AC Replacement and the 2026 Refrigerant Transition
By Cooley Mechanical Heating & Air | June 16, 2026
A refrigerant change does not answer every replacement question. Before comparing prices, find out whether the proposal repairs your existing air conditioner or installs a new system, which components it includes, and how the equipment will be matched to your home.
New-system restrictions and existing-system repairs are different
The EPA Technology Transitions sector table lists a 700 global-warming-potential limit for new residential and light-commercial air-conditioning and heat-pump systems. Its current exception lists no installation compliance date when all specified components were manufactured or imported before January 1, 2025. That condition concerns every specified component, not just the outdoor unit.
Ask the installer to check the applicable equipment category, component records and current rule before relying on an exception. The EPA table is an overview; the regulation supplies the complete requirements. Do not treat a date in an older article as a rule for every product, system or installation.
EPA’s guidance for existing equipment says existing systems may continue to be used and repaired. Later-manufactured R-410A components designated for servicing existing equipment do not create permission to assemble an unrestricted new R-410A system. A repair-versus-replacement decision still needs a diagnosis and a clear description of the work.
Check the refrigerant specified for the equipment
R-454B and R-32 are examples of refrigerants used in newer equipment; neither is a universal replacement fluid for an existing R-410A system. EPA’s guidance prohibits using these mildly flammable refrigerants in equipment not designed for them.
A proposal should identify the exact refrigerant and compatible equipment. Ask which manufacturer’s installation and commissioning instructions apply, including any required detection components or controls. Refrigerant work belongs with appropriately trained service personnel; it is not a homeowner refill or conversion task.
Ask for the actual certified equipment combination
The outdoor unit’s label alone does not identify the rating of every possible indoor and outdoor combination. Ask for the exact outdoor unit, indoor coil, furnace or air handler, and applicable blower configuration.
Use the AHRI Directory of Certified Product Performance to check the proposed combination and its certified capacity and efficiency. Match the certificate to the equipment on the proposal. A certification describes the tested combination; it does not document airflow at your house or guarantee your utility bill.
For an AirEase proposal, compare the exact equipment with the official AirEase air-conditioner information and applicable product documents. Confirm availability and included features in writing rather than assuming a model or accessory is part of every installation.
Check the home and ducts before selecting capacity
Ask what cooling-load calculation supports the proposed size. ACCA Manual J provides the residential calculation method. The old unit’s size and the home’s floor area alone are not a complete explanation.
Describe uneven temperatures, noise or weak airflow. Request a supply-and-return review and any appropriate airflow and static-pressure measurements, interpreted against the equipment data. A list of symptoms does not identify a failed part or prove that a larger air conditioner is needed.
For ductwork concerns, see the existing Washington Township air-duct installation and repair page. This article reports no particular home’s measurements or installation outcome.
Get the installation and startup scope in writing
ENERGY STAR’s quality-installation guidance covers sizing, airflow, refrigerant charge and ducts. Use those topics to compare what each proposal includes.
- Equipment models, rated combination and controls.
- Duct, filter, refrigerant-line, drainage and electrical work included in the price.
- Applicable manufacturer startup checks and the results you will receive.
- Work excluded from the proposal and how additional work would be approved.
- Written parts and labor coverage, registration responsibilities and owner instructions.
These are assessment and proposal questions, not evidence that the checks have already been completed at your property. Review Cooley Mechanical’s financing information separately from the equipment specifications; any payment terms belong in the applicable offer.
Decide on repair or replacement from the findings
Ask what failed, what a repair would address and what problems would remain. Compare the repair scope with a complete replacement proposal, including equipment condition, repeated faults, comfort concerns, compatibility and the installation work needed.
The refrigerant name alone is not a diagnosis. An existing R-410A system is not automatically due for replacement because newer systems use another refrigerant. Conversely, the ability to obtain a service component does not establish that a repair is the best choice for a particular system.
Did cooling fade again after refrigerant service?
If cooling improved after a service visit and then faded again, tell the technician how long the improvement lasted and what the earlier work included. Recurrence calls for assessment; it does not identify a leak location or automatically make replacement the right choice.
A visual check and a leak test answer different questions
A technician’s visual inspection can identify damage or other clues in accessible areas. Seeing nothing obvious does not, by itself, establish that the refrigerant circuit is leak-free. Further testing may involve an electronic leak detector or a controlled nitrogen pressure test, selected for the equipment, refrigerant and findings. Ask what the proposed test can establish and what it cannot rule out.
Agree on the next step before authorizing it
Ask which areas will be assessed, why that method is appropriate, what access is needed, and what the charge includes. If part of the refrigerant circuit needs to be isolated for testing, have the technician explain that additional work and its limits. Clarify what findings you will receive and when further repair approval would be requested.
Ask for findings and repair verification
- Findings: What was observed or measured, whether a leak was located, and which areas could not be assessed.
- Recommendation: What the proposed repair addresses, what remains uncertain, and whether more investigation is needed.
- After an approved repair: What was repaired, how it was checked afterward, and the recorded results under the applicable manufacturer instructions.
For example, one Daikin Comfort Technologies model-specific service manual requires the pressure test to be repeated after a leak repair. Your equipment’s own instructions govern the procedure; this example is not a test specification for every system.
Have the service history ready
Gather prior invoices, service dates, any recorded refrigerant additions, and the symptoms you notice now. Share model information if it is safely accessible without opening equipment. Leave refrigerant work to qualified personnel; EPA’s Section 608 technician-certification guidance explains the federal certification requirement for technicians who service covered equipment.
Discuss your existing air conditioner
For diagnosis and replacement planning, use air-conditioning services in Washington Township. Share what the system is doing, when the problem started and any known repair history.
Macomb, Oakland and Lapeer are the primary service counties. Check service availability by county for other locations. Requests may be submitted at any time; service and appointments are subject to availability and confirmation.