To size a PTAC unit correctly, match the amperage to your building’s circuit breaker size. 15 amp breakers require 15 amp PTACs, 20 amp breakers need 20 amp units, and 30 amp breakers accommodate 30 amp PTACs.  The amperage determines both the unit’s electrical draw and its heating capacity. While you can upgrade breakers, you cannot upgrade the wiring already in your walls, so PTAC selection must match your…

Tip 1: Properly Sizing A Unit For Your Space When you’re searching for the best PTAC unit for your particular application, the most important consideration to start with is sizing the unit for your space. While there are general guidelines based on square footage for how many BTUs the unit will need to churn out,…

Heating and cooling loads are calculated using the Manual J method, which measures how many BTUs per hour a space needs to stay at a set temperature. The calculation accounts for square footage, insulation quality, window area and type, local climate data, and internal heat sources like occupants and appliances.  Get the number wrong and…

(Before You Call a Technician Again, Read This) So, you called someone out to fix your unit. They fixed it, you paid, and that was that. Then it broke again. Different problem, same story. And you kept saying yes because honestly, what else would you do? The thing still runs. Replacing it feels like a…