Gas Furnace

Experience powerful and cost-effective heating with a gas furnace from Ranger HVAC, ensuring your home stays warm and cozy even in the coldest temperatures.

Your Guide to Choosing and Maintaining a Gas Furnace

Are you in the market for a new furnace? With so many options available, it can be overwhelming to choose the right one for your home. One popular choice is a gas furnace, known for its efficiency and cost-effectiveness. This guide will cover everything you need to know about gas furnaces, including their benefits, how they work, and what to consider when purchasing one.

What is a Gas Furnace?

A gas furnace is a heating system that uses natural gas as its fuel source. It is favored by many homeowners due to its efficiency and cost-effectiveness. Gas furnaces operate by burning natural gas in a combustion chamber, heating the air that is then circulated throughout your home via a duct system.

Benefits of a Gas Furnace

There are several benefits to choosing a gas furnace for your home:

  • Cost-effective: Natural gas is typically less expensive than other fuel sources, making gas furnaces a budget-friendly option.
  • Energy-efficient: Gas furnaces have a high energy efficiency rating, meaning they use less energy to produce the same amount of heat as other systems.
  • Reliable: Gas furnaces are known for their reliability and can last up to 20 years with proper furnace maintenance.
  • Quick heating: Gas furnaces can heat your home quickly, which is ideal for colder climates.
  • Cleaner burning: Natural gas is a cleaner-burning fuel compared to oil or wood, making gas furnaces more environmentally friendly.

How Does a Gas Furnace Work?

Understanding how a gas furnace works can help you maintain it better:

  1. Thermostat Detection: The thermostat senses that the temperature has dropped below the set level.
  2. Ignition: The furnace’s gas valve opens, allowing natural gas to flow into the combustion chamber, where it is ignited by the pilot light or electronic ignition.
  3. Heat Exchange: The heat exchanger warms up as the gas burns.
  4. Air Circulation: The blower fan turns on, blowing air over the heat exchanger. The heated air is then circulated throughout your home via the duct system.
  5. Thermostat Regulation: Once the desired temperature is reached, the thermostat signals the furnace to turn off.

Components of a Gas Furnace

A gas furnace consists of several key components:

  • Thermostat: The control panel for your furnace, allowing you to adjust the temperature.
  • Gas Valve: Controls the flow of natural gas into the furnace.
  • Combustion Chamber: Where the natural gas is burned to produce heat.
  • Heat Exchanger: A metal component that heats up as the gas burns and transfers that heat to the air.
  • Blower Fan: Circulates the heated air throughout your home.
  • Duct System: A network of tubes that distribute the heated air.

What to Consider When Purchasing a Gas Furnace

When buying a gas furnace, consider the following factors:

  • Size: A furnace that is too small will struggle to heat your home, while one that is too large will cycle on and off frequently, increasing energy costs. Have a professional assess your home to recommend the appropriate size.
  • Efficiency: Look for a furnace with a high Annual Fuel Utilization Efficiency (AFUE) rating. Aim for a rating of at least 90% to ensure energy efficiency.
  • Brand and Warranty: Choose a reputable brand with a good warranty to ensure support if any issues arise.
  • Cost: Consider your budget and choose a furnace that fits within it while meeting your needs.

Gas Furnace Maintenance

Regular furnace maintenance is crucial to ensure your gas furnace operates efficiently and reliably:

  • Change the Air Filter: Replace the air filter every 1-3 months to maintain proper airflow and prevent dust buildup.
  • Clean the Blower Fan: Clean the blower fan annually to remove accumulated dust or debris.
  • Inspect the Heat Exchanger: Check the heat exchanger annually for cracks or damage that could lead to carbon monoxide leaks.
  • Check the Gas Valve: Ensure the gas valve functions properly by having it inspected annually.
  • Professional Tune-up: Schedule an annual professional tune-up to catch potential issues and ensure efficient operation.


A gas furnace is a popular and cost-effective option for heating your home. By understanding how they work, what to consider when purchasing one, and how to properly maintain it, you can ensure your gas furnace continues to keep your home warm and comfortable for years to come. Regular furnace maintenance, prompt furnace repair, and proper furnace installation are key to maximizing the lifespan and efficiency of your system. If you find your current system is outdated or frequently breaking down, consider a furnace replacement to enhance your home’s comfort and energy efficiency.

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Rudi Chi
Rudi Chi
Our experience with Ranger HVAC was great. Our ground level HVAC system crashed after 20 years in the middle of a heatwave, in 2022. We called and scheduled a appointment for an estimate on a new system, Mike came out and explained all our options and helped us to pick the best system for us and our home. He was very professional and thorough. The whole experience was great and we would recommend Ranger HVAC to our friends and family. The workers that came out and installed the system were extremely nice and cleaned up after they were finished and were very informative about the whole new world of smart HVAC systems. The office support kept us informed of all the visits and invoices were completed electronically. Update We were so satisfied with Ranger's customer service that, four months later, when our 2nd HVAC system in the attic crashed on the new year's eve, after 20 years, we called Mike to install a new one. We couldn't be more happy with the results. Jennifer and Rudy
Kennedy Agyeman
Kennedy Agyeman
My heating system stopped working and a good friend of mine advised to me reach out to Ranger HVAC. The company representative responded in a timely manner and the diagnostic indicated issue with my blower motor, which required replacement. Ranger HVAC team brought in a new motor and replaced it at precise scheduled time with no delay.
Yolene Henry
Yolene Henry
Ranger HVAC installed a new HVAC system at my house yesterday. The company did an excellent job communicating with me from the time I requested a free estimate to the morning they arrived on site. They were careful to cover all the traffic areas and wore shoe covers. A team of three, including Michael the leader, completed the install to my satisfaction. They were patient to answer all my questions. I selected Ranger HVAC based on their knowledge, fair price, and honesty. Michael, who gave me the estimate, spoke from experience, having been himself an HVAC technician. The company didn't try to sell me what I didn't need. I felt that the information I received could be trusted. And indeed they delivered as promised! I am very pleased with the install and I highly recommend this company. Thank you Ranger HVAC for a job well done!
Jill Perrott
Jill Perrott
I had my HVAC ducts cleaned by Ranger HVAC this past week and was so impressed by their work. I saw what a comprehensive process it is and I’m very pleased with the result. Staff always cover their feet when in your home and are very careful when removing and replacing the vent covers and moving their ladders and equipment around. Very fair price as well. Thanks to Sean, Kofi, and Paul for a thorough job well done. I have already recommended Ranger to a couple of friends and will be contacting Ranger for any future HVAC issues.
James Thomas
James Thomas
I placed a phone call inquiring about VA HVAC licensing and the woman that I spoke with helped me figure out what to do. Very professional and pleasant to talk with!!!!
Poya Sharifaie
Poya Sharifaie
They came out and fixed the issue within 2 hours. Last company had us waiting for a month and half. I would use Ranger HVAC anytime.
Tatiana Melgarejo
Tatiana Melgarejo
excellent service. very punctual .. friendly 😊
jou b
jou b
The techs Shawn and Colby were great!! Showed up on time and was able to quickly resolve the issue with my ac. Really happy to find this company
gyan manu
gyan manu
Ranger HVAV responded to our needs and executed the job in the most professional way! Exceeded our expectations.

    Definitely a very good experience. If you're interested, the service is exactly what he says it is; he clearly explains everything he does and you can tell he's being sincere. He isn't pressuring you or trying to upsell you. Just an honest, high-caliber effort. Highly advised.

    Jirair Kaprelian


      He did a fantastic job cleaning and inspecting my commercial AC unit. He made suggestions that I was completely unaware of regarding how to improve circulation and air flow as well as how to minimise my use of electricity during the summer. Excellent rates and service. Once more, many thanks!

      Ryan Sellz

      Google Review

        He is the top in his field! Without having to be at 69 degrees, the AC functions better than before. Additionally, because the heater is so hot, we don't need to turn it up all the way, which saves us money.

        Andrea Magaña


          The crew was excellent, and I'm glad I found them since they are nice, down-to-earth people who didn't try to upsell me on items I didn't need instead of telling me about innovations that would make life better for my allergic relatives. All Degree Comfort comes highly recommended.

          Moral Defen



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