The "new HVAC law" refers to the EPA mandate phasing out high-GWP (Global Warming Potential) refrigerants like R-410A in favor of eco-friendly alternatives like R-454B and R-32. This law aims to drastically reduce greenhouse gas emissions.
The primary 2025 HVAC regulations stem from the EPA’s mandate under the AIM Act, which restricts the use of high-Global Warming Potential (GWP) refrigerants like R-410A in newly manufactured systems. Equipment is transitioning to A2L (mildly flammable) alternatives like R-454B and R-32, which have a GWP under 750.
January 1, 2025: Manufacturers stopped producing new R-410A residential split systems and heat pumps. Equipment manufactured before this date can still be sold and installed. January 1, 2026: The original deadline for installing R-410A split systems manufactured before 2025.
The Rule of 5000 Rule is simple: Multiply the cost of the needed repair by the age of your air conditioner. If the result is greater than 5000, AC replacement is generally the smarter choice. If it's less than 5000, a repair might still be worth the investment.
Short answer: Yes. Eligible R410A systems manufactured before January 1, 2025, can still be installed in 2026 under the Technology Transitions Rule issued by the U.S. Environmental Protection Agency. There is no nationwide ban on the installation of compliant R410A equipment.
R-410A is currently being phased down rather than fully banned, with the production of new R-410A equipment already banned. The remaining supply will be gradually reduced by 85% through 2036.
Any Carrier HVAC systems installed moving forward will use Puron Advance refrigerant instead of R-410A.
The "two-foot rule" in HVAC is a duct design and installation guideline that requires a minimum of 24 inches of straight, uninterrupted space between branch take-offs (where air taps off the main trunk). It is also applied to spacing branches away from end caps, transitions, and the main plenum.
Have HVAC Prices Gone Up in 2026? Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
Which AC brand lasts the longest in 2026? Historically, Lennox, Trane, and American Standard lead the industry in longevity. With proper maintenance, these units can last 15–20 years.
Energy Savings: R-32 refrigerant has about one-third the global warming potential (GWP) of R-410A, and it also offers energy efficiency. It is efficient at transferring heat.
R-22 refrigerant typically costs between $𝟗𝟎 and $𝟐𝟓𝟎 per pound. Because R-22 has been phased out, the supply is dwindling, which causes prices to continuously climb.
A2L refrigerants, the new refrigerants for 2026, will replace R-410A in new systems. A lot about A2L refrigerants is explained in their name: The “A” means low toxicity. The “2L” is a safety classification, indicating it is mildly flammable.
If your heat pump is unexpectedly expensive to run, the most common culprits are inefficient auxiliary/backup heat, high local electricity rates, or a system that isn't sized properly.
California: Known for a higher cost of living and urban demand, HVAC salaries here can be some of the highest, averaging around $66,180 a year. New York: The bustling markets in New York also create great salary opportunities, with average annual earnings around $64,380.
In short, the 20-degree rule of air conditioning states that you should always keep your AC unit at no more than 20 degrees lower than the outside temperature. It means that, if the outdoor conditions are at 95 degrees, you should set your thermostat at no less than 75 degrees.
The best time to buy a new HVAC system is during the off-peak seasons, particularly in winter months (December through February) and early fall (September through October).
Many Amish homes are built with plenty of windows to help circulate the air and bring in the cooler overnight temperatures. They open the windows on the top floors to help the heat escape while the family retreats to the lower grounds within their homes for comfort.
In many cases, a 3-ton AC is the perfect size for a 1,500-square-foot home. However, it can be too big if your home is highly energy-efficient, as an oversized unit will "short cycle" (turn on and off too fast) and leave the air uncomfortably humid.
The answer: neither is ideal. Properly sized ductwork helps your system move air efficiently, keeps your home comfortable, and prevents unnecessary strain on your equipment.
According to the National Building Code, you need 1 sq. ft. of ventilation for every 300 sq. ft.
R-410A is currently being phased down rather than fully banned, with the production of new R-410A equipment already banned. The remaining supply will be gradually reduced by 85% through 2036.
R32 is much better for the environment: R32 has a global warming potential of 675, which is about 68 percent lower than R410A. It is not completely climate-neutral, but it is a much cleaner and more responsible choice for home cooling.
Homeowners without EPA certification are not authorized to purchase or recharge systems with r410a refrigerant. Doing so could violate federal law and void manufacturer warranties on your HVAC system. Even if you find listings online that suggest otherwise, be cautious.