HF577DU
Previously certified
EPA lists HF577DU under Horse Flame Metal USA, Inc. as a previously certified non-catalytic wood stove.
The listed emission rate is 6.8 grams per hour.
EPA does not list an HHV efficiency for this model line.
Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.
EPA rows
| Field | Row 1 |
|---|---|
| Status | Previously certified |
| Type | Wood Stove |
| Subtype | Non-Catalytic Stove |
| Emission | 6.8 grams per hour |
| HHV efficiency | Not listed |
| Heat output | 10,800–43,100 BTU/hr |
| Firebox | Not listed |
| CO | Not listed |
| Certified fuel | Not listed |
| Test method | Not listed |
| 2020 NSPS | No |
Retail names in the model line
These are the names split from EPA's model cell. They are aliases for this line, not separate listings.
- HF577DU
Other model lines from this manufacturer
- 517 HF Previously certified
- 717 HF Previously certified
- 917HF, HF917UA Previously certified
Nearest model lines by EPA figures
Nearest means the smallest absolute difference on that EPA figure, among other Wood Stove model lines that list it. Ties are ordered by model name.
Emission
- 905 — 6.8 grams per hour
- Bostonian 2500C — 6.8 grams per hour
- H530 — 6.8 grams per hour
- Heritage Classic T16 and VT16 — 6.8 grams per hour
- Buck Carolina/Tharington 51/T-51/C82 — 6.7 grams per hour
HHV efficiency
EPA does not list an HHV efficiency to compare, or no other line lists one.
Heat output
- Alpine — 11,500–42,400 BTU/hr
- EF-2100 — 11,000–42,900 BTU/hr
- Energy King Legacy 950 — 11,700–42,200 BTU/hr
- High Valley 2000, Craft Stove 2000 — 10,800–43,100 BTU/hr
- OV-21 — 11,700–42,200 BTU/hr
Horse Flame Metal USA, Inc. hub · EPA Certified Wood Heater Database