Carrier 58PAV045-08 furnace filter size
This furnace takes a 16 x 25 x 1 filter (side return) or a 14 x 25 x 1 filter (bottom return), depending on where the return air comes in.
Every filter option for this model
| Where return air enters | Filter size (inches) | How many |
|---|---|---|
| side | 16 x 25 x 1 | 1 |
| bottom | 14 x 25 x 1 | 1 |
Where the filter goes
Inside furnace (filter retainer, side or bottom). SI p7 Table 3: '† Factory-provided with the furnace.'
The maker ships a filter with this furnace.
How often to change it
General guidance, not from the maker's table: 1-inch filters every 1 to 3 months; 4- and 5-inch filters every 6 to 12 months. Change sooner with pets, smoking or construction dust.
About this model
| Cabinet width | 14.2 in. |
|---|---|
| Airflow direction | upflow only |
| Heat input | 44,000 BTU/hr |
| Efficiency (AFUE) | 80.0% |
| Model number note | Docs list unit size as 045-08 etc.; nameplate adds series characters (Series 160). PD rated input differs from size code (e.g. 045 = 44,000 Btuh); btu_input here is the PD rated input. |
How to read a Carrier model number
Source
- Carrier 58PA-14SI Installation, Start-up, Operating and Service and Maintenance Instructions (installation manual, page 7): document. Read 2026-11-03.
- 58PAV Product Data (58PAV-9PD), Performance data table (product data / spec sheet, page 5): document. Read 2026-11-03.
Check that the model number on your furnace label matches, and compare with the size printed on your old filter. If they differ, go by the filter that fits your rack.