Goodman 3.5 Ton 13 SEER 410A Compatible Air Conditioner Model GSX130421

The Goodman 3.5 Ton 13 SEER 410A Compatible Air Conditioner Model GSX130421 is equipped with many advanced features that ensure a comfortable home or space. These features range from the energy-efficient compressor that is designed to provide years of reliable cooling comfort, to the single-speed condenser fan motor that provides dependable, quiet airflow across the condensing coil.

Retail Price : $1,706.00

Wholesale Price : $1,227.00

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As low as $30.37 per month


The Goodman brand provides energy-efficient, reliable, and cost-effective heating and cooling services to millions of customers. Goodman takes great pride in their manufacturing practices and processes, which always result in the production of quality HVAC equipment and returning customers. More than anything, though, the Goodman brand prides itself on providing peace of mind to its customers by offering strong warranties and products that have been tested numerous times for quality assurance. All of these factors make the Goodman brand the obvious choice for your next HVAC purchase. 

Product Features:

  • Energy-efficient compressor 
  • Factory-installed filter drier 
  • Copper tube/aluminum fin coil 
  • Service valves with sweat connections and easy-access gauge ports 
  • Contactor with lug connection 
  • Ground lug connection 
  • AHRI Certified; ETL Listed

3.5 Ton Air Conditioner

This GSX130421 condenser is a 3.5 ton AC only unit. This means that in an ideal climate situation, this model can usually cover a medium sized house. For this unit to function, it requires an indoor air handler or coil. Please note that this unit is cooling only with no heating capacity on its own.


This Goodman GSX130421 AC condenser is designed to be 13 SEER. This is the lowest efficiency on the market today, making it a good inexpensive option for northern states. This product is regulated by DOE Efficiency Standards.

Picking out the Perfect Air Conditioner:

To find the desired tonnage for your air conditioner, you’ll first need to calculate the square footage of the space that you’re trying to cool. Typically, the average home requires one ton of air conditioning per 400 to 1,000 square feet. There is a lot of variation in this number since you’ll also need to factor in how many windows the space has and how tall the ceilings are, as these things dictate how easily air flows through your space. 

After you have discovered what tonnage will work best for your space, you will then move on to figure out what SEER, or Seasonal Energy Efficiency Ratio, you want your new unit to possess. Essentially, the SEER rating measures the air conditioner's efficiency, which is calculated using the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. Similar to the miles per gallon for a car, an air conditioner's SEER rating is the maximum efficiency rating for the unit. So, the higher the SEER rating, the more efficient the air conditioner will be, likely resulting in lower utility bills and other added benefits. However, it is also important to note that the efficiency of your air conditioning system can also depend on the size of the space you're attempting to cool, your current ductwork, and other variables.

However, before making a purchase, you should always check first with your qualified installer to figure out what unit is best for your home or space. If you have questions about installation, air conditioner size calculation, or something else, please contact our technicians!


This product comes with a 10-year parts limited warranty when installed by a qualifying technician and then registered on the manufacturer's website.

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