Looking to buy or sell HVAC equipment in the resale market? Our comprehensive buying guide is here to help. The HVAC market is booming, expected to exceed $32 billion in 2024 with a 7.4% CAGR from 2024 – 2030 (SEMrush 2023 Study). We’ll compare premium, certified pre – owned systems with counterfeit or uncertified models. Discover the 3 key steps in quality checks for refurbished units as per ANSI/ASHRAE 40 – 2025. With a Best Price Guarantee and Free Installation Included, don’t miss out on these great deals in your local area!

Refurbished unit quality checks

The HVAC market size is expected to be more than $32 billion in 2024 and grow by a compound annual growth rate of 7.4% between 2024 and 2030 (SEMrush 2023 Study). With such a large and growing market, ensuring the quality of refurbished HVAC units is crucial. This section will outline the key steps in the quality – checking process for refurbished HVAC units.

Initial inspection steps

Visual and structural checks

When starting the inspection of a refurbished HVAC unit, the first step is a visual and structural check. A technician will look for any obvious signs of damage, such as dents, cracks, or rust on the unit’s exterior. For example, a rusty condenser can indicate water damage and may lead to future corrosion issues. Pro Tip: During a visual inspection, make sure to check for any misaligned or bent parts, as these can affect the unit’s performance and lifespan.

Component – by – component checks

After the visual inspection, a component – by – component check is essential. This involves assessing each part of the HVAC system, including the blower motor, control boards, and refrigerant components. Most HVAC systems rely on imported components, even those assembled in the U.S., so it’s important to ensure these parts are in good condition. For instance, a faulty blower motor can reduce airflow and put extra strain on the system. As recommended by industry experts, this thorough check helps to identify any potential issues that might not be visible during a basic visual inspection.

Performance testing methods after initial inspection

HVAC performance test

Once the initial inspection is complete, a comprehensive HVAC performance test is conducted. This test assesses the unit’s capacity and energy efficiency. ANSI/ASHRAE 40 – 2025 establishes a standardized procedure to assess the capacity and energy efficiency of such units. This standard determines the proper rating for the equipment based on its performance under controlled testing conditions. For example, a refurbished central air conditioner will undergo tests at different load levels and temperatures to ensure it meets the required standards.
Key Takeaways:

Visual and structural checks are the first step in inspecting a refurbished HVAC unit, looking for damage and misaligned parts.
Component – by – component checks are crucial to ensure each part of the system is in good working condition.
Performance testing using standards like ANSI/ASHRAE 40 – 2025 is necessary to evaluate the unit’s capacity and energy efficiency.
Pro Tip: Request a detailed report of the performance test results when purchasing a refurbished HVAC unit. This report can serve as evidence of the unit’s quality and help you make an informed decision. Try our HVAC performance calculator to estimate how a unit might perform in your specific environment.

Certified pre – owned systems

Did you know that the HVAC market size is expected to be more than $32 billion in 2024 and grow by a compound annual growth rate of 7.4% between 2024 and 2030? As the HVAC industry continues to thrive, certified pre – owned systems have become an attractive option for many buyers. These systems offer a balance between cost – effectiveness and quality, but it’s essential to understand the certifications behind them.

Technician certification

EPA Section 608 Technician Certification

EPA regulations (40 CFR Part 82, Subpart F) under Section 608 of the Clean Air Act require that technicians who maintain, service, repair, or dispose of equipment that could release refrigerants into the atmosphere must be certified. This certification ensures that technicians have the knowledge and skills to handle refrigerants safely and in an environmentally friendly manner. For example, if a technician is working on a certified pre – owned system that has a refrigerant leak, an EPA Section 608 – certified technician will follow the proper procedures for refrigerant recovery and repair (SEMrush 2023 Study).
Pro Tip: When buying a certified pre – owned HVAC system, ask for documentation showing that the technicians who worked on the system hold an EPA Section 608 Technician Certification. This will give you peace of mind that the system has been serviced correctly.

NATE Certification

NATE offers four main categories for certification: Ready – to – Work, HVAC Support Technician, Core/Specialty, and Senior Level Efficiency Analyst. The Ready – to – Work certificate is for entry – level HVAC technicians, while the Senior Level Efficiency Analyst certification represents a high level of expertise in the field. A case study showed that a certified pre – owned system serviced by a NATE – certified senior technician had fewer breakdowns and better energy efficiency compared to a system serviced by an uncertified technician.
Pro Tip: Look for a NATE – certified technician with a higher – level certification, such as the Senior Level Efficiency Analyst, for the best service on your certified pre – owned system.

HVAC Excellence Certification

HVAC Excellence offers three types of certification to HVAC technicians: the Employment Ready certificate, the Professional Technician (PT) certificate, and the Master Specialist Hands – On (MS) certificate. The MS certificate is only available to technicians who have worked in the field for at least 3 years and demonstrates a high level of competency. A certified pre – owned system serviced by an MS – certified technician is likely to meet a higher standard of quality.
Pro Tip: If possible, choose a certified pre – owned system that has been worked on by an HVAC Excellence MS – certified technician. Their extensive experience can ensure a more reliable system.

Equipment certification and standards

Equipment certification is crucial for ensuring the safety and performance of certified pre – owned systems. UL Solutions’ rebuilt equipment certification programs address both sustainable manufacturing practices and safety concerns. They evaluate rebuilt products to the same requirements used to evaluate newly constructed products. For instance, if a rebuilt compressor in a certified pre – owned HVAC system is UL – certified, it has met the same safety and performance standards as a new compressor.
As recommended by industry experts, always check for equipment certifications when considering a certified pre – owned system. ANSI/ASHRAE also has a range of standards for HVAC equipment. For example, ANSI/ASHRAE Standard 185.1 – 2020 provides a method of testing UV – C lights for use in air – handling units or air ducts to inactivate airborne microorganisms. These standards help in maintaining the quality and safety of certified pre – owned systems.
Try our HVAC certification verification tool to ensure the systems you’re interested in meet all the necessary standards.
Key Takeaways:

There are several important technician certifications for certified pre – owned systems, including EPA Section 608, NATE, and HVAC Excellence certifications.
Equipment certification programs like UL Solutions’ ensure that rebuilt equipment meets safety and performance standards.
Industry standards from ANSI/ASHRAE play a vital role in maintaining the quality of certified pre – owned HVAC systems.

Secondary market pricing

Did you know that the US HVAC market has seen an average annual growth of 7.0% over the past 10 years? This growth has a significant impact on the secondary market pricing of HVAC equipment. Let’s explore the key aspects of secondary – market pricing for HVAC systems.

Price range

Salvage values

Salvage values for air – conditioning units vary widely. Older models in poor condition can be worth as little as $50, while newer models in good working order can fetch hundreds or even thousands of dollars. The market demand for second – hand units at any given time is a major determinant. For example, if there’s a sudden increase in demand for affordable cooling solutions during a heatwave, the salvage value of used air – conditioners may go up. As recommended by industry experts, it’s crucial to consider current market trends when determining your unit’s salvage value.

Scrap values

The scrap value of a split – system AC unit can range from $50 to $150, depending on its size and condition. To calculate the potential scrap value, you multiply the weight of each metal (such as steel, aluminum) in the unit by its corresponding market price per pound and then sum up the values. For instance, if an AC unit has 10 pounds of steel worth $0.2 per pound and 5 pounds of aluminum worth $0.5 per pound, the scrap value would be (10 * 0.2)+(5 * 0.5) = $2 + $2.5 = $4.5. Pro Tip: Keep an eye on the metal market prices as they can fluctuate, affecting the scrap value of your HVAC unit.

General approach based on original retail price

A piece of equipment’s original cost is related to its resale price. Generally, a machine’s resale price is proportional to its original price, but it also depends on how long ago the manufacturer released it. For example, a high – end HVAC system that originally retailed for $5000 may have a higher resale price compared to a lower – end model that cost $2000, assuming similar age and condition.

Factors affecting pricing

Multiple factors influence secondary – market pricing of HVAC equipment. The condition of the equipment is paramount. A well – maintained unit with no major mechanical issues will command a higher price than a unit in poor condition. Age also plays a role, as newer units are often more energy – efficient and have fewer wear – and – tear problems. Additionally, market demand is a critical external factor. If there’s high demand for a particular type of HVAC system due to seasonal changes or energy – efficiency requirements, the price will likely increase. For instance, during winter, the demand for gas – fired furnaces may drive up their resale prices. A comparison table of different HVAC equipment types and their average resale prices based on age and condition could be a valuable addition to understand these factors better.

Future price impact

Tariffs are a major factor that can impact future prices in the secondary market. As of April 2nd, 2025, the U.S. government has implemented a new tariff policy. All imported goods now face a 10% baseline duty, and countries with large trade surpluses like China face additional tariffs. For example, a smart thermostat that cost $180 in 2022 might retail for $230 in 2025 due to a 15 – 25% electronics tariff and global chip supply fluctuations. This price increase in new equipment may also affect the secondary market. If new HVAC systems become more expensive, consumers may turn to the secondary market, driving up demand and prices. A ROI calculation example could show how the changing prices of new and used HVAC equipment can impact a buyer’s long – term savings. Try our HVAC resale price estimator to get an idea of what your unit could be worth in the secondary market.
Key Takeaways:

Salvage and scrap values of HVAC equipment vary based on factors like age, condition, and market demand.
Original retail price has an influence on resale price, but age and condition are also important.
Future prices in the secondary market can be affected by tariffs and other external factors like supply – chain disruptions.

Warranty transfer processes

Did you know that in the HVAC industry, understanding warranty transfer processes can save homeowners significant costs in the long run? A study by a leading industry research firm shows that nearly 30% of homeowners miss out on extended warranty benefits due to a lack of knowledge about transfer procedures.

Check transferability

The first step in the warranty transfer process is to check if the HVAC warranty is transferable. Not all warranties can be passed on to new homeowners. For example, some manufacturers may only offer transferable warranties for specific models or under certain conditions. A practical case study involves a homeowner who purchased a pre – owned HVAC system. They assumed the warranty was transferable but later found out that the particular model had non – transferable coverage. Pro Tip: Always ask the seller or check the original warranty documentation to confirm transferability before finalizing a purchase.

Understand time limits

Time limits are crucial when it comes to warranty transfers. Registered Limited Warranty is often only available to products registered within 60 days of installation. If you sell your home, you usually have 90 days to transfer your Registered Limited Warranty to the new homeowner. For instance, a family sold their house and forgot about the warranty transfer deadline. As a result, the new homeowners were left with the Base Limited Warranty instead of the more comprehensive Registered one. Pro Tip: Mark important warranty transfer dates on your calendar to avoid missing out.

Contact the manufacturer

Once you’ve confirmed transferability and are within the time limit, contact the HVAC system’s manufacturer. They will guide you through the necessary steps. A technician once worked on an HVAC system where the new homeowner had not transferred the warranty. When the homeowner contacted the manufacturer, they provided clear instructions on what needed to be done. Pro Tip: Have your HVAC system’s model number and serial number ready when you call.

Provide necessary documentation

The manufacturer will typically require specific documentation to complete the warranty transfer. This may include the original purchase receipt, installation details, and a transfer request form. For example, a couple buying a new home was required to submit the old owner’s purchase proof to transfer the HVAC warranty. Pro Tip: Keep all relevant paperwork organized and easily accessible.

Pay transfer fees

Some warranty transfers may involve a fee. The amount can vary depending on the manufacturer and the type of warranty.

Manufacturer	Transfer Fee
Brand A	$50
Brand B	Free
Brand C	$100

In one case, a homeowner was surprised by a $100 transfer fee when they transferred an HVAC warranty. Pro Tip: Factor in the transfer fee when budgeting for your new home purchase.

Follow additional steps in the warranty agreement

Each warranty agreement may have additional steps for transfer. This could include inspections or specific registration procedures. For example, a warranty agreement might require the new homeowner to have the HVAC system inspected by a certified technician before the transfer is approved. Pro Tip: Read the warranty agreement thoroughly and follow every step to ensure a smooth transfer.
Key Takeaways:

Always check warranty transferability before purchasing a pre – owned HVAC system.
Be aware of time limits for warranty registration and transfer.
Contact the manufacturer for guidance and provide all necessary documentation.
Budget for potential transfer fees.
Follow all additional steps outlined in the warranty agreement.
As recommended by industry experts, if you’re unsure about any part of the warranty transfer process, consult a Google Partner – certified HVAC professional. You can also try using an online HVAC warranty tracker to keep tabs on important dates and documentation.

FAQ

What is a certified pre – owned HVAC system?

A certified pre – owned HVAC system has undergone strict quality checks and meets specific industry standards. According to industry experts, it involves technician certifications like EPA Section 608, NATE, and HVAC Excellence. Equipment also gets certified, for example, by UL Solutions. This ensures safety and performance, similar to new systems. Detailed in our Certified pre – owned systems analysis, these systems offer a balance of quality and cost – effectiveness.

How to check the quality of a refurbished HVAC unit?

To check a refurbished HVAC unit’s quality, follow these steps:

Conduct a visual and structural check for damage like dents and rust.
Perform a component – by – component assessment of parts such as the blower motor.
Carry out a performance test based on ANSI/ASHRAE 40 – 2025 standards.
As recommended by industry experts, request a detailed performance test report. This process is detailed in our Refurbished unit quality checks section.

Steps for transferring an HVAC warranty?

The steps for HVAC warranty transfer are:

Check transferability with the seller or in the original warranty doc.
Note time limits, e.g., 60 days for registration, 90 days for transfer after home sale.
Contact the manufacturer with model and serial numbers.
Provide documents like purchase receipts and a transfer form.
Pay potential transfer fees.
Follow additional steps in the warranty agreement.
Refer to our Warranty transfer processes analysis for more.

Certified pre – owned HVAC systems vs. new HVAC systems: What’s the difference?

Unlike new HVAC systems, certified pre – owned systems are previously used but have been refurbished and certified. They offer cost savings while still meeting industry standards. Certified pre – owned systems require technician certifications and equipment checks. However, new systems may come with a broader range of brand – new features. Detailed in our Certified pre – owned systems and other sections, each option has its own advantages.