Klear Sky 400
Previously certified
EPA lists Klear Sky 400 under Earth Manufacturing, LLC as a previously certified hydronic heater.
The listed emission rate is 0.3 pounds per million BTU.
The listed HHV efficiency is 47 percent.
Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.
EPA rows
| Field | Row 1 |
|---|---|
| Status | Previously certified |
| Type | Hydronic Heater |
| Subtype | Non-Catalytic Stove |
| Emission | 0.3 pounds per million BTU |
| HHV efficiency | 47 percent |
| Heat output | 70,770 BTU/hr maximum |
| Heat output maximum | 70,770 BTU/hr |
| Firebox | Not listed |
| CO | Not listed |
| Certified fuel | Cord Wood |
| Test method | Not listed |
| 2020 NSPS | No |
| Thermal storage | 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.
- Klear Sky 400
Other model lines from this manufacturer
No other model line in this snapshot uses this manufacturer string.
Nearest model lines by EPA figures
Nearest means the smallest absolute difference on that EPA figure, among other Hydronic Heater model lines that list it. Ties are ordered by model name.
Emission
- KB-125 — 0.3 pounds per million BTU
- Optimizer 350 — 0.3 pounds per million BTU
- X Series 200X — 0.3 pounds per million BTU
- 350X — 0.31 pounds per million BTU
- Classic Edge 550 — 0.31 pounds per million BTU
HHV efficiency
- Wood Gun E155 — 53 percent
- AHB-170P — 54 percent
- Crown Royal RS7300E — 54 percent
- Mahoning Skye Series V — 54 percent
- Phase 2-200 — 39 percent
Heat output
- Crown Royal Stoves 7200E — 18,091–123,247 BTU/hr
- FHG 20/30 — 70,000 BTU/hr maximum
- BioWIN 212 — 71,700 BTU/hr maximum
- PE1 Pellet 35 — 17,255–121,300 BTU/hr
- SE110 — 16,286–121,291 BTU/hr
Earth Manufacturing, LLC hub · EPA Certified Wood Heater Database