Arkansas HVAC Load Calculation Guide
Arkansas spans humid subtropical and mixed-humid climate zones, with high summer temperatures in the River Valley and moderate Ozark Mountain elevations — a state where poultry farm ventilation and residential cooling both drive HVAC demand.
Try the Arkansas HVAC Load Calculator
Get a preliminary estimate using Arkansas-specific design temperatures. Our heating load calculator uses ASHRAE methodology with the local climate inputs below.
Design Temperatures
| Parameter | Value | Source |
|---|---|---|
| Winter Design Temperature (99%) | 13°F | ASHRAE Handbook 2021 |
| Summer Design Temperature (1%) | 100°F | ASHRAE Handbook 2021 |
| IECC Climate Zone(s) | 2A (Hot - Humid), 3A (Warm - Humid) | ASHRAE 169-2021 |
| HVAC Load Type | Cooling-Dominated | — |
Arkansas Building Codes & Energy Requirements
| Requirement | Detail |
|---|---|
| Energy Code | Arkansas Energy Code for New Building Construction (2009 IECC basis) |
| Minimum SEER | 14.0 SEER (federal minimum) |
| HVAC License Required | Yes — Arkansas Contractors Licensing Board — Mechanical Contractor license required for HVAC work |
| Average Electricity Rate | $12.04/kWh (US average: $0.1701/kWh) |
Major Cities — Design Temperature Reference
| City | Summer Design (1% DB) | Winter Design (99% DB) | Load Type |
|---|---|---|---|
| Little Rock | 96°F | 13°F | Cooling |
| Fort Smith | 100°F | 13°F | Cooling |
| Fayetteville | 97°F | 13°F | Cooling |
| Springdale | 97°F | 13°F | Cooling |
| Jonesboro | 96°F | 13°F | Cooling |
Quick Facts
- State: Arkansas (AR)
- Climate Zone(s): 2A, 3A
- Winter Design: 13°F
- Summer Design: 100°F
- Energy Code: Arkansas Energy Code for New Building Co...
- Avg. Electric Rate: $12.04/kWh
- License Required: Yes
Arkansas HVAC Challenges
- High summer humidity across the state amplifying latent cooling loads
- Tornado risk throughout most of Arkansas requiring outdoor equipment tie-down standards
- Northwest Arkansas (Bentonville/Fayetteville) Walmart campus corporate HVAC cluster
- Poultry farming ventilation — Arkansas is among the top US poultry-producing states
- River Valley humidity from the Arkansas and Mississippi Rivers
- Outdated 2009 IECC energy code leaving insulation and efficiency requirements below current best practice
Local Utilities & Resources
- Entergy Arkansas (investor-owned)
- Arkansas Electric Cooperative Corporation (cooperative)
- Empire District Electric (Liberty Utilities) (investor-owned)
Arkansas HVAC FAQ
The ASHRAE winter design temperature for Arkansas is 13°F and the summer design temperature is 100°F. These values are used for heating and cooling load calculations per ACCA Manual J methodology.
Arkansas spans 2A, 3A per ASHRAE Standard 169-2021. This classification determines minimum insulation requirements, energy code compliance path, and HVAC equipment sizing parameters.
The required HVAC size depends on home square footage, insulation levels, window area, and orientation. For a typical 2,000 sq ft home in Arkansas, use our heating load calculator with the local design temperature of 13°F (winter) or 100°F (summer) for a preliminary estimate.
Arkansas Contractors Licensing Board — Mechanical Contractor license required for HVAC work
Arkansas follows the Arkansas Energy Code for New Building Construction (2009 IECC basis). This code sets minimum requirements for HVAC equipment efficiency, duct insulation, envelope insulation, and ventilation.
Design Guides & Standards for Arkansas
Explore related resources for accurate HVAC sizing.