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Calculate the right HVAC size for your home in Austin, TX.
Design temperatures: 107°F summer / 47°F winter
Total conditioned living space
Cooling Load
72,534
BTU/hr
Heating Load
51,810
BTU/hr
Recommended Size
5+ Ton (Multi-zone recommended)
System Capacity
Est. Monthly Savings
$27
High-efficiency upgrade
Estimated System Cost
Equipment + professional installation
$22,750 - $42,250
Before rebates and incentives
This is a simplified estimate based on Manual J principles. An on-site assessment by a licensed HVAC contractor is required for accurate sizing. Factors like ductwork condition, air sealing, and specific window types affect the final recommendation.
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ASHRAE design conditions for 78742
Average costs in Austin
Typical homes in 78742
Federal Energy Efficiency Tax Credit
federal incentive • Expires 2032-12-31
Up to $2,000
HVAC service calls in Austin, TX typically range from $96 to $246 for standard repairs. Emergency service is available 24/7 at approximately $219.
Yes, most hvac work in Austin County requires a permit. The average permit cost is $75. Our licensed contractors handle all permit requirements.
Our network of 27+ licensed contractors in the Austin area offers average response times of 52 minutes. Emergency service is available 24/7.
HVAC sizing depends on your home's square footage, insulation, and local climate. With a summer design temperature of 107°F and winter design temp of 47°F in 78742, proper sizing is critical. Use our Manual J calculator above for an estimate.