Brands › American Standard › XT95 (TUH1/TDH1 -H)
American Standard AUH1B040A9H21B furnace filter size
This furnace takes a 17 x 25 x 1 filter (not stated (spec table, upflow model) return) or a 17 x 25 x 1 filter (upflow bottom return) or a 17.5 x 25 x 1 filter (upflow side return), depending on where the return air comes in.
Every filter option for this model
| Where return air enters | Filter size (inches) | How many |
|---|---|---|
| not stated (spec table, upflow model) | 17 x 25 x 1 | 1 |
| upflow bottom | 17 x 25 x 1 | 1 |
| upflow side | 17.5 x 25 x 1 | 1 |
Where the filter goes
Product data: "FILTER - Furnished? Yes", row label "Shipped (No.-Size-Thk.)". Downflow: two filters factory supplied, external in return duct.
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 | 17.5 in. |
|---|---|
| Airflow direction | upflow/horizontal |
| Heat input | 40,000 BTU/hr |
| Efficiency (AFUE) | 95.0% |
| Model number note | trailing revision letter varies Same furnace as Trane TUH1B040A9H21B, per the maker's document. |
| Also sold as | Trane TUH1B040A9H21B |
How to read a American Standard model number
Source
- Trane Product Data XT95 TUH1/TDH1 (-H) Pub. 22-1859-07 (2018) (product data (spec sheet), page 5): document. Read 2026-11-03.
- Installer's Guide 18-CD33D1-11-EN (*UH1/*DH1 -H, XT95) (2019) (installation manual, page 12): 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.