ASHRAE-90.1-2022- - Page 325
Extracted Content
| Table G3.1.1-3 Baseline HVAC System Types | Col2 | Col3 |
|---|---|---|
| Building Area Types a, Number of Stories b, and Combined Floor Area c | Climate Zones 3B, 3C, and 4 to 8 | Climate Zones 0 to 3A |
| Residential | System 1—PTAC | System 2—PTHP |
| Public assembly area smaller than 120,000 ft2 | System 3—PSZ-AC | System 4—PSZ-HP |
| Public assembly area equal to or larger than120,000 ft2 | System 12—SZ-CV-HW | System 13—SZ-CV-ER |
| Heated-only storage | System 9—Heating and_ventilation_ | System 10—Heating and_ventilation_ |
| Retail in a_building_ that is 1 or 2_stories_ | System 3—PSZ-AC | System 4—PSZ-HP |
| Hospital that is either • larger than 150,000 ft2 or • in a_building_ greater than 5_stories_. | System 7—VAV with_reheat_ | System 7—VAV with_reheat_ |
| Hospital—all other | System 5—Packaged_VAV_ with reheat | System 5—Packaged_VAV_ with_reheat_ |
| Other_Nonresidential_ area that is both • smaller than 25,000 ft2 and • in a_building_ 3_stories_ or fewer. | System 3—PSZ-AC | System 4—PSZ-HP |
| Other_Nonresidential_ area that is both • smaller than 25,000 ft2 and • in a_building_ with 4 or 5_stories_. | System 5—Packaged_VAV_ with_reheat_ | System 6—Packaged_VAV_ with PFP boxes |
| Other_nonresidential_ area that is both • 25,000 ft2 to 150,000 ft2 and • in a_building_ that is 5_stories_ or fewer. | System 5—Packaged_VAV_ with_reheat_ | System 6—Packaged_VAV_ with PFP boxes |
| Other_Nonresidential_ area that is either • larger than 150,000 ft2 or • in a_building_ greater than 5_stories_. | System 7—VAV with_reheat_ | System 8—VAV with PFP boxes |
a. Building area type determined in accordance with Section G3.2.1.1. b. The total number of stories in a building, including above-grade and below-grade stories but not including stories solely devoted to parking. c. Combined gross conditioned floor area and semiheated floor area, of the building area type, based on the requirements of Section G3.2.1.1.
Table G3.1.1-4 Baseline System Descriptions
| System No. | System Type | Fan Control | Cooling Type a | Heating Type a |
|---|---|---|---|---|
| 1. PTAC | Packaged terminal air conditioner | Constant volume | Direct expansion | Hot-water_fossil fuel_ boiler |
| 2. PTHP | Packaged terminal heat pump | Constant volume | Direct expansion | Electric heat pump |
| 3. PSZ-AC | Packaged rooftop air conditioner | Constant volume | Direct expansion | Fossil fuel furnace |
| 4. PSZ-HP | Packaged rooftop heat pump | Constant volume | Direct expansion | Electric heat pump |
| 5. Packaged_VAV_ with reheat | Packaged rooftop_VAV_ with_reheat_ | VAV | Direct expansion | Hot-water_fossil fuel_ boiler |
| 6. Packaged_VAV_ with PFP boxes | Packaged rooftop_VAV_ with parallel fan power boxes and_reheat_ | VAV | Direct expansion | Electric resistance |
| 7. VAV with_reheat_ | VAV with_reheat_ | VAV | Chilled water | Hot-water_fossil fuel_ boiler |
| 8. VAV with PFP boxes | VAV with parallel fan-powered boxes and_reheat_ | VAV | Chilled water | Electric resistance |
| 9. Heating and_ventilation_ | Warm air furnace, gas fired | Constant volume | None | Fossil fuel furnace |
| 10.Heating and_ventilation_ | Warm air furnace, electric | Constant volume | None | Electric resistance |
| 11.SZ–VAV | Single-zone_VAV_ | VAV | Chilled water | See note (b). |
| 12.SZ-CV-HW | Single-zone system | Constant volume | Chilled water | Hot-water_fossil fuel_ boiler |
| 13.SZ-CV-ER | Single-zone system | Constant volume | Chilled water | Electric resistance |
a. For purchased chilled water and purchased heat, see Section G3.2.1.3. b. For Climate Zones 0 through 3A, the heating type shall be electric resistance . For all other climate zones the heating type shall be hot-water fossil- fuel boiler .
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 323