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Decoding HVAC Tonnage
SBS-NC, LLC Commercial HVAC and Electrical • Aug 03, 2023

Unraveling the Differences Between 10 Ton and 15 Ton HVAC Units




     As you venture out to purchase a new HVAC unit for your commercial establishment in Winston-Salem, NC, you may come across a range of choices, from 10 ton to 15 ton units and beyond. You may wonder about the differences between these units, and more importantly, their implications in terms of cooling capacity, energy efficiency, and overall cost. This guide aims to demystify these queries, enabling you to make an informed decision that suits your AC repair and installation needs.


     Before diving into comparisons, it's crucial to understand what HVAC tonnage signifies. Rather than indicating weight, it refers to the cooling capacity of an air conditioner, demonstrating how much heat it can expunge from a space within an hour. Specifically, a single ton of cooling is equivalent to 12,000 BTU (British thermal units) per hour, with a BTU being the heat necessary to elevate the temperature of a pound of water by one degree Fahrenheit. Accordingly, a 10 ton HVAC unit can eradicate 120,000 BTU of heat per hour, while a 15 ton unit is capable of eliminating 180,000 BTU per hour.


     The perfect HVAC unit size is paramount for achieving the best performance and energy efficiency. Opting for a smaller unit might result in inadequate cooling, thus leading to discomfort and escalating energy bills. Conversely, a larger unit might frequently cycle on and off, causing energy wastage and wearing out the components. To determine the best HVAC unit size for your establishment, consider factors like:

  • Your space's square footage
  • Layout and design of your space
  • Number and types of windows and doors
  • The insulation and ventilation within your space
  • Local climate and weather conditions
  • Occupancy and activity level within your space

     An expert HVAC contractor can conduct a load calculation to gauge your space's cooling load, guiding you towards the best-suited HVAC unit size. Call SBS today!


     A 15 ton HVAC unit offers superior cooling capacity compared to a 10 ton unit, making it an ideal choice for larger or hotter spaces. It guarantees even temperature distribution across your space, eliminating hot and cold spots. Additionally, a 15 ton unit might come with advanced features like variable speed compressors and fans, offering better comfort and efficiency by adjusting the cooling output as per demand.

However, drawbacks of a 15 ton HVAC unit include:

  • Higher upfront costs compared to a 10 ton unit
  • Increased installation cost due to greater size and weight
  • Elevated operating costs due to more energy consumption
  • Higher maintenance costs owing to intricate components


     A 10 ton HVAC unit, suitable for smaller or cooler spaces, promises potential savings on the unit's initial purchase, installation, and operation. It also tends to produce less noise and vibration than a 15 ton unit, contributing to better indoor environmental quality.

However, a 10 ton HVAC unit may have limitations like:

  • Inferior cooling performance compared to a 15 ton unit
  • Less precise temperature control than a 15 ton unit
  • Reduced durability compared to a 15 ton unit
  • Lower resale value compared to a 15 ton unit


     Ultimately, the choice between a 10 ton and a 15 ton HVAC unit for your commercial building hinges on your specific needs, preferences, and budget. It is recommended to consult a reputable HVAC contractor in Winston-Salem, NC, who can conduct a detailed assessment of your space, execute a load calculation, and propose the optimal solution for your AC repair and installation requirements.



     For reliable and affordable HVAC services in Winston-Salem, NC, consider SBS-NC, LLC . With over 30 years of providing quality workmanship and ensuring customer satisfaction, we also offer free estimates, a range of financing options, and warranties on all our products and services. To schedule your appointment, contact us today! Call us today!



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