Thelin Company Thelin Parlour T-4000
Thelin Company Thelin Parlour T-4000 is a non-catalytic wood stove from Thelin Company certified at 1.8 g/hr particulate emissions with 71% HHV efficiency and a 13,312–30,945 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Thelin Parlour T-4000 |
| Emission rate | 1.8 g/hr |
|---|---|
| Carbon monoxide | 1.54 g/min |
| Efficiency (HHV) | 71 % |
|---|
| Heat output (low) | 13312 BTU/h |
|---|---|
| Heat output (high) | 30945 BTU/h |
| Firebox volume | 1.32 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 118-18 |
What space does the Thelin Company Thelin Parlour T-4000 suit?
- Its 30,945 BTU/h peak output covers roughly 900–1,250 sq ft at the 25–35 BTU/h-per-square-foot rule of thumb — see the sizing calculator to adjust for your insulation and climate.
- The 1.32 cu ft firebox puts it in the small/cabin class.
- Rough fuel use: about 1.7 cords per season at the midpoint of its output range (8 burn-hours/day, 150-day season, 22 MMBtu/cord — see methodology).
- Certified burning Crib Wood .
Similar wood stoves
- Blaze King Industries 20.2 Series: Ashford 20.2 (AF20.2) (1.05 g/hr)
- Blaze King Industries Ashford AF20.2 (2) (1.05 g/hr)
- Rais A/S Q-Tee II Steel (0.9 g/hr)
- FPI/Regency Fireplace Products F3500B-1 (1.1 g/hr)
- Kuma Stove And Iron Works K-251 Series: Ashwood LE-1 (1.1 g/hr)
- Blaze King Industries Princess PE32 (0.4 g/hr)
Frequently asked questions
Is the Thelin Company Thelin Parlour T-4000 EPA certified?
Yes, the Thelin Company Thelin Parlour T-4000 is on the EPA's current list of certified wood heaters (certification number 118-18) and meets the 2020 NSPS Step 2 emission limits.
What is the Thelin Company Thelin Parlour T-4000's emission rate?
The Thelin Company Thelin Parlour T-4000 is certified at 1.8 grams of particulates per hour (tested with crib wood). Real-world emissions depend heavily on fuel moisture and operation — the lab figure assumes seasoned fuel and correct air settings.
How many square feet can the Thelin Company Thelin Parlour T-4000 heat?
Roughly 900–1,250 sq ft, estimated from its 30,945 BTU/h peak output at 25–35 BTU/h per square foot. Insulation, climate, ceiling height, and floor plan move this figure substantially in both directions.
Does the Thelin Company Thelin Parlour T-4000 qualify for a federal tax credit?
No — the federal 25C credit for biomass stoves was terminated for property placed in service after December 31, 2025. The Thelin Company Thelin Parlour T-4000's certified efficiency is 71% HHV, which did not meet the credit's ≥75% HHV threshold while it existed. State and local incentive programs may still apply — check your state energy office and air district.
Sources
- cfpub.epa.gov (retrieved 2026-07-23)