The Goodman GSX16 had a good run. It was a 16 SEER condenser that sold on price and a solid warranty. Then the refrigerant rules changed, and the line was replaced.
If you are shopping for a GSX16 today, you will find the Goodman GLXS5B family instead: R-32 condensers rated at 15.2 SEER2 on the Amazon listings. Here is how they compare, what they cost, and what to ask before buying.
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What happened to the GSX16?
Amazon listings for the 2.5-ton and 5-ton GLXS5B units say they replace the GSX160301 and GSX160601 models. They use R-32 refrigerant, a newer refrigerant that replaces R-410A in new residential equipment. Efficiency is now quoted in SEER2, a stricter test than the old SEER, so the numbers are not directly comparable.
| Model | Size | Efficiency (listing) | Price |
|---|---|---|---|
| Goodman GLXS5BA3010 | 2.5 ton | 15.2 SEER2, R-32 | ~$2,341.27 |
| Goodman GLXS5BA6010 | 5 ton | 15.2 SEER2, R-32 | ~$3,799.00 |
Prices checked October 2026 and change often. These are condenser-only prices from a third-party listing. They do not include the indoor coil, labor, permits or line set.
Goodman GLXS5BA3010: the 2.5-ton
Often chosen for mid-sized homes, though only a load calculation can confirm the right size. It is a single-stage unit with a high-efficiency scroll compressor and a factory-installed filter drier. Amazon shows a 5.0 rating from only two ratings, which says almost nothing yet.
Goodman GLXS5BA6010: the 5-ton
A two-stage 5-ton unit for the largest homes or heavy loads. Two stages can mean quieter, steadier running than single-stage models. The listing price is $3,799.00 with six ratings.
The real price of a new AC
The condenser is only part of it. A full install typically includes a matching indoor coil, a line set if the old one cannot be reused, a pad, electrical work, refrigerant, permits and labor. Quotes vary widely by region. Get at least three, and ask each contractor to name the exact model numbers.
- Ask if the indoor coil is a verified match for the condenser.
- Ask about the warranty and what registration it needs.
- Ask whether the quote includes permits and removal of the old unit.
- Ask for a load calculation, not a rule of thumb.
Sizing is the step people skip. Use our AC sizing guide first, then read the model-specific reviews for the Goodman 2.5-ton and Goodman 5-ton.
Where central AC is heading
Expect R-32 and other low-GWP refrigerants to become the norm, and expect SEER2 ratings to creep up as minimum standards rise. Heat pumps are also taking market share from straight AC, because one machine cools and heats.
The catch: new refrigerants are more flammable than the old ones, which changes how techs handle and store them, and early units can cost more. Another thing to expect is more connected thermostats and monitoring, which is great until a service plan is bundled in. Compare the total ten-year cost, not just the install quote.
GSX16 vs GLXS5B: what changed
| Feature | Old GSX16 | New GLXS5B (per listings) |
|---|---|---|
| Refrigerant | R-410A | R-32 |
| Efficiency rating | 16 SEER | 15.2 SEER2 (a stricter test) |
| Compressor | Single stage (most sizes) | Single stage 2.5 ton; two-stage 5 ton |
| Availability | Being phased out | Current Goodman line |
A drop from 16 SEER to 15.2 SEER2 looks like a loss. It is not. SEER2 is tested under tougher conditions, so the new numbers read lower for similar real performance.
Questions to ask a contractor
- What size does a load calculation show for my house?
- Which indoor coil or air handler does this condenser need to match?
- What is the warranty on parts and labor, and does it need registration?
- Is the quote for this model number, and what does it include?
Ask for those answers in writing. For sizing basics, read our AC sizing guide.
What happens next: expect heat pumps to take more of the market from straight AC. Tax credits and efficiency rules have pushed that direction, and the same outdoor cabinet can often cool and heat. One more thing to expect is higher prices in the next few years as refrigerant rules and parts supply tighten. Quotes today may look cheap later.
Frequently asked questions
Is the Goodman GSX16 still sold? The GSX16 name has been replaced by the GLXS5B line in current listings. Check the model number before buying.
Can anyone install it? No. Central AC needs licensed installation, correct refrigerant handling and an electrical connection. DIY installs can void warranties.
How long do these last? Most central AC units last about 15 years with regular maintenance. Cleaning the coils and changing filters helps.
Sources
- Amazon listings for Goodman GLXS5BA3010 and GLXS5BA6010 (checked October 2026)
- Goodman GLXS5B product information
- U.S. Environmental Protection Agency, refrigerant transition guidance
- U.S. Department of Energy, SEER2 efficiency standards
