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Calculate the right HVAC size for your home in Washington, DC.
Design temperatures: 96°F summer / 29°F winter
Total conditioned living space
Cooling Load
50,743
BTU/hr
Heating Load
104,553
BTU/hr
Recommended Size
5 Ton
System Capacity
Est. Monthly Savings
$19
High-efficiency upgrade
Estimated System Cost
Equipment + professional installation
$15,750 - $29,250
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.
By using this tool or submitting your information, you consent to be connected to a vetted local professional in our network. You may receive calls or texts at the number provided. Standard message and data rates may apply.
ASHRAE design conditions for 20421
Average costs in Washington
Typical homes in 20421
Federal Energy Efficiency Tax Credit
federal incentive • Expires 2032-12-31
Up to $2,000
HVAC service calls in Washington, DC typically range from $91 to $241 for standard repairs. Emergency service is available 24/7 at approximately $212.
Yes, most hvac work in Washington County requires a permit. The average permit cost is $75. Our licensed contractors handle all permit requirements.
Our network of 19+ licensed contractors in the Washington area offers average response times of 69 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 96°F and winter design temp of 29°F in 20421, proper sizing is critical. Use our Manual J calculator above for an estimate.