Table 5.
Heat pump sizing and economizer logic for each location. Supply airflow rates per person assume 27 occupants.
| IECC Climate Zone | City | HVAC System Model | Heat Pump Capacity (Cool/Heat) (kW) | Electric Resistance Heat Capacity (kW) | Maximum Outdoor Airflow rate (l/s) Total (per person) |
Economizer High-Limit Outdoor Air Temp (°F) |
|---|---|---|---|---|---|---|
| 1A | Miami | W60HC | 16.0/15.0 | 4.0 | 825.9 (30.6) | 20.56 |
| 2A | Houston | W60HC | 16.0/15.0 | 4.0 | 825.9 (30.6) | 20.56 |
| 2B | Phoenix | W60HC | 16.0/15.0 | 4.0 | 825.9 (30.6) | 22.78 |
| 3A | Atlanta | W48HC | 13.9/12.1 | 4.0 | 731.5 (27.1) | 20.56 |
| 3B | Las Vegas | W60HC | 16.0/15.0 | 4.0 | 825.9 (30.6) | 22.78 |
| 3B-AC | Los Angeles | W24HB | 6.9/6.6 | 4.0 | 377.6 (14.0) | 22.78 |
| 3C | San Francisco | W18HB | 5.1/4.9 | 4.0 | 283.2 (10.5) | 22.78 |
| 4A | Baltimore | W36HB | 10.6/9.3 | 6.0 | 542.7 (20.1) | 20.56 |
| 4B | Albuquerque | W36HB | 10.6/9.3 | 4.0 | 542.7 (20.1) | 22.78 |
| 4C | Seattle | W18HB | 5.1/4.9 | 4.0 | 283.2 (10.5) | 22.78 |
| 5A | Chicago | W24HB | 6.9/6.6 | 15.0 | 377.6 (14.0) | 20.56 |
| 5B | Denver | W36HB | 10.6/9.3 | 5.0 | 542.7 (20.1) | 22.78 |
| 6A | Minneapolis | W36HB | 10.6/9.3 | 20.0 | 542.7 (20.1) | 21.67 |