Costway 5 Ton R454B Multi-Position Central AC and Heat Pump System - 17 SEER2

Sizing a whole-home system based solely on square footage can lead to conflicting information, as many factors influence the required capacity. The most reliable method to determine the correct size (4-ton vs. 5-ton) is through a Manual J load calculation performed on-site by a licensed HVAC contractor. This calculation takes into account crucial details missed by square footage alone, such as insulation levels, window quantity and orientation, ceiling height, ductwork location and leakage, air infiltration rates, and your specific climate. Two homes of the same square footage can easily require HVAC systems with a full ton difference in capacity. We are unable to perform this calculation for your home and apologize for not being able to provide a definitive size recommendation. Regarding your concern about a compromise with a larger system, an oversized unit may satisfy the thermostat quickly and lead to short-cycling. In humid climates like Florida, this can result in the air feeling cool but remaining clammy because the unit doesn't run long enough to effectively remove moisture. If your existing 4-ton system has adequately cooled your home on peak days, this is significant evidence worth considering. Your concern about ductwork is valid. Duct capacity is determined by the system's required airflow and the static pressure within your existing duct runs. This information is not published in our product data, so we cannot estimate whether your current ducts are adequate. An HVAC contractor can measure the static pressure of your existing system and advise you directly on whether the ducts can support a larger unit. Here is a guide that explains how heating and cooling capacity is estimated and the factors that influence it: What Are BTUs? Regarding the Costway 5 Ton R454B Multi-Position Central AC and Heat Pump System - 17 SEER2, we can confirm it is a 5-ton, 17 SEER2 system utilizing R454B refrigerant. It features a multi-positional air handler, inverter technology, an operating range of 5 to 122 degrees Fahrenheit, and a 5-year warranty on the compressor and parts. A specific variable speed blower rating is not currently published in our product data, and we will verify this detail. We will forward your sizing and ductwork questions to our technical team. Once your contractor provides the load calculation results, we can help you identify the system that best matches your home's requirements.