Central AC & Furnace Systems

Learn how to buy your HVAC system online!

Simply take your shopping list of your system needs and use those specifications to filter down to the right HVAC system for your home. Start by going to the top navigation, selecting the type of equipment you are looking for.

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Buying your heating and cooling system online saves you money – and you don’t have to be an HVAC expert to do it! We’ll walk you through how to determine what to shop for to replace your home HVAC system.

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What size air conditioner do you need? This video takes you through our Air Conditioner & Furnace Size Calculator. We’ll walk you through how to size your HVAC system using our sizing calculator.

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Blower motors are a crucial part of every furnace. Before you purchase your next furnace it is important to understand the different types of blower motors and how they affect you.

The field of HVAC manufacturers is getting crowded. A newcomer battles established brands for a share of the market, and the consumer stands to gain from the competition, if he chooses wisely. The best HVAC brands are often the names you have heard for years, owned by the best HVAC companies in the industry, but do not overlook the new kids on the block. 

AirQuest HVAC systems have long been recognized for delivering reliable performance, smart technology features like SmartSense™ and Wi-Fi compatibility, and competitive pricing. As of 2025, the AirQuest product line has been replaced by ACiQ, continuing the legacy of quality and innovation in residential heating and cooling solutions.

Heat pumps have changed the way we think about climate control in our homes and businesses. It used to be simple: air conditioners cool, furnaces heat, and that was it. But then along came the heat pump concept, and the terminology changed … slowly. Even now, there remains some confusion between the terms heat pump vs AC.

What is a heat pump?

You might have heard the term "air conditioner with a heat pump." While that's not too far off the mark, it isn't exactly correct. A heat pump is an air conditioner - an air conditioner that cools in the summer and heats in the winter. All heat pumps are air conditioners but not all air conditioners are heat pumps. Heat pumps are air conditioners configured with the ability to reverse the air conditioning process and provide heat instead of cooling. Appearance-wise there is practically no discernible difference between a standard air conditioner and a heat pump. You might be able to spot the reversing valve - a horizontal brass pipe near the coil fins that allows a heat pump to function - but that's essentially the only visible difference.

Modern air conditioning systems feel better, function better and fit better than their predecessors. The choices available to homeowners is greater than ever. Two of the most popular options with ductwork and ductless air conditioning, sometimes referred to as a mini split system. Both systems answer a lot of specific air conditioning needs and both have advantages for the homeowner. So between ductless vs central air, which system is better for your home or business? Read this article to find out.

If replacing your home or business air conditioning system ranks high on your to-do list, you should know the basics of the AC process beforehand. If you don't know what to look or ask for, you could spend thousands of dollars unnecessarily on equipment, installation and energy. You needn't rate as an expert in the subject, but a familiarity with the basics of an HVAC system can go a long way in matching your home to the type of air conditioning that suits it best. To help, we've provided an Air Conditioning for Beginner's guide. Here's what you need to know:

Furnace flue pipes may not be something you’ve thought about before, but they’re an important part of your gas furnace system. It’s good to have an understanding of what they are and why they’re important … and how they match to your furnace efficiency. A furnace flue pipe (also known as a vent pipe or simply as a flue), vents the exhaust from your furnace to the outside of your home. Furnace exhaust is dangerous and so having the right furnace exhaust pipe is important.

Now that winter is coming let us help explain the difference between AFUE & Furnace Staging. What is a multi-speed motor? What is a variable speed motor? Does this all sound complicated? It really doesn't have to be. Let us break it down so it is easy to understand.

Deciding which type of furnace you need to warm up your home is an important decision. Not only do you need a furnace that is the right size and within your budget, but also something that uses a fuel source that you prefer. In many modern homes, central heating units that run on natural gas are the most popular.

While homeowners frequently overlook them, furnace filters are essential components of any furnace system. The major functions of filters are improving air quality and helping your unit function optimally.

Climate control is necessary for a comfortable environment in any home, and we largely achieve this climate control through HVAC systems that cater to our heating and air conditioning needs. When it comes to heating and cooling of a building, there are a number of options available, but today we want to focus on furnaces and heat pumps, how they operate, and which operating conditions they are each best suited for.

With the cold season necessitating an effective way to keep your house warm, you need to decide which heating system is right for you. Heating options range from gas furnaces, electric furnaces, wood furnaces, and coal furnaces. The wide variety of options available can confound some homeowners, and in truth, no one heating solution fits all situations.

Here at HVACDirect, we are your source for the best in gas line furnace systems. With years of comprehensive experience in the heating and cooling industry, we continue to meet the furnace needs of countless home and business owners across the nation. A Goodman furnace includes highly dependable units, which ensure optimal heat for your property year-round.

Single stage furnaces have just stage of heat output: high. A single stage furnace will output 100% at all times, regardless of the temperature outside or inside the home. Imaging always driving your car at highway speeds, regardless of the recommended speed limit or road conditions. That's how a single stage furnace operates: the gas valve is either on or off.