Summer in South Texas: Keeping Your Apartment Cool Without Wrecking Your Electric Bill

This guide is written for EWG Properties tenants in Lytle and Pleasanton, but the advice applies to any renter in South Texas. Some of it costs nothing. Some of it requires a $20 trip to Walmart. None of it requires anything you'd need landlord approval for.

Understand What You're Fighting

An apartment absorbs and holds heat. The roof bakes all day, the walls soak it in, and by 3 PM the inside of your unit is fighting both the outdoor temperature and the heat radiating off every surface. Your AC isn't just cooling air — it's battling stored heat from six hours of direct sun.

The goal isn't to run the AC harder. It's to reduce how much heat gets in and how much your unit generates internally. Every BTU you keep out is a BTU the AC doesn't have to remove.

The Thermostat Sweet Spot

The single most impactful thing you can do is stop setting your thermostat at 68°F. It doesn't cool the apartment faster — your system runs at one speed. All it does is run longer, and every degree below 72°F adds roughly 3% to your monthly bill.

The practical target for South Texas: 74–76°F when you're home, 78–80°F when you're away. That range keeps the apartment manageable without the unit running nonstop. Pair it with a ceiling fan and 76°F feels like 72°F.

If you leave for work at 8 AM and get home at 6 PM, don't let the thermostat sit at 72°F in an empty apartment all day. Set it to 80°F before you leave and pre-cool when you're on your way home. Ten degrees lower over ten hours is a meaningful chunk of your bill.

Ceiling Fans: Free Cooling You're Probably Not Using Right

If your unit has ceiling fans, make sure they're spinning counterclockwise in summer. That direction pushes air straight down, creating a wind-chill effect that makes the room feel 4°F cooler without changing the actual temperature. Most fans have a small switch on the motor housing to flip direction.

A ceiling fan running while you're in the room lets you set the thermostat 4 degrees higher with the same comfort level. Over the course of a South Texas summer, that's real money. One important rule: turn fans off when you leave the room. Fans cool people, not rooms. Running a fan in an empty room just adds heat from the motor.

Block the Heat Before It Enters

Windows are where you lose. South- and west-facing windows get direct afternoon sun — which is also peak heat hours. The fix is simple and costs almost nothing:

• Close blinds and curtains on south and west-facing windows from about 10 AM to 4 PM. This alone can reduce heat gain by 30–40%.
• Blackout curtains are a step up from standard blinds — available at Walmart for $15–25 a panel and they make a real, noticeable difference in a west-facing room.
• Open windows at night when temperatures drop into the 70s. Cross-ventilation for even an hour before bed flushes out built-up heat and gives your AC a head start on the morning.

Stop Adding Heat Inside

Your appliances generate heat. In winter that's a bonus. In a South Texas summer, every appliance you run is fighting your AC.

• Oven: Baking or roasting heats the entire unit. Switch to a microwave, air fryer, or stovetop for hot meals during summer. If you have to use the oven, do it in the morning before peak heat builds, or after 8 PM when outdoor temperatures are falling.
• Clothes dryer: One of the biggest heat producers in an apartment. Run it at night or early morning — not at 3 PM when it's 102°F outside and your AC is already working hard.
• Dishwasher: The dry cycle generates significant heat. Use the air-dry setting, or just crack the door open after the wash cycle finishes and let dishes air dry.
• Incandescent bulbs: If you still have any, swap them for LED. Incandescents convert 90% of their energy to heat. LEDs run cool and use a fraction of the power.

Change Your AC Filter — This One Is Non-Negotiable

A dirty AC filter is the most common reason an apartment stays hot even with the AC running. A clogged filter restricts airflow, which makes the system work harder, run longer, cool less efficiently, and wear out faster.

Filters should be changed every 1–3 months depending on conditions — more often if you have pets or if there's construction nearby kicking up dust. A fresh filter takes five minutes to swap and can noticeably improve how well your unit cools.

Seal the Gaps

Cold air leaks out the same places hot air sneaks in. Check the gaps around your front door — if you can see daylight around the frame or feel warm air pushing through, that's conditioned air escaping every minute the AC runs.

A door draft stopper (under $10) handles the bottom gap. If you notice significant air infiltration around window frames or door edges, let us know through a maintenance request — that's something we can address with weather stripping.

Quick-Win Checklist

When to Call Us

If you've done the basics — clean filter, shades closed, reasonable thermostat — and your apartment is still not getting below 80°F on a hot day, something is wrong with the system. Common culprits: low refrigerant, a dirty evaporator coil, a failing compressor, or ductwork issues.

None of those are tenant fixes. Submit a maintenance request through TenantCloud or call (210) 698-6900 directly. During summer we treat AC calls as priority maintenance — you shouldn't be sitting in a sweltering apartment waiting for a callback.