Carrier 58MVC100-20 furnace filter size
This furnace takes a 16 x 25 x 1 (3/4 in. actual) filter (side return) or a 20 x 25 x 1 (3/4 in. actual) 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 (3/4 in. actual) | 1 |
| bottom | 20 x 25 x 1 (3/4 in. actual) | 1 |
Where the filter goes
Inside furnace blower compartment. SI p22 Table 2 footnote: '† Factory–provided with the furnace' (bottom-return size; side for 17-1/2).
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 | 21 in. |
|---|---|
| Airflow direction | 4-way multipoise (upflow/downflow/horizontal), direct vent, Infinity |
| Heat input | 100,000 BTU/hr |
| Efficiency (AFUE) | 95.0% |
| Model number note | Docs list unit size as 060---14 etc.; nameplate adds series characters (Series 100). |
How to read a Carrier model number
Source
- Carrier 58MVC-5SI Installation, Start-up, Operating and Service and Maintenance Instructions (installation manual, page 22): document. Read 2026-11-03.
- 58MVC Product Data (58MVC-5PD), Physical data table (product data / spec sheet, page 9): 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.