If your landlord is unwilling to replace the old AC unit and you're looking for ways to keep your house cooler and reduce humidity, here are some suggestions:
Use fans: Place portable fans strategically around your house to improve air circulation. Ceiling fans can also be effective in keeping the air moving and creating a cooling breeze.
Close curtains or blinds: Keep your curtains or blinds closed during the day to block out the heat from direct sunlight. This can help maintain a cooler temperature indoors.
Ventilate during cooler hours: Open windows and doors during the cooler parts of the day, such as early morning or late evening, to allow fresh air to circulate. Use window screens to prevent insects from entering.
Minimize heat sources: Turn off or unplug unnecessary heat-producing appliances and devices, such as computers, lights, and kitchen appliances. Use them sparingly, especially during the hottest parts of the day.
Utilize shading techniques: If possible, create shade outside your windows by using awnings, sunshades, or planting trees or shrubs strategically. This can help reduce the amount of heat entering your home.
Insulate and seal: Ensure that your home is properly insulated and sealed to prevent heat from infiltrating. This includes sealing gaps around doors, windows, and other potential air leaks. Weatherstripping and caulking can be used for this purpose.
Use natural cooling methods: Take advantage of natural cooling methods, such as cross ventilation by opening windows on opposite sides of the house to allow a breeze to pass through. You can also create a DIY swamp cooler by placing a bowl of ice in front of a fan to cool the air.
Manage humidity: Use dehumidifiers to reduce indoor humidity levels, especially during humid weather. This can help make your home more comfortable.
Optimize nighttime cooling: Take advantage of cooler temperatures at night by opening windows to allow cool air inside. Use fans to circulate the cool air throughout your home.
Communicate with your landlord: Keep the lines of communication open with your landlord and express your concerns about the high temperatures and humidity in your home. They may be more willing to address the issue or consider alternative solutions if they understand the impact it has on your comfort.
Remember to prioritize your safety and well-being. If the high temperatures become unbearable or pose health risks, consider seeking temporary alternative accommodations until the situation is resolved.