Carrier 58TN0A090C17--16 furnace filter size
This furnace takes a 16 x 25 x 1 (3/4 in. actual) filter (side or bottom return).
Every filter option for this model
| Where return air enters | Filter size (inches) | How many |
|---|---|---|
| side | 16 x 25 x 1 (3/4 in. actual) | 1 |
| bottom | 16 x 25 x 1 (3/4 in. actual) | 1 |
Where the filter goes
External. SI: 'There are no provisions for an internal filter rack in these furnaces. A field-supplied accessory external filter rack is required.'
The maker does not ship a filter with this furnace. The size above is the maker's recommended size at the furnace; if your home has a filter grille in a wall or ceiling, that grille sets the size instead.
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 | 17.5 in. |
|---|---|
| Airflow direction | 4-way multipoise (upflow/downflow/horizontal), 2-stage variable-speed |
| Heat input | 90,000 BTU/hr |
| Efficiency (AFUE) | 80% |
| Model number note | Unit sizes from PD (e.g. 070C14--12); '--' positions vary. SI covers 58TN0A/58TN1A. |
| Also sold as | 58TN1A |
How to read a Carrier model number
Source
- Carrier 58TN0A-02SI Installation, Start-up, Operating and Service and Maintenance Instructions (installation manual, page 40): document. Read 2026-11-03.
- 58TN0A Product Data (58TN0A-03PD), Accessories list (washable unframed filter by unit size) (product data / spec sheet, page 4-5): 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.