3.5 Series (Solution 3.5, Osburn 3500, Gateway 3500, Escape 2100, HT-3000, Solution 3.5-I, FW3500, Osburn 3500-I, HES350, Hei350, Blue Ridge 500, Escape 2100-I, CW3500, Blue Ridge 500-I)

Currently certified

EPA lists 3.5 Series (Solution 3.5, Osburn 3500, Gateway 3500, Escape 2100, HT-3000, Solution 3.5-I, FW3500, Osburn 3500-I, HES350, Hei350, Blue Ridg… under Stove Builder International, Inc. as a currently certified non-catalytic wood stove.

The listed emission rate is 1.6 grams per hour.

The listed HHV efficiency is 71 percent.

Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.

EPA rows

EPA result rows for this model line
Field Row 1
Status Currently certified
Type Wood Stove
Subtype Non-Catalytic Stove
Emission 1.6 grams per hour
HHV efficiency 71 percent
Heat output 17,200–57,800 BTU/hr
Firebox 2.88 cu ft
CO 1.2 g/min
Certified fuel Cord Wood
Test method Not listed
2020 NSPS Yes

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.

Other model lines from this manufacturer

All model lines on the Stove Builder International, Inc. hub. This page lists 40 of the other 89 lines.

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

HHV efficiency

Heat output

Stove Builder International, Inc. hub · EPA Certified Wood Heater Database