How to Choose Heating and Air Conditioning System: All You Need to Know

How to Choose a Heating and Air Conditioning System?


Jake Smith, Online Marketing Strategist
Technically Reviewed by Jake Smith, Online Marketing Strategist on Mar 6, 2025 | Written by Alpha Mechanical Editorial Contributors

Is your aging HVAC system constantly breaking down? It may be time for a replacement. This guide will help you navigate the process of choosing the perfect new system for your home, whether you’re looking to boost energy efficiency or simply upgrade an outdated unit.

Buying a new HVAC system that is right for you can feel overwhelming given the various options available. Because your home’s climate control significantly impacts your home’s comfort, energy costs, and air quality, it’s important to go over all your options. Factors like home size, local climate, and personal preferences should all play a role in your decision.

Types of HVAC Systems

The first thing to make note of when choosing an HVAC system is the different types of units and their functions. The most common HVAC system is a standard split system which involves a central air conditioner system and a furnace, however, there are other units that might meet your property and financial means better. Here are 3 of the common types of HVAC systems:

Split System

A split HVAC system has indoor and outdoor units, with the outdoor unit containing the condenser and compressor, and the indoor unit containing the evaporator and air handler. Split systems use an outdoor condenser and an indoor heating unit (often a furnace) to regulate home temperature. The air conditioner cools the air using refrigerant and sends it through ductwork.

Various configurations exist, including AC units with furnaces, heat pumps with air handlers (for warmer climates), and heat pumps with furnaces (for colder climates). Split systems are versatile upgrades for homes with existing ductwork, but new installations can be expensive and time-consuming.

split HVAC system

Ductless Split System

A ductless split system heats or cools individual rooms without ductwork, using an outdoor unit connected to one or more indoor units. This system allows people to control the temperatures in each room without running their entire system. This option does require having large units installed on your walls or ceiling that are visible in the home.

ductless split system

Packaged System

A packaged HVAC system combines all heating and cooling components into a single outdoor unit, often installed on a roof or slab. This system best suits homes located in warmer climates. Packaged systems are easier to install if the home already has ductwork installed, however, they have shorter lifespans than split systems. These units cannot be customized and have an increased need for service calls that make them less desirable for many homeowners.

packaged HVAC system

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6 Key Factors to Consider When Choosing an HVAC System

There are a number of things to ask yourself and consider to help highlight what your priorities are when selecting an HVAC system that will work best for you and your home including budget, comfort and energy efficiency. An HVAC buying guide would be incomplete without considering these important factors:

1. What Type of System Do You Want?

There are many different types of HVAC systems each with advantages and disadvantages based on your home and needs. For example, if you want to prioritize comfort in your living space, you might choose a heat pump in a split HVAC system.

If you want to be able to customize the temperatures in different locations of your home, a ductless split system would allow you to control each room’s temperature individually. Decide which system you think would work for you based on your home’s layout and priorities and discuss that with a technician before finalizing your decision.

2. Where Do You Live?

An important factor that goes into deciding how to choose HVAC system includes the climate in the area that you live. For areas with harsh winters and moderate summers, a furnace combined with ductless cooling in frequently used rooms could be ideal. Conversely, in regions with extreme summers and mild winters, ductless heat pumps can efficiently cool key areas and provide minimal winter heating.

Your location also determines the minimum SEER rating standards your new HVAC system will need. All regions have slight differences in those standards, making it important that you know the minimum requirements for your area, regardless of the system you choose.

3. Consider your Budget and Long Term Maintenance Costs

Choosing an HVAC system is more than just the beginning purchase price. Replacing your HVAC system is a significant investment covering equipment, installation, operating costs and long-term maintenance. Prices vary considerably, with some units costing double others, so careful budgeting is essential.

Expect to spend between $5,000 and $12,500, with the average homeowner paying around $7,500. The availability and cost of replacement parts, and the system’s warranty coverage are good things to research.Remember to keep in mind: your home’s size, local weather, type of systems, energy efficiency, system features, long-term costs.

4. Consider Features and Technology of Systems

When selecting your systems keep in mind these features:

  • Programmable/Smart Thermostat: Smart thermostats offer remote control and monitoring of temperatures throughout your home via mobile apps for enhanced flexibility and energy savings. Programmable thermostats allow for customized temperature schedules based on daily routines, enhancing energy use and reducing costs.
  • Zoning Systems: Zoning systems are ideal for larger homes, allowing customized heating and cooling in distinct temperature zones throughout the house.
  • Variable Speed Motors: Variable speed motors adjust the speed of which your air meets the heating and cooling needs, resulting in more precise temperature control and improved energy efficiency.
  • Air Purifications and Filtration: Advanced air purifiers and high-quality filters in HVAC systems enhance indoor air quality by removing allergens, dust, and other pollutants.

5. What System Do You Currently Have?

When you contemplate what HVAC system should I buy, you should keep in mind the type of unit you already have installed. Replacing your existing HVAC system with a similar type is often the most cost-effective and least disruptive option.

For example, if you don’t already have ductwork installed for central air or heating system, then you’ll likely spend about twice as much installing ducts if you want a ducted system installed. This is important to discuss what kind of labor will go into installing a new system based on what you have or don’t have already within the home.

6. Is Noise Important to You?

Noise levels are another important factor. When a furnace kicks on near a common living space, it can be heard throughout the home. Ductless systems also generate some noise, both from the outdoor condenser unit and the indoor wall-mounted unit. This can be a concern for those whose priority is a quiet environment or with sensitive sleepers.

Choosing a good HVAC system for you depends on location, property features, and individual needs, consulting a local HVAC contractor in Sacramento is highly recommended.

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Finding the Right Contractor

We have covered how to choose an HVAC system but what about the contractor? Besides making the decision on HVAC equipment, you might be asking yourself what to look for when choosing an HVAC brand? Determining how to choose a heating and air conditioning contractor is crucial for home comfort and peace of mind. It is important to verify credentials/reputation, to prioritize certified technicians, and quality equipment, ensuring efficient and reliable HVAC system operation.

There are also common errors and oversights that can be avoided that you need to keep in mind to such as:

  • Ignoring home performance improvement opportunities when it comes to air sealing conditions and home insulation. Even if the contractor you’re working with did not perform the original work.
  • Incorrectly positioning units or improper airflow design, including clearing the area around the AC unit and strategically placing vents high on walls or ceilings. This is crucial to correct for optimal system performance and should be carefully considered during installation.
  • Forgetting to check on ventilation and ductwork before deciding which one to buy and install. While reusing existing ductwork may seem cost-effective, it can trap pollutants, reduce air quality, and hinder the performance of a new HVAC system if the ducts are incompatible or improperly sealed.
  • Undermining the process with incomplete or improper HVAC installation, such as neglecting refrigerant line insulation or incorrect wiring, can significantly hinder system performance. This leads to damage and various operational problems. Covering things like refrigerant levels/leaks, positioning the thermostat correctly, and understanding combustion safety can save you headaches later.

Final Thoughts

Selecting the right HVAC system is a significant investment that impacts several aspects of your life. By carefully considering the type of system you have, climate, budget, features, and noise levels, homeowners can pick HVAC systems that are the best options for their needs. Our tips for buying new HVAC system also include partnering with a qualified and reputable HVAC contractor.

HVAC technicians have a lot to keep in mind as they work with their clients to avoid common pitfalls like neglecting home performance, airflow design, or ductwork issues. Ultimately, a well-informed decision and a skilled installation will ensure a comfortable and efficient home environment for years to come.

Frequently Asked Questions

Which type of HVAC system is right for me?

Choosing the right HVAC system depends on factors like climate, budget, personal preferences, and existing infrastructure.

How long should my HVAC system last?

While HVAC systems typically last 10-20 years, with an average of 20, individual components like furnaces (15-30 years) and heat pumps (10-15 years) have varying lifespans.

What is the best time of year to purchase an HVAC system?

It is best to purchase HVAC components in the fall or spring as this can yield savings of 10-15% due to lower demand compared to the peak summer and winter seasons.

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