Enerzone Harmony 2.3 Wood Stove

Right buyer

Buyers who want the heating performance of a serious 2.4 ft³ medium-large stove combined with a strongly decorative look that reads more like a traditional cast-iron appliance than the cleaner-lined Solution 2.3. The Harmony's Fluted Roman Doric column detail and rounded body panels are the visual feature — this is a stove chosen as much for how it looks in the room as for what it puts out.

Owners of medium-to-larger homes, well-insulated open-plan two-story spaces, or one stove serving as primary winter heat across 1,200–1,800 sq ft of conditioned space, with reasonable insulation and access to seasoned hardwood at 15–20% moisture content. Mobile-home and manufactured-home owners — this stove is certified for mobile-home installation with the required fresh-air intake kit and insulated intake pipe.

Buyers who want east-west loading and the wider 17 1/2-inch door opening that comes with it. The Harmony is built around a wider-than-it-is-deep firebox with a generous 17 1/4" depth; logs go in across the width, sides visible from the door. The deep firebox makes overnight packed loads straightforward and accepts north-south loading as a secondary option.

Alcove buyers who want a serious heater. The Harmony is alcove approved with double-wall pipe — useful for buyers fitting a stove into a defined alcove space where the decorative finish reads well.

Wrong buyer

Not for buyers who want a narrow-footprint stove. The Harmony's design uses a substantial side cabinet — the side-wall clearance requirement is 22 inches in both single-wall and double-wall pipe configurations, meaningfully more than most stoves in the class. Verify the install location can accommodate 22-inch side clearances before purchase.

Not for buyers heating under 1,000 sq ft. The Harmony is meaningfully larger than the Solution 1.4 or 1.7; in a small room it will overheat at almost any meaningful burn rate. If you're heating a small space, look at the smaller siblings instead.

Not for buyers expecting 10+ hour overnight burns. The 8-hour manufacturer maximum is achievable on a packed load of dense hardwood with the air shut down hard, but useful heat from a packed load is realistically 6–7 hours. For longer burns, step up to a 3.0+ ft³ firebox or to a catalytic stove with a real low-output mode.

Not for buyers who want clean modern styling. The Harmony's decorative styling is the whole point — Fluted Roman Doric columns, rounded body panels, traditional silhouette. If you want clean lines and minimal detail, the Solution 2.3 in the same performance class is the better pick.

The Harmony 2.3 is approved for installation in residential homes, cabins, sunrooms, alcoves (with double-wall pipe connector), and mobile or manufactured homes (with the required fresh-air intake kit and insulated intake pipe). It is not approved for installation in factory-built (prefab) metal fireplaces or in any outdoor or unconditioned space.

Clearances to combustibles — USA

Clearances to combustibles — Canada

The 22-inch side-wall clearance applies in both single-wall and double-wall pipe configurations — switching to double-wall does not reduce side-wall distance on this stove. Verify the install location can accommodate 22-inch side clearances before purchase. The certification label on the back of the stove always overrides clearance figures published in any other media. Confirm the binding clearance figures with your installer before purchase.

Floor protection

The hearth extension must be a continuous, non-combustible surface in front of the door opening. Approved materials include steel of at least 0.015" thickness, ceramic tiles sealed together with grout (over a continuous non-combustible sheet beneath), cement board, brick, or any other approved or listed material suited for floor protection. Tile alone is not sufficient — a continuous non-combustible sheet beneath the tile is required. Any R-value requirements are specified in the manual and should be calculated for the specific installation configuration. No floor protection is required if the stove is installed on a non-combustible floor (concrete slab, for example).

Chimney and venting

The Harmony 2.3 requires a 6-inch chimney flue system. New factory-built chimney systems must comply with UL 103 HT (USA) or ULC S629 (Canada) and be suitable for solid fuel. The stove may also be connected to a code-compliant masonry chimney, provided the chimney has either a clay liner or a suitably listed stainless-steel liner at 6-inch diameter and the application is verified by a qualified installer.

The minimum chimney height is 12 feet, subject to installer verification, certification label, draft conditions, and local code. The chimney must extend at least 3 feet above the highest point of contact with the roof and at least 2 feet above any roof line or obstacle within 10 feet horizontally.

For mobile-home installations, single-wall pipe is strictly forbidden — only double-wall pipe is permitted, and a fresh-air intake kit with insulated intake pipe is required. The fresh-air intake pipe (HVAC type) must meet ULC S110 or UL 181 class 0 or class 1.

Outside air

An optional fresh-air intake kit is available for code jurisdictions requiring outside combustion air, for tight new-construction homes with mechanical ventilation, and is required for mobile-home installations. A smoke detector and carbon monoxide detector are required in the room where the stove is installed.

Code compliance

Code compliance for any specific installation is determined by the local Authority Having Jurisdiction. Manufacturer listings cover what the stove is approved for; the AHJ approves what is permitted at your address. A WETT (Canada), NFI, or CSIA (USA) certified installer is strongly recommended and frequently required by code, permit, or insurance. Confirm local requirements before purchasing — particularly in EPA non-attainment counties and in HOA jurisdictions where new wood-burning installs may be restricted.

California Proposition 65

This product can expose you to chemicals including carbon monoxide, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov.

Ships with the stove

• Harmony 2.3 wood stove with welded carbon-steel firebox, arched cast-iron glazed door, and integrated steel legs
• Configured at order with required door overlay selection — Black Steel Door Overlay or Brushed Nickel Steel Door Overlay
• Fluted Roman Doric column body panel detailing (industrial design protected)
• C-Cast baffle and stainless-steel secondary-air tube assembly
• Refractory firebrick lining
• Easy-to-access ash drawer
• Owner's manual and product documentation

Sold separately

• Code-compliant 6-inch chimney system — listed factory-built chimney for new installations, or an approved masonry chimney/liner configuration where permitted by code and verified by the installer/AHJ; required venting components are sold separately
• Single-wall or double-wall pipe connector between the stove and chimney — double-wall is required for alcove and mobile-home installations and reduces back-wall clearance requirements (side-wall clearance is the same in both)
• Hearth pad or floor protection sized to manual specifications, with continuous non-combustible sheet beneath any tile
• Optional 130 CFM blower with variable speed control (SBI AC01000) — includes thermodisc heat sensor for automatic on/off; adds forced-air circulation to improve heat distribution; without it, heat moves by radiation and natural convection only
• Optional 5-inch fresh-air intake kit for wood stove on legs (SBI AC01211) — required for mobile-home installations and for code or mechanical-ventilation requirements
• Optional 5-inch × 4' insulated flex pipe for fresh-air intake (SBI AC02090) — required for mobile-home installations
• Optional 5-inch fresh-air intake register with airtight damper (SBI AC01349) — closable outside-air damper for installations where local code, airtight-home design, or owner preference calls for one; do not close while the stove is in use
• Optional moulded refractory panels upgrade (SBI AC01236) — decorative refractory panel kit that replaces the standard firebrick lining with a smoother moulded interior; aesthetic upgrade visible through the glass
• Optional black steel hearth pad 46 3/4" × 54" (SBI AC02788) — pre-sized to the Harmony 2.3 footprint
• Optional black steel hearth pad 60" corner (SBI AC02790) — for corner installations
• Optional modular floor protection system 54" × 46 3/4" (SBI AC02711)
• Optional tempered glass hearth pad 10 mm, 54" × 46 3/4" (SBI AC02703) or tinted version (SBI AC02758) — for a polished finished hearth surface
• Pin-type wood moisture meter — strongly recommended; wet wood is the most common cause of poor heat, black glass, and creosote
• Stove-top or flue thermometer — strongly recommended for managing burn rate, draft, and overfire risk
• Installation by an authorized qualified technician (WETT, NFI, or CSIA certified) — required for warranty coverage and often required by code, permit, or insurance

The 75,000 BTU/hr maximum is a peak rating, transient, achieved on dry cordwood at high loading density and short reload intervals. The figure that matters for daily life is the sustained output across a full burn cycle, which lands in the 14,200–44,500 BTU/hr band per the CSA B415.1-10 stack-loss method — a usable range that covers shoulder-season heating on the low end and serious cold-snap output on the high end.

A realistic burn cycle from a packed load of well-seasoned hardwood produces a fast 30–45 minute warm-up, 2–3 hours of strong sustained heat, then a gradual decline over the next 3–4 hours with a coal bed remaining. Total useful heat from one full pack is realistically 6–7 hours, occasionally approaching the 8-hour manufacturer maximum with dense hardwood, mild weather, and a packed coal bed. Reload onto coals when heat output falls off and the cycle restarts.

The 17 1/4" interior firebox depth is the deepest in the 2.4 ft³ Enerzone family — meaningfully deeper than the Solution 2.3 (16 1/2") at the same overall firebox volume, which makes packed E-W loads slightly more forgiving and gives more flexibility for north-south loading of overnight packs. The 17 1/2" door opening accommodates 20-inch logs loaded east-west.

The 130 CFM optional blower is identical to the unit offered on the Solution 2.3 platform. With the blower installed, the variable-speed control lets you dial CFM up or down, and the thermodisc senses stove temperature and runs the blower automatically when the stove is hot. Without the blower, heat distribution relies on radiant heat and natural convection. For a stove sized for primary heat across larger spaces, the blower is a near-essential add — plan for the line item.

Air-wash glass stays largely clear during proper hot burns at moderate-to-high air settings. At low burn rates with marginally seasoned wood, the glass will tar. This is universal to non-catalytic stoves, not specific to Enerzone.

Same SBI medium-large performance class as the Solution 2.3 and Osburn 2000. Same 2.4 ft³ overall volume, 1.95 ft³ EPA loading volume, 75,000 BTU/hr max output, 14,200–44,500 BTU/hr tested band, 72% HHV efficiency, 2.3 g/hr emissions, 8-hour max burn, and 20-inch log capacity. What you're choosing between is the cabinet design, firebox depth, and finish — Solution 2.3 for clean modern lines with seven base configurations and a 16 1/2" firebox depth, Osburn 2000 for the Osburn brand with door overlay choices, Harmony 2.3 for the heavy decorative Fluted Roman Doric column styling with the deepest firebox depth in the family at 17 1/4".

22-inch side-wall clearance is the design constraint. The Harmony's decorative side panels project further from the firebox than the Solution 2.3, and the manufacturer's side-wall clearance is 22 inches — in both single-wall and double-wall pipe configurations. Switching to double-wall does NOT reduce side-wall distance on this stove (unlike most stoves where double-wall buys back wall clearance). This is a meaningful real-world constraint; verify install dimensions before purchase.

Medium-large firebox, medium-long burn time. A 2.4 ft³ non-cat stove gives you meaningful primary-heat capability across 1,200–1,800 sq ft, with realistic 6–7 hour burn cycles. If you want true 10+ hour overnight burns or 2,500+ sq ft primary heating, step up to a 3.0+ ft³ firebox or to a catalytic stove with a real low-output mode.

The 2,100 sq ft figure is aspirational. The most consistent owner regret across medium-large stoves is buying for the high end of the manufacturer's heating range. If you need to reliably heat more than ~1,800 sq ft as primary winter heat in a cold climate or older home, step up a firebox size.

Door overlay is a one-time decision. Two finish options — Black or Brushed Nickel — configured at order, not field-swappable. Choose the finish that matches the room before ordering.

Blower is not included. The Harmony ships without a blower; one must be ordered separately if you want forced-air heat distribution. For a stove sized to do real primary heat across larger spaces, plan for the 130 CFM line item.

435 lb shipping weight. Heaviest stove in the 2.4 ft³ Enerzone family — meaningfully heavier than the Solution 2.3 (402 lb) due to the decorative cabinet construction. Plan for three-person handling at delivery and installation; the curb-to-room move is not a one-person job.

Decorative styling is the whole point. The Fluted Roman Doric columns and rounded body panels are deliberate decorative choices. Buyers who want a stove that disappears into the room or who prefer clean modern lines should look at the Solution 2.3 in the same performance class.

Wood quality is not negotiable. The most common "the stove doesn't heat" complaint comes from owners running marginally seasoned wood. Secondary combustion works best with dry, properly seasoned fuel, ideally around 15–20% moisture. A pin-type moisture meter is the single best accessory for this stove.

Glass blackens at low burn rates. Universal to non-cat stoves. Daily hot cleanup burns and tolerance for a periodic wipe are part of operating this stove. Owners chasing always-clear glass on long, slow burns should look at catalytic technology.

First burns. The first few fires cure the high-temperature paint and condition the internal components. Burn two or three small fires first, then build bigger, hotter fires until the paint smell is gone. The smell can be strong; ventilate the room well and avoid prolonged exposure during cure-in.

Lighting. The manual describes three effective methods: conventional (newspaper at the bottom, kindling on top, then small splits), top-down (small splits at the base, smaller splits crossed over, kindling on top, paper at the very top, light the top), or two parallel logs (paper between two split logs, kindling across, log-cabin style). Cleaner ignition with the top-down method, less smoke, faster to operating temperature. Open the air control fully at light-off; leave the door slightly ajar for a few minutes during light-off; close once the fire is well established.

Air control. Single-lever, located underneath the ash shelf. Push the handle completely to the left for HIGH (open); push completely to the right for LOW (closed). Full open at light-off; gradually closed only after the load is fully engaged and stable secondary flames are established. The manual specifies closing the primary air control gradually from the time the door closes to fully closed — too fast and the fire smolders.

Reload cadence. 3–4 hours between reloads in active heating use; up to 7 hours for a final overnight pack with the air shut hard. Open the air, wait briefly, open the door slowly to avoid smoke rollout, rake coals forward, load onto the coal bed, close the door, and run the air open until the new load is fully engaged before reducing the air gradually. Place at least three (preferably more) pieces on the fire at a time so that the heat radiated from one piece helps ignite the pieces next to it. Do not elevate the fire by using a grate.

Ash management. The Harmony 2.3 ships with an easy-to-access ash drawer — the ash plug in the firebox floor opens to drop ash into the drawer below. Per the manual, empty every 2–3 days during full-time heating. The best time to remove ash is in the morning, after an overnight fire when the stove is relatively cold but there is still a little chimney draft to draw the ash dust into the stove. Always dispose of ash in a tightly covered metal container on a non-combustible surface, well away from combustible materials — ash retains hot embers for days.

Glass cleaning. Damp newspaper dipped in cold ash, or a dedicated ceramic-glass cleaner. Daily wipe during low-burn weather; weekly during high-burn. Black streaks at the lower edge mean wet wood; black uniformly across the glass means burns are running too cool. Do not clean the glass when the stove is hot, and do not strike or slam the glass door shut.

Door and glass gaskets. Per the manual, the door gasket needs replacement when the paper-strip test fails: close the door on a strip of paper and try to pull it out; firm resistance means the gasket is sealing, easy pull means it's time to replace. Test all the way around the door, not just at the latch. Plan on every 3–5 seasons in regular use.

Annual chimney sweep. Per the manual, the chimney should be cleaned and inspected at least once each year. Inspect every two months during the heating season until you know your creosote-formation rate; monthly is safer for new burners. If buildup reaches 1/8 inch, sweep immediately. The baffle and secondary tubes lift out for sweep access.

Wood seasoning. Hardwood needs 12–24 months split, stacked off the ground, top-covered, with sun and wind on the sides. Don't trust supplier "seasoned" claims — use a pin-type moisture meter, split a piece in half, measure the fresh face. Manual target: 15–20% moisture. Wood above 25% will smolder, soot the glass, line the chimney with creosote, and undercut every published efficiency and emissions number on this page.

Blower maintenance (if installed). Keep the blower intake and fins free of dust and follow the blower kit instructions for service. Do not oil the blower unless the blower manual specifically calls for lubrication. Replacement blowers and related service parts are available through Enerzone/SBI dealers and parts channels if needed years out.

What never to burn. Per the manual and EPA fuel rules: no coal, garbage, yard waste, materials containing rubber or plastic, waste petroleum products, paint or paint thinners, asphalt products, painted or pressure-treated wood, railroad ties, manure or animal remains, plywood, particle board, paper products, asbestos materials, construction or demolition debris, salt-water driftwood, or unseasoned wood. This does not prohibit normal fire starters made from paper, cardboard, sawdust, wax, or similar substances when used only to start a fire. Burning prohibited materials destroys the firebox, voids the warranty, and releases toxic compounds into your home and the chimney.

The Enerzone limited lifetime warranty applies to the original retail purchaser only and is non-transferable. The warranty applies to normal residential use only. Proof of purchase (dated bill of sale), model name, and serial number are required for any warranty claim. Online registration is recommended at enerzone-intl.com but not required if a dated invoice is retained.

Coverage by component

A one-time replacement limit applies to all parts with lifetime coverage. Warranty is void if the unit is used to burn anything other than seasoned cordwood, or if it is not operated according to the owner's manual. Damage caused by misuse, improper installation, lack of maintenance, overfiring, downdrafts, venting problems, or under-estimated heating area is not covered. Improper installation by anyone other than an authorized qualified technician voids the warranty.

Warranty claims are made through your Enerzone dealer and remain subject to SBI/Enerzone inspection, approval, and the current written warranty. Kaminos is the retailer for this stove and supports buyers through purchase; final warranty approval rests with SBI as the manufacturer. SBI's parts network is well-stocked — replacement bricks, baffle, secondary tubes, glass, gaskets, and optional blower are openly available at fair prices through multiple parts vendors.

Enerzone may require photos or returned parts to support a claim; repair work covered by warranty requires prior manufacturer approval.

Coverage details can change by component and warranty revision; the current Enerzone warranty controls.