Stoves Lopi Evergreen NexGen-Hybrid
Lopi Evergreen NexGen-Hybrid
Lopi's mid-size steel hybrid: 10,768 to 31,641 BTU/hr and 77% HHV in its EPA listing, 20.5-inch logs and a 14-hour burn claim.
Key specs at a glance
Tested heat output
10,768–31,641 BTU/hr EPA
Low to high burn rate, crib wood test
Advertised maximum
70,500 BTU/hr maker
2.23× the EPA maximum
Efficiency
77% EPA HHV
Maker: 77.3% HHV
Advertised heating area
Up to 2,000 sq ft
16 BTU/hr of tested output per sq ft at the top figure
Particulate emissions
1.2 g/hr EPA
Limit 2.0 g/hr (crib wood test)
Firebox
2.18 cu ft EPA
Logs: 20.5 in maximum
Where to buy · Evergreen: Sold through dealers; price not yet verified. No retailer link yet.
Advertised vs EPA-Tested Output
BTU/hr. The advertised figure is 12,500–70,500 BTU/hr cord wood; 10,768–37,113 BTU/hr crib wood sourcechecked 2026-10-21 The EPA range is the tested low and high burn rate from the Evergreen NexGen-Hybrid Free-Standing, Evergreen NexGen-Hybrid Insert listing (10,768–31,641 BTU/hr EPAchecked 2026-10-21 ). Why the numbers differ.
Our Read
The Evergreen sits in the middle of Lopi’s NexGen-Hybrid range, which pairs secondary-burn tubes with a catalyst. It takes 20.5-inch logs and is approved for alcoves and mobile homes.
Lopi’s brochure gives two ranges: 12,500 to 70,500 BTU/hr on cord wood and 10,768 to 37,113 BTU/hr on crib wood. The EPA listing agrees on the low end but tops out at 31,641 BTU/hr. We haven’t found the reason for the mismatch, so the tables here use the EPA figure.
At 77% HHV and 1.2 g/hr it’s cleaner and more efficient than a typical non-cat, though behind the Blaze King and HearthStone on paper.
Bottom line: A capable mid-size hybrid. Size it on the 31,641 BTU/hr EPA maximum; the brochure’s crib wood figure is higher than the listing.
Maker Claims vs the EPA Listing
12,500–70,500 BTU/hr on cord wood Lopi wood stove brochure (Sept 2026)
10,768–31,641 BTU/hr in the EPA listing EPA listing
The cordwood maximum is 2.2 times the tested figure, one of the larger ratios among the twelve stoves here.
10,768–37,113 BTU/hr "crib wood" in the September 2026 brochure Lopi wood stove brochure (Sept 2026)
10,768–31,641 BTU/hr in the EPA listing EPA listing
The low end matches; the high end doesn't. We use the EPA figure until the listing or the brochure changes.
77.3% HHV Lopi wood stove brochure (Sept 2026)
77% HHV in the EPA listing EPA listing
Matches, with the basis named.
EPA Certification Record
| Field | EPA database value |
|---|---|
| Listing | Evergreen NexGen-Hybrid Free-Standing, Evergreen NexGen-Hybrid Insert |
| Appliance type | Wood stove, hybrid |
| Test fuel | Crib Wood |
| Heat output range | 10,768–31,641 BTU/hr |
| Efficiency (HHV) | 77% |
| Particulate emissions | 1.2 g/hr |
| Carbon monoxide | 0.64 g/min |
| Firebox volume | 2.18 cu ft |
| Meets 2020 standard | Yes |
From the EPA Certified Wood Heater Database export, checked 2026-10-21. Efficiency is the weighted average of the test burn rates on the higher heating value basis (HHV vs LHV). See every listing in our EPA database table.
Specifications (Maker Sources)
Heat
- Advertised heat output
- 12,500–70,500 BTU/hr cord wood; 10,768–37,113 BTU/hr crib wood Lopi wood stove brochure (Sept 2026)checked 2026-10-21
- Heating area
- Up to 2,000 sq ft Lopi wood stove brochure (Sept 2026)checked 2026-10-21
- Efficiency
- 77.3% HHV Lopi wood stove brochure (Sept 2026)checked 2026-10-21
- Burn time
- Up to 14 hours Lopi wood stove brochure (Sept 2026)checked 2026-10-21
Fuel & build
- Firebox (maker)
- 2.18 cu ft Lopi wood stove brochure (Sept 2026)checked 2026-10-21
- Log length
- 20.5 in maximum Lopi wood stove brochure (Sept 2026)checked 2026-10-21
- Weight
- 505 lb on legs, 530 lb on pedestal Lopi wood stove brochure (Sept 2026)checked 2026-10-21
What We Haven't Checked
- Current list price (dealer-priced).
- Real-world output in your house, which depends on wood moisture, chimney draft and how you run the stove. Nobody's lab number covers that.
Other stoves in the database:
- Blaze King Princess PE32
- Woodstock Ideal Steel Hybrid 210b
- Jøtul F 500 V3 Oslo
- HearthStone Green Mountain 60
- Pacific Energy Super LE
- Drolet Escape 1500
- US Stove US2000
- Harman P43 Pellet Stove
- PelPro PP130 Pellet Stove
- ComfortBilt HP22 Pellet Stove
- Castle Serenity Pellet Stove
Sizing a room? Run the heating and fuel cost calculator, or start with the best wood stoves guide.