Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe safest approach is layered: shade sun-facing windows before the hottest hours, keep windows closed while outdoor air is hotter than the apartment, ventilate when outside becomes cooler, avoid adding heat with the oven, and use a fan only within published temperature limits. If the apartment remains dangerously hot, move to air conditioning or another cool location rather than trying to force passive measures to work.
Start with heat safety, not comfort
A heat wave can make an apartment hazardous even when it is merely uncomfortable at first. Cooling steps are useful only while the indoor conditions remain safe. The Centers for Disease Control and Prevention (CDC) advises using fans only when indoor temperatures are below 90°F. The Environmental Protection Agency (EPA) states that portable electric fans do not cool air and cautions against using them for cooling in a closed room or when the room is in the mid-90s or higher. See the CDC heat-prevention guidance and the EPA indoor-air-quality guidance.
As an Amazon Associate I earn from qualifying purchases.
If your apartment is becoming dangerously hot, someone feels unwell, or a household member is especially vulnerable to heat, use air conditioning or go to an air-conditioned place. Do not treat a fan, an open window, or a wet towel as a substitute for a cooler location in an extreme event. Call emergency services for a suspected emergency and follow public-health advice for symptoms and treatment.
Use this order of operations before the hottest hours
- Check the indoor and outdoor conditions. Note whether the apartment is currently cooler than outside, whether outdoor air quality is acceptable, and whether opening windows is secure and permitted.
- Shade windows that receive direct sun. Install removable curtains, shades, or other renter-safe coverings before morning or afternoon sunlight reaches the glass.
- Close windows while outside air is hotter. Keep the shaded windows shut during the hottest period instead of exchanging cooler indoor air for hotter outdoor air.
- Reduce indoor heat. Avoid using the oven during the hottest part of the day and postpone other avoidable heat-producing activities.
- Ventilate when conditions reverse. When outdoor air becomes cooler than the apartment, open windows if air quality, security, and building rules allow.
- Use a fan only under the temperature limits. A fan can move air across your skin, but it cannot lower the air temperature.
- Activate a backup plan early. Identify an air-conditioned location and check its hours before the apartment becomes unsafe.
Block direct sunlight from entering the apartment
Cover the windows that matter most
Prioritize windows receiving direct morning or afternoon sun. Close drapes, roller shades, or other coverings before the sun reaches the glass and keep them closed through the period of strongest exposure. Covering every window equally is less important than stopping direct radiation on the sun-facing sides of the apartment.
#1 Best Overall
- 3-in-1 Portable Air Conditioner: Enjoy cool air (64°F- 90°F) during hot summer days, plus dehumidifier and fan modes for comfortable air circulation when temperatures are milder. Everything you need for year-round comfort in one AC unit
- Comfort Sleep Mode: Sleep mode and programmable 1-24 hour timer maintain your ideal room temperature automatically. Ultra-quiet operation below 50dB won't interrupt sleep, while two adjustable fan speeds let you customize airflow
- Quick Window Installation: Comes ready to install with exhaust hose and adjustable window kit that fits widths from 20.48 to 39 inches. No handyman skills required—set up completely in just minutes and start cooling immediately（for small windows, trimming may be necessary)
- No-hassle Maintenance: Advanced Self-evaporating operation effectively reduces the frequency of manual water draining. The washable filter captures dust effectively and slides out easily for quick cleaning whenever needed—keeping air fresher longer
- Room-to-Room Versatility: Lightweight with smooth-rolling casters, this compact AC moves effortlessly wherever cooling is needed. Perfect for bedrooms, living rooms, garages—any space up to 750 square feet
Choose renter-safe coverings
Renters can usually start with removable indoor curtains, shades, or tension-mounted solutions that do not require drilling or exterior alterations. Check the lease and building rules before attaching anything to the outside of the building. Do not assume that an exterior awning, louver, reflective film, or balcony structure is allowed.
Understand indoor versus outdoor shading
EPA identifies drapes, shades, roller shades, awnings, and louvers as ways to limit solar heat. Exterior awnings and louvers can block heat before it passes through the window and may be more effective than indoor coverings, but their installation is often controlled by the landlord, condominium association, or building manager. Ask for written permission and any approved hardware rather than installing an exterior device without authorization.
Ventilate according to the temperature difference
“Keep the windows open” is not an all-day heat-wave strategy. Use the temperature difference between outdoors and indoors as the decision rule.
| Condition | Window action | Why and what to check |
|---|---|---|
| Outdoor air is hotter than indoor air | Close windows and keep sun-facing coverings shut | Opening the windows would replace cooler indoor air with hotter air. Maintain security and any required mechanical ventilation. |
| Outdoor air becomes cooler than indoor air | Open windows and coverings where practical | Use the cooler outdoor air to exchange heat, provided outdoor air quality is acceptable and the windows can be opened safely. |
| Outdoor smoke, pollution, or other poor air quality | Keep windows closed | Check local air-quality information and avoid bringing contaminated air indoors. |
| Security, storms, or building restrictions make opening unsafe | Keep windows closed | Use approved ventilation and move to a cooler location if the apartment cannot be kept safe. |
During the cooler part of the evening or early morning, open only windows that can remain secure. Close them again when outdoor temperatures rise above the indoor temperature. This conditional schedule is safer and more effective than leaving windows open continuously through the hottest hours.
Use fans for air movement, not air cooling
What a fan can and cannot do
A fan moves air and can make skin feel cooler through evaporation. It does not remove heat from the room. EPA’s exact guidance is: “Portable electric fans do not cool air.” CDC says, “Use fans, but only if indoor temperatures are less than 90°F.” Those are safety limits, not promises that a fan will reduce the room temperature.
Rank #2
- Fast, Effective Cooling for Rooms Up to 750 Sq. Ft: This 14,000 BTU portable air conditioner provides rapid spot cooling for spaces like bedrooms, home offices, or apartments up to 750 sq. ft. It helps quickly dissipate indoor heat, keeping you comfortable even on the hottest summer days.
- 3-in-1 Versatility: AC, Fan & Dehumidifier: More than just a cooler, this unit also functions as a dehumidifier and a circulating fan. It reduces excess indoor humidity and improves air circulation, delivering year-round comfort across different seasons and weather conditions.
- User-Friendly Controls & Eco-Conscious Design: The clear LED control panel makes operation easy, with a programmable 24-hour timer and Sleep Mode for convenient, quiet nighttime use. Designed with eco-friendly refrigerant, this energy-efficient AC helps cool your space while minimizing energy consumption.
- Easy to Move with Rolling Casters & Side Handles: Compact and sleek, this unit features smooth-rolling wheels and ergonomic side handles, so you can effortlessly move it from room to room — wherever cooling is needed most.
- Quick No-Drill Window Installation: The package includes a remote control and a complete window installation kit with an adjustable exhaust hose and window panels. Fits most double-hung or sliding windows, requires no drilling, and can be set up in minutes — ideal for renters or temporary cooling needs.
When not to rely on a fan
Do not use a fan as the cooling plan for a closed room that is already dangerously hot. EPA advises not using fans for cooling in a closed room or when the room is in the mid-90s or higher. If your apartment reaches those conditions, seek air conditioning or another cool place. Keep following the CDC threshold even if air movement feels temporarily comfortable.
Place a fan within the safe strategy
Use a fan only while the indoor temperature is below 90°F and combine it with shading and temperature-timed ventilation. The fan may help distribute cooler air after windows are opened, or improve comfort while the apartment remains below the threshold. Stop treating it as a cooling solution when the room temperature rises toward the unsafe range.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Stop adding heat indoors
Use the oven less
Ready.gov recommends using the oven less during extreme heat. An operating oven adds heat to the apartment at exactly the time you are trying to remove it. Prepare food without heating the kitchen when possible, or cook during a cooler period and keep the kitchen isolated from the rest of the apartment if your layout allows.
Plan heat-producing tasks around the weather
Group cooking and other avoidable heat-producing tasks into the coolest practical part of the day. Keep sun-facing coverings closed while those tasks are underway. This does not replace air conditioning, but it prevents your apartment from gaining additional heat during peak outdoor temperatures.
Consider a portable air conditioner carefully
A portable air conditioner is the most direct equipment category for an apartment without central air because it actively cools a room. It is not automatically suitable for every apartment. Before buying or operating one, verify the practical and legal requirements below.
Rank #3
- Three-in-One Unit: Our 14,000 BTU ASHRAE (10,200 BTU SACC) air conditioner also functions as a dehumidifier & fan. This portable air conditioner has a full function remote control & top mounted control panel with LED display
- Portable AC: Take this personal air conditioner (16.5” x 14.06” x 27.09) in rooms up to 700 sq. ft. Stay cool in the hot summer months and sleep well with this BLACK+DECKER ac unit for bedroom
- Smart AC with Voice Control: This smart air conditioner allows Wi-Fi connectivity and can be controlled using our mobile app available on iOS and Google Play stores, and voice controlled by Amazon Alexa or Google Assistant
- Follow Me Remote: Our portable AC unit comes with a full function remote control that features a FOLLOW ME function, which allows the remote to act as a thermostat for precise temperature control
- Installation Kit: When it comes to fans that blow cold air, this indoor ac unit includes an easy-to-install window kit. A large, vented airflow outlet ushers in cool air
- Lease and building permission: Check whether portable units, window kits, exhaust hoses, or drainage arrangements are allowed. A landlord may restrict window modifications or equipment weight.
- Window configuration: Confirm that the supplied window kit fits your window type and opening. A unit designed for a vertical sliding window may not fit a casement or unusual frame without an approved solution.
- Electrical capacity: Review the manufacturer’s electrical requirements and use an appropriate outlet. Do not overload a circuit or use an extension arrangement that the instructions prohibit.
- Exhaust routing: The hot-air exhaust must be installed exactly as the manufacturer specifies. An improvised hose or open gap can send heat back into the room.
- Drainage: Check whether the model requires a drain pan to be emptied, a hose, or another condensate arrangement. Plan where water can safely go before the unit is needed.
- Operating instructions: Follow the manual for clearances, filters, window sealing, maintenance, and shutdown procedures. Evidence does not establish that every portable unit performs equally or works in every apartment.
Portable air conditioning should be treated as a cooling option that requires compatibility checks, not as a universal answer. If the unit cannot be installed safely or legally, use a designated cool location instead of improvising.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsMake a cool-location plan before you need it
CDC recommends using air conditioning or finding a location that has it. EPA lists public cooling centers, malls, and libraries as possible options. CDC also points readers to 2-1-1, National Center for Healthy Housing cooling-center listings, and local health or emergency-management agencies. Availability, hours, transportation, and eligibility vary by location, so verify details before traveling.
Build the plan
- Identify at least one nearby air-conditioned location and one backup.
- Check opening hours, transportation, accessibility, and whether pets or children can enter.
- Save the address and phone number offline in case a heat event disrupts internet or cellular service.
- Decide how you will travel during the hottest part of the day and what water, medication, identification, or mobility equipment you need.
- Tell a trusted person where you plan to go if the apartment becomes unsafe.
Know when to leave
Leave before the apartment becomes dangerously hot, not after passive measures have failed for hours. If indoor temperatures are approaching the CDC fan limit, if the room is in the mid-90s or higher, or if anyone feels unwell, move to air conditioning or another cool location. Call emergency services for a suspected emergency.
Protect hydration and people at higher risk
CDC advises staying cool and hydrated, recognizing heat-related symptoms, and checking on people who may be more vulnerable. During a heat wave, check on older adults, young children, people with chronic conditions, people who live alone, and anyone who may have difficulty moving to a cooler place. Follow CDC and local public-health guidance for symptoms rather than relying on a personal temperature threshold.
Keep drinking water available and make it easy for household members to reach. A person who feels unwell should not be left alone to manage an increasingly hot apartment. Move them to a cooler place and seek timely medical help according to public-health guidance; call emergency services when the situation appears to be an emergency.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #4
- Three-in-One Unit: Our 12,000 BTU (8,350 BTU SACC) air conditioner also functions as a dehumidifier & fan. This portable air conditioner has a full function remote control & top mounted control panel with LED display
- Portable AC: Take this personal air conditioner (16.5” x 14.06” x 27.09) in rooms up to 550 sq. ft. Stay cool in the hot summer months and sleep well with this BLACK+DECKER ac unit for bedroom
- Smart AC with Voice Control: This smart air conditioner allows Wi-Fi connectivity and can be controlled using our mobile app available on iOS and Google Play stores, and voice controlled by Amazon Alexa or Google Assistant
- Follow Me Remote: Our portable AC unit comes with a full function remote control that features a FOLLOW ME function, which allows the remote to act as a thermostat for precise temperature control
- Installation Kit: When it comes to fans that blow cold air, this indoor ac unit includes an easy-to-install window kit. A large, vented airflow outlet ushers in cool air
Compare the available approaches
No single measure solves every apartment heat problem. Use the following comparison to decide what belongs in your plan.
| Approach | Primary role | Apartment compatibility | Important limitation |
|---|---|---|---|
| Removable indoor curtains or shades | Blocks direct solar heat through windows | Usually renter-friendly when installed without permanent alterations | Indoor coverings may be less effective than permitted exterior shading; no source-stated temperature reduction is established. |
| Exterior awnings or louvers | Blocks sunlight before it reaches the glass | Requires landlord or building approval in many rentals | Cannot be assumed to be legal or practical for a tenant to install. |
| Timed window ventilation | Exchanges indoor air when outside is cooler | Depends on safe windows, air quality, and building rules | Opening windows while outside is hotter adds heat. |
| Electric fan | Moves air across occupants and distributes air | Generally simple to deploy | It does not cool the air; CDC limits use to indoor temperatures below 90°F, and EPA warns against use in a closed room or the mid-90s and above. |
| Portable air conditioner | Active room cooling | Depends on lease, window, electrical, exhaust, and drainage requirements | Not every model fits every apartment; follow manufacturer instructions. |
| Public or private air-conditioned location | Safety backup when the apartment is too hot | Depends on local availability and transportation | Hours and access vary; confirm before traveling. |
A practical day-and-night schedule
Before sunrise or early morning
- Check whether outdoor air is cooler than the apartment and whether air quality permits ventilation.
- Open secure windows if conditions are favorable.
- Use a fan only if the indoor temperature is below 90°F.
- Complete cooking and other heat-producing tasks during the cooler period when possible.
Before direct sun reaches the glass
- Close curtains or shades on morning-facing windows.
- Prepare coverings for afternoon-facing windows before the sun shifts.
- Confirm that a portable air conditioner, if permitted and owned, has a safe exhaust and drainage setup.
During the hottest hours
- Keep windows closed while outdoor air is hotter than indoor air.
- Keep sun-facing coverings closed.
- Avoid oven use and other avoidable indoor heat.
- Use a fan only below the CDC temperature threshold.
- Monitor how people feel and leave for the planned cool location if the apartment is no longer safe.
Evening and overnight
- When outdoor air becomes cooler than the apartment, ventilate through secure windows if air quality allows.
- Close windows again when outdoor temperatures rise above indoor temperatures.
- Recheck the next day’s forecast, local heat alerts, cooling-center hours, and transportation plan.
Troubleshoot common mistakes
“The fan is on, but the room keeps getting hotter.”
The fan is moving air, not removing heat. Check the indoor temperature. If it is approaching or above 90°F, stop relying on the fan and move to air conditioning or another cool place. Also check whether windows are open while outdoor air is hotter.
“Opening every window made the apartment hotter.”
Ventilation must follow the temperature difference. Close windows during the hotter outdoor period and reopen them only when outside becomes cooler, provided air quality and security are acceptable.
“The apartment heats up through the windows despite closed curtains.”
Cover the windows before direct sunlight arrives and prioritize the sides receiving the strongest morning or afternoon sun. Ask the building manager about approved exterior shading rather than installing an unapproved awning or louver.
Recommended Free Tools
“A portable unit will not fit or cannot be drained.”
Do not improvise a window seal, exhaust route, electrical connection, or drainage system. Check the lease, window type, outlet requirements, and manual. If the unit cannot be installed as specified, use a verified air-conditioned location.
“There is no cooling center listed nearby.”
Check 2-1-1, local health and emergency-management announcements, National Center for Healthy Housing cooling-center listings, public libraries, malls, and other locations identified by local authorities. Confirm hours and access directly because listings can change during an event.
Renter checklist
- Read the lease for window coverings, exterior fixtures, portable air conditioners, and electrical equipment.
- Use removable indoor shades or curtains unless permanent installation is approved.
- Ask management which window kits and exhaust methods are permitted.
- Keep windows closed when outdoor air is hotter than indoor air.
- Ventilate only when outdoor air is cooler and safe to bring indoors.
- Do not use an electric fan as cooling for a closed room in the mid-90s or higher.
- Keep an air-conditioned destination, transportation plan, and backup contact ready.
- Check on household members and neighbors who may need help reaching a cooler place.
Bottom line
For an apartment without central air, combine early window shading, temperature-timed ventilation, reduced oven use, and carefully limited fan use. A portable air conditioner may provide active cooling only when the lease, window, electrical, exhaust, and drainage requirements all work. If the apartment approaches dangerous temperatures or anyone feels ill, stop experimenting with passive measures and go to air conditioning or another verified cool location.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
