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When a rental’s air conditioner breaks, the payment question is not decided simply by monthly rent versus jeonse. Ownership, whether the unit was included in the lease, and the cause all matter. Before arranging repairs, notify the landlord and save the diagnosis, estimate, approval, and receipt. #RentalRepairs

Give your AC room to breathe. Objects near the outdoor unit can send hot exhaust air back into the intake, reducing cooling performance and potentially triggering shutdowns. Keep vents clear, fully open louvered windows during operation, and follow your model’s installation manual for required clearances. #AirConditionerSafety

Wondering what your air conditioner really adds to the electricity bill? Estimate energy use by multiplying power consumption by operating time and load factor, then compare your household’s total bill before and after AC use under Korea’s tiered rates. #ElectricityCosts

OpenAI has reshaped the cost-speed equation for GPT-5.6. Luna now costs $0.20 per million input tokens and $1.20 per million output tokens, while Sol’s Fast mode offers up to 2.5× the speed at twice the Standard price. The practical strategy: use Sol for planning and Luna or Terra for execution and verification. #OpenAI

AI can make a task faster without making the business more profitable. First, compare demand generation, purchase conversion, and service delivery to find the real constraint. Then eliminate unnecessary work, simplify the process, and automate what remains. #BottleneckManagement

When every report and decision lands on one leader’s desk, diligence cannot prevent an organization-wide bottleneck. Effective delegation means defining decision authority, limits, and exception-reporting rules—while giving employees room to build judgment and responsibility. #Delegation