Goodman 3.5 Ton 14 SEER 410A Compatible Air Conditioner Model GSX140421

The Goodman 3.5 Ton 14 SEER 410A Compatible Air Conditioner Model GSX140421 is equipped with many advanced features that ensure a comfortable home or space. These features range from the single-speed condenser fan motor that provides dependable, quiet airflow across the condensing coil to the energy-efficient compressor that is designed to provide years of reliable cooling comfort.

Retail Price : $1,920.00

Wholesale Price : $1,375.00

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As low as $34.03 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 brand the obvious choice for your next HVAC purchase. That’s why we carry Goodman

Product Features: 

  • Energy-efficient compressor 

  • Single-speed condenser fan motor 

  • 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 Goodman condenser is a 3.5 ton AC only unit. That means in an ideal climate situation, this unit can usually cover a medium-sized house. An indoor air handler or coil is required for this unit to function, and this unit is cooling only with no heating capacity on its own.


Curious about this air conditioner SEER rating? The Goodman AC-only conditioner can be up to 14 SEER in efficiency when paired with the proper equipment. Every SEER point is 5-7% more efficient than the one lower than it, which means the higher the SEER rating of the unit, the more money you’ll save. Please note that 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. Read more about how to choose the perfect air conditioner for your home

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. 

Curious about air conditioner size calculation or other air conditioning and heating questions? Don’t hesitate to ask 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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