HVAC for Specific
Situations
Generic HVAC advice assumes you own a single-story home with no special circumstances — reality is more complicated. Renters have different options (and rights) than owners. Two-story homes face physics that defeat single-zone systems. This section addresses situations standard guides ignore.
Renters
Texas Property Code establishes minimum habitability standards that include functional air conditioning.
Landlord Obligations
- Maintain AC in working condition
If unit was provided with AC
- Respond to repair requests within reasonable time
7 days often considered reasonable
- Cannot retaliate against tenants who request repairs
Texas Property Code protection
Key statute: Texas Property Code § 92.052-92.056
When Landlord Won't Fix AC
- 1. Send written notice (email creates documentation) with date, problem description, request for repair within 7 days
- 2. If no response, send follow-up notice referencing first and stating you'll pursue legal remedies
- 3. Legal remedies include repair-and-deduct, rent reduction claim, lease termination, or code enforcement
Important: Follow proper procedures. Improper rent withholding can result in eviction.
What You CAN Control as a Renter
- Change filters regularly (reduces energy costs you may pay)
- Keep outdoor unit clear
- Report issues promptly (delays can be held against you)
- Document everything (photos, dates, communications)
Two-Story Homes
Heat rises. Upstairs rooms can be 5-10°F warmer than downstairs. Single-zone systems can't solve this — when downstairs reaches setpoint, the system shuts off while upstairs is still too warm.
Solutions by Effectiveness
Zoning system
Most effectiveSeparate zones with independent thermostats and dampers
Ductwork balancing
ModerateAdjust dampers to increase upstairs airflow
Supplemental mini-split
Effective for specific roomsAdd dedicated cooling to problem room
Fan and setpoint strategies
LimitedCeiling fans + set thermostat 2-3°F lower than desired
New Construction Recommendation
For new two-story homes, specify a zoning system during construction. Retrofit cost is higher than including during initial install.
Power Outages
Texas operates on an isolated power grid (ERCOT) with no ability to import power during emergencies. Backup power is more valuable here than in states with grid interconnection.
During Extended Outages
- 1 Turn AC thermostat to "off" (prevents compressor damage at power restoration)
- 2 Open windows if outdoor temp is tolerable
- 3 Close blinds on sun-facing windows
- 4 Relocate vulnerable persons if needed
Generator Reality Check
Most portable generators cannot run central AC:
- • 3-5 ton AC requires 3,000-5,000+ watts starting surge
- • Typical portable generator: 3,000-4,500 watts running
- • Undersized generator risks damaging AC compressor
Backup Cooling Options
| Option | Cost | Capability |
|---|---|---|
| Whole-house generator | $10,000-$20,000 installed | Only option for running full central AC during outages |
| Portable AC | $300-$600 | Can cool single room on generator power (1,000-1,500 watts) |
| Window AC unit | $150-$400 | Lower wattage, can run on most portable generators |
Whole-house generator
$10,000-$20,000 installed
Only option for running full central AC during outages
Portable AC
$300-$600
Can cool single room on generator power (1,000-1,500 watts)
Window AC unit
$150-$400
Lower wattage, can run on most portable generators
Seniors
Older adults face higher risks during AC failure: reduced ability to regulate body temperature, medications that affect heat tolerance, and mobility limitations.
Maintenance Priority
- Professional tune-up before summer (not optional)
- Fresh batteries in CO detectors
- Emergency contact list posted
Safety Features
- Wi-Fi thermostat with remote alerts
- Wellness check arrangements during heat waves
- Backup cooling plan documented
Equipment Considerations
- Reliability over efficiency (avoiding failure matters most)
- Maintenance plan with priority service
- Consider replacing aging equipment proactively
Articles in This Section
By Living Situation
By Home Type
Situations FAQ
Common questions about specific HVAC circumstances
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