1) Heat Output & Room Size (kW)

Stove output is rated in kilowatts (kW). Too small and you’ll run it hard (wasting fuel, sooting the glass). Too large and you’ll be forced to “slumber” it, creating smoke and deposits.

Quick kW Estimator

1. Measure your room: length × width × height (in metres) to get the volume in m³.
2. Use a base factor of 0.04 kW per m³ for a typical UK home.
   (Rule of thumb. Example: 5.5 m × 4 m × 2.4 m = 52.8 m³ → 52.8 × 0.04 ≈ 2.1 kW)
3. Adjust:
   • +10–20% for older/leaky homes, high ceilings, lots of glass, or open-plan spaces.
   • −10–20% for modern, well-insulated homes or small enclosed rooms.

Typical living rooms end up in the 4–6 kW range. Larger or open-plan areas may need 7–10 kW+. When in doubt, choose the lower output and run it optimally with seasoned fuel.

2) Home & Room Factors

• Insulation & air tightness: Modern/renovated homes need less output. Consider a direct air supply model for airtight properties.
• Room layout: Open-plan or stairwells pull heat away—plan for higher output or use a stove fan later.
• Ceiling height: Tall rooms require more kW to feel cosy at sitting level.
• Intended use: Occasional cosiness vs. primary heating affects your ideal size and efficiency priorities.

3) Regulations & Compliance (UK)

• Ecodesign-ready: Choose an Ecodesign 2022-compliant woodburner for cleaner, more efficient combustion.
• Smoke Control Areas: If you’re in a Smoke Control Area, pick a DEFRA-exempt stove to legally burn wood.
• Building Regulations (Part J): Your installation must meet UK Building Regs. Using a competent, registered installer (e.g., HETAS) is strongly recommended.

Note: We cover installation rules in detail on the “Installation & Legal Requirements” page.

4) Installation Fit & Flue Considerations

• Chimney & flue: Do you have an existing chimney? You may need a suitable liner sized to the stove’s flue outlet. No chimney? Consider a twin-wall insulated flue system.
• Top vs rear exit: Check the flue outlet position matches your hearth/recess and simplifies the run.
• Clearances & recess size: Ensure the stove’s stated clearances to combustibles and physical dimensions fit your fireplace or alcove.
• Hearth: Some stoves are rated for a 12 mm hearth; others need a constructional hearth. Verify the manufacturer’s requirement.
• External air (direct air): In modern airtight homes, stoves that connect to an external air supply help combustion and comfort.

5) Design & Features

• Woodburner vs multifuel: Wood-only models typically have a flat bed and optimised airwash. Multifuel versions add a raised grate and ashpan for approved smokeless fuels.
• Materials: Steel heats quickly and gives even output; cast iron retains heat for longer and often features decorative detailing.
• Viewing window & airwash: Look for effective airwash to keep glass clearer.
• Clean-burn/tertiary air: Improves efficiency and reduces emissions.
• Size & log length: Check maximum log length (e.g., 25–35 cm typical) and that the firebox suits how you like to load.
• Controls & usability: Simple, clearly labelled air controls; removable baffle; easy ash removal.
• Style: Traditional vs contemporary, pedestal vs log-store base, enamel vs paint—match your room aesthetic.

6) Budget, Running Costs & Warranty

• Price vs efficiency: Higher-end models often offer better combustion design, tighter seals, and durable components—saving fuel over time.
• Spare parts availability: Check for readily available baffles, firebricks, rope seals, and glass.
• Warranty & service: A solid manufacturer warranty and local support network add long-term value.

Tip: Always compare the official nominal kW, efficiency %, and compliance claims on the manufacturer data plate/manual before you buy.