Hearthstone Quality Home Heating Products Clydesdale 8492 vs Kuma Stove And Iron Works K-181 Series: Aspen LE-1
The Kuma Stove And Iron Works K-181 Series: Aspen LE-1 is the cleaner burner: 1.1 g/hr certified particulate emissions versus 1.16 g/hr. The Hearthstone Quality Home Heating Products Clydesdale 8492 is the more efficient unit: 79% versus 78% HHV — more heat from every cord. The Hearthstone Quality Home Heating Products Clydesdale 8492 produces more peak heat (32,588 vs 29,153 BTU/h), suiting roughly 950–1,300 sq ft. The Hearthstone Quality Home Heating Products Clydesdale 8492 has the larger firebox (2.35 vs 1.821 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Hearthstone Quality Home Heating Products Clydesdale 8492 is a hybrid and the Kuma Stove And Iron Works K-181 Series: Aspen LE-1 a catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| Hearthstone Quality Home Heating Products Clydesdale 8492 | Kuma Stove And Iron Works K-181 Series: Aspen LE-1 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.16 g/hr | 1.1 g/hr |
| Efficiency (HHV) | 79 % | 78 % |
| Heat output (low) | 14829 BTU/h | 12764 BTU/h |
| Heat output (high) | 32588 BTU/h | 29153 BTU/h |
| Firebox volume | 2.35 cu ft | 1.821 cu ft |
| Carbon monoxide | 1.1 g/min | 0.45 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 305-22 | 346-23 |
| Covered model numbers | Clydesdale 8492 | K-181 Series: Aspen LE-1, Tamarack LE-1, Aberdeen LE-1, and Alpine LE-1 |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Clydesdale 8492 or the Kuma Stove And Iron Works K-181 Series: Aspen LE-1?
The Kuma Stove And Iron Works K-181 Series: Aspen LE-1: 1.1 g/hr certified particulate emissions versus 1.16 g/hr for the Hearthstone Quality Home Heating Products Clydesdale 8492.
Are the Hearthstone Quality Home Heating Products Clydesdale 8492 and Kuma Stove And Iron Works K-181 Series: Aspen LE-1 both EPA certified?
Yes — both appear on the U.S. EPA's current list of certified wood heaters, and every figure on this page comes from their certification records.