HVAC During Texas Power Outages

Almost certainly not. Central AC systems require 3,000-15,000 watts starting surge, while most portable generators produce 5,000-10,000 watts maximum. Even if your running watts match, the starting surge when the compressor kicks on will overload and shut down the generator. The only portable generator option for central AC is a very large unit (10,000W+ for small AC systems) and even then it's marginal. Whole-house standby generators (14,000W+) are the practical option for running central AC during outages.

In Texas summer heat (100°F+), an unoccupied house will reach dangerous indoor temperatures (90°F+) within 2-4 hours. For healthy adults, this is uncomfortable but not immediately dangerous if you stay hydrated. However, elderly persons, infants, those with medical conditions, and pets face serious health risks within hours. The key strategy is creating one "safe room" cooled by window AC and generator rather than trying to cool the entire house.

Yes, raise your thermostat to 78-80°F during conservation alerts (typically 3-8 PM). This reduces grid strain and helps prevent broader outages. Pre-cool your house to 72-74°F before the alert period if possible - the thermal mass of your home and belongings will help maintain comfort even with reduced AC. Running your AC flat out during peak demand increases the chance of rolling blackouts affecting everyone.

For a single bedroom (150-200 sq ft), a 5,000-6,000 BTU window unit is adequate and only requires a 2,000W generator. For a master bedroom (300-400 sq ft), use an 8,000-10,000 BTU unit requiring a 3,500-5,000W generator. For a living room (400-600 sq ft) used as gathering space, a 12,000 BTU unit requiring a 5,000W+ generator works well. Buy the unit and generator now - stores sell out immediately when storms are forecasted.

Power surges when electricity is restored frequently damage AC components, particularly capacitors and control boards. The most common failure is the run capacitor - symptoms include the system humming but not starting, or the outdoor fan not spinning. This is a $150-$300 repair. More serious surge damage can affect compressor windings ($2,000-$5,000+ repair or system replacement). Whole-house surge protectors ($150-$400 installed) prevent most of this damage.

Wait at least 5 minutes after power returns before turning on AC - this allows refrigerant pressures to equalize and protects the compressor. Check your thermostat settings as many reset during outages. Turn the system on and listen for normal operation - any grinding, buzzing, or clicking sounds indicate surge damage. The system should start cooling noticeably within 15-20 minutes. If it's blowing warm air or making unusual sounds, turn it off and call for service.

For many Texas homeowners, yes - especially after experiencing Uri or other extended outages. A whole-house generator ($12,000-$25,000 installed) provides seamless protection and is the only option for running central AC during outages. Natural gas models are preferred since they don't require fuel storage. The investment typically adds $5,000-$10,000 to home resale value and provides genuine peace of mind for Texas grid uncertainty. If you work from home, have medical equipment needs, or simply can't tolerate multi-day outages, it's a worthwhile investment.

Running watts (also called rated watts) is the continuous power needed to operate equipment after it's started. Starting watts (also called surge watts) is the brief spike of power needed when motors first start up - typically 2-3x the running watts. AC compressors have large starting surges because they're starting against refrigerant pressure. Your generator must handle the starting surge, not just the running watts. This is why a 3-ton AC (3,500W running) needs a 14,000W+ generator - to handle the 8,000-10,000W starting surge.

Yes, but window units are generally more efficient and require less generator capacity for the same cooling. Portable AC units exhaust hot air through a hose to a window, but some heat leaks back in, reducing efficiency. A 12,000 BTU portable unit uses 1,100-1,400W running versus 1,000-1,200W for a similar window unit. Portable units also take up floor space and are noisier indoors. The advantage of portables is not needing permanent window installation - useful for renters or for rooms without appropriate windows.

Evaporative coolers (swamp coolers) use only 75-200W - about 1/10th of an AC unit - making them excellent for generator power conservation. They work by evaporating water into the air, which absorbs heat. However, they only work well when humidity is below 50% - which is common in West Texas but rare in humid North Texas summers. In the DFW area, evaporative coolers provide limited relief during typical humid summer days but can help during drier periods. They work best with windows open for airflow.

Absolutely - surge protectors are inexpensive insurance against power restoration damage. Options include: plug-in surge strips for window units ($20-$50), dedicated AC surge protector installed at outdoor unit ($80-$150 plus installation), or whole-house surge protector at electrical panel ($150-$400 plus installation). Whole-house protection is most comprehensive and protects all electronics and appliances. Given Texas grid volatility and common power fluctuations, surge protection is a smart investment even without considering outages.

Winter outages are actually more survivable for most homes. Space heaters use 1,000-1,500W - far less than AC - so smaller generators work. Gas fireplaces and layered clothing provide heat without any power. The main HVAC concerns during winter outages are: frozen pipes (let faucets drip, open cabinet doors), carbon monoxide from improper heating sources, and furnace damage if frozen water reaches the unit. Summer outages are harder because there's no low-power alternative to air conditioning for cooling your home to comfortable temperatures.