Metters Kosi No25

Metters Kosi No25 is a freestanding wood heater that blends Australian heritage styling with modern combustion efficiency and practical features for small to medium homes.

Kosi No25 — Overview

The Kosi No25 delivers dependable warmth for living areas up to 250m². It pairs a traditional cast-iron look with internal firebrick and baffle plate technology to extend burn times and improve heat transfer.

Kosi No25 — Key features

• Average heat output of 6.4kW for steady home heating.
• Generous firebox capacity with easy-loading dimensions and 54L volume.
• No‑mess inbuilt ash box for straightforward ash removal.
• Designed with a 6mm steel firebox and firebrick/baffle system for improved efficiency.
• Low emissions and solid efficiency for a traditional wood heater: 0.8g/kg emissions and 67% efficiency.
• 15 year firebox warranty for long-term peace of mind.

Kosi No25 — Specifications at a glance

• Dimensions (W×D×H): 630 × 500 × 810 mm.
• Weight: 132 kg.
• Heating area: up to 250 m².
• Firebox dimensions: 490 × 300 × 323 mm.
• Firebox thickness: 6 mm steel.
• Firebox capacity: 54 L.
• Average output: 6.4 kW.
• Emissions: 0.8 g/kg; Efficiency: 67%.
• Log size: fits up to 470 mm.
• Model number: SG010100004.
• Warranty: 15 year firebox warranty.

Dimensions & portability

At 132 kg the unit is a substantial freestanding heater intended for fixed installation rather than frequent relocation. The compact footprint (630 × 500 mm) suits smaller living rooms or enclosed open-plan spaces.

Fuel & setup

This heater is designed for seasoned hardwood; logs up to 470 mm are recommended for best performance. Installation requires appropriate flue and clearances—refer to the Kosi Range owners manual and local regulations for safe siting and flue specification.

What's included

• Kosi No25 freestanding heater unit.
• Inbuilt ash box.
• Manufacturer firebox warranty documentation.

Who it's for

The Kosi No25 suits homeowners seeking a traditional-looking wood heater with modern combustion performance for small to medium sized homes or open-plan living areas up to 250 m².

Care & maintenance

• Empty the ash box regularly to maintain airflow and efficiency.
• Inspect and replace firebricks and baffle plates as needed; follow the 15-year firebox warranty guidelines.
• Have the flue and chimney checked and swept annually by a qualified technician.
• Use dry, well-seasoned hardwood to reduce creosote and lower emissions.

Choosing the right option

If you're comparing options in this range, focus on how it will fit your space, how often you’ll use it, and what matters most day-to-day. For many households, the best choice is the one that’s easy to live with — straightforward to use, simple to keep looking good, and suited to Australian conditions. When you’re weighing up your shortlist, consider your layout, traffic flow, and whether you want something that’s more entertaining-focused or more everyday practical. If you’d like a second opinion, our team can help you narrow it down based on your space, style and how you plan to use it. A quick way to decide is to ask: does “this product” describe what you’re actually trying to achieve in your outdoor area? Once you’re clear on the goal, this product becomes much easier to compare across different options and configurations. Check our entire heating range at Alfresco Outdoors and Heating

Delivery Area

Delivery is currently available to selected postcodes only.

Please check that your delivery address is within our eligible postcode delivery area before placing your order.

If your postcode is not listed, please get in touch with our team before ordering and we’ll be happy to discuss whether delivery may be available to your area.

Please note: Delivery availability is subject to the postcodes listed on our Shipping page.