair
  • Seasonal tune-ups and maintenance plans
  • Replacing furnaces, AC units and air handlers
  • Ductwork repair, sealing and installation
  • Thermostat and ventilation upgrades

Call an HVAC contractor when your system stops heating or cooling, runs constantly, makes new noises, or your energy bills jump. Heat pump installation and air duct cleaning also have their own categories.

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Top Professionals near Monrovia, CA

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Heating Alternatives LLC
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Los Angeles, CA HVAC Contractors

Heating Alternatives specializes in HVAC installations, repairs, and services for residential properties and commercial locations. We provide the one-stop-shop convenience with our knowledgeable technicians; whose primary goal is not only to complete the job at hand but also ensure the positive experience for our customers. Established in 2014, Heating Alternatives started off as a one-man setup and has since then transformed into a tight-knit team of HVAC pros. We stand by our work and provide some of the best pricing in the city and avoid the whole sale-tactics approach. We treat every home and business like it’s our own. Our Mission Provide quality work and transparency within the HVAC industry. Heating Alternatives is dedicated to an upfront approach to projects voiding the sales-tactics and repairman box-in techniques commonly used by competitors. We treat every house and business as if it’s our own.

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Home Upgrade Specialist Inc (TESLA, HVAC, ROOF, SOLAR)
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Los Angeles, CA HVAC Contractors

Home Upgrade Specialist is a Los Angeles-based contractor specializing in sustainable, energy-efficient home improvement solutions that enhance comfort, reduce costs, and increase property value. With over 15 years of experience, the company provides a comprehensive range of services including HVAC installation and maintenance, roofing, Tesla Solar Roof and Powerwall integration, solar panel installation, ADU and garage conversions, full remodels, windows, insulation, and exterior painting. As a certified Tesla Solar Roof and Powerwall installer, an Owens Corning Preferred Contractor, and an authorized Daikin dealer, the company combines technical expertise with eco-friendly innovations to deliver durable and forward-thinking solutions. Home Upgrade Specialist emphasizes customer satisfaction through tailored designs, professional workmanship, and financing options, while helping homeowners take advantage of rebates and tax credits for energy upgrades. The company’s mission is to make sustainable living accessible and affordable, ensuring homes across Los Angeles and Orange County achieve peak energy efficiency and long-term comfort.

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JW Plumbing, Heating and Air
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Los Angeles, CA HVAC Contractors

JW Heating & Air is a Los Angeles-based service company that has been delivering trusted heating, cooling, plumbing, and drain solutions for over 18 years. The company is committed to providing homeowners with reliable and efficient comfort solutions, offering a wide range of services including A/C repair and installation, heating system maintenance, furnace and heat pump services, plumbing repairs, water heater installations, sewer and drain clearing, and advanced leak detection. With NATE-certified technicians, full licensing and insurance, a 100% satisfaction guarantee, and 24/7 live answering, the company strives to ensure customer comfort and peace of mind. JW Heating & Air emphasizes convenience with online scheduling, free in-home estimates, complementary second opinions, and financing options, proudly serving the Greater Los Angeles Area, San Fernando Valley, and San Gabriel Valley.

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LC Heating & Air Conditioning
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Los Angeles, CA HVAC Contractors

LC Heating & Air is a licensed HVAC company serving Hollywood, Los Angeles, Pasadena, and surrounding areas, specializing in emergency heating, ventilation, and air conditioning services. With more than 20 years of industry experience, the company is dedicated to providing reliable, cost-effective, and high-quality solutions for both residential and commercial clients. LC Heating & Air offers a comprehensive range of services including AC repair, installation, maintenance, furnace and heat pump services, commercial HVAC systems, indoor air quality improvements, duct cleaning, attic insulation, and energy-efficient HVAC upgrades. The company operates 24/7 for emergency HVAC repairs, ensuring that customers receive timely assistance whenever needed. Built on values of professionalism, transparency, and customer satisfaction, LC Heating & Air takes pride in delivering dependable service and long-lasting HVAC solutions across Hollywood, West Hollywood, North Hollywood, and the greater Los Angeles area

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Pure AIR
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Los Angeles, CA HVAC Contractors

Pure Air LA is a professional heating, ventilation, and air conditioning service company based in Los Angeles, California. The company specializes in AC and furnace repair, installation, maintenance, and air duct cleaning, aiming to provide reliable solutions for both residential and commercial clients. Pure Air LA emphasizes honesty, efficiency, and customer satisfaction, ensuring fair pricing and quality service delivered by licensed and certified technicians. With a focus on keeping homes safe, comfortable, and energy-efficient, the company offers emergency repair services, installation of new HVAC systems, and routine maintenance to extend equipment life. Committed to professionalism and respect, Pure Air LA prides itself on punctuality, clear communication, and leaving customer homes in pristine condition. The company also provides financing options to make HVAC projects more accessible and maintains a strong reputation through positive client feedback and long-term reliability.

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Service Genius Air Conditioning and Heating
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Los Angeles, CA HVAC Contractors

Service Genius is a Los Angeles-based home services company specializing in HVAC repair, installation, and maintenance, as well as indoor air quality solutions and water heater services. The company is dedicated to providing five-star rated service across the Los Angeles area, offering 24/7 emergency support and same-day appointments to ensure comfort and efficiency for its customers. With a highly trained and licensed team, Service Genius focuses on delivering reliable, transparent, and science-based solutions without high-pressure sales tactics. The company’s expertise extends across air conditioners, heaters, VRF systems, furnaces, heat pumps, and both traditional and energy-efficient water heaters. In addition, Service Genius emphasizes the importance of indoor air quality, providing testing and improvement services to create healthier living environments. Guided by a commitment to precision, comfort, and customer satisfaction, the company positions itself as the “Smart Choice” for home services throughout Los Angeles.

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Southwest Heating & Air Conditioning
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Los Angeles, CA HVAC Contractors

Southwest Heating and Air Conditioning, founded in 2014 by Eric and Stephane, is a family-owned business dedicated to providing top-quality heating and cooling services across Southern California. The company specializes in both residential and commercial projects, offering installation, replacement, repair, and maintenance of air conditioning, heating, and indoor air quality systems. Southwest Heating and Air Conditioning prides itself on its reliable, trustworthy, and customer-focused approach, earning over 400 five-star reviews on Yelp and recognition as one of the Top 10 Best Heating and Air Conditioning Companies in Southern California. With licensed, bonded, and insured specialists, the company provides affordable rates, financing options, 24/7 emergency service, and environmentally responsible solutions that help reduce energy costs and carbon footprint. Through a blend of professional expertise and family-oriented service, Southwest Heating and Air Conditioning delivers comfort and efficiency to homes and businesses alike.

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Heating and Air Conditioning Questions and Answers

What does an HVAC contractor do?

An HVAC contractor installs, repairs and maintains heating and cooling systems, including furnaces, air conditioners, air handlers, ductwork and thermostats. They diagnose problems, perform seasonal maintenance and size replacement equipment for the home.

When should I repair or replace my heating or cooling system?

Repairs often make sense for a newer system with a single failed part. Replacement is worth discussing when equipment is older, needs frequent repairs, uses a phased-out refrigerant, or no longer keeps the home comfortable. Ask the contractor to compare both options in writing.

How do I choose an HVAC contractor?

Look for a contractor who performs a load calculation before recommending new equipment, explains options clearly and provides written estimates and warranty terms. Ask whether technicians who handle refrigerant hold EPA Section 608 certification and whether local licensing or permits apply.

What affects the cost of HVAC work?

Repair costs depend on the part and diagnostic time. Replacement depends on equipment type, capacity and efficiency, ductwork changes, electrical or gas work, and local permit requirements. Maintenance plans, rebates and the season you schedule in can also affect the total.

How should I prepare for an HVAC service visit?

Clear access to the furnace or air handler, the outdoor unit and the thermostat, and replace or check the air filter if you can. Note what the system is doing, such as noises, short cycling or uneven temperatures, and when the problem started.