Slow Combustion Wood Heaters vs Open Fireplaces: Which Is Better for Sydney Homes?

Homeowners deciding on a fireplace often face tough choices. For starters, will it be wood, gas or electric? And if you’ve already decided on wood, will you choose the rustic aesthetic of an open fireplace or the chic practicality of a slow combustion heater?

As Sydney’s leading fireplace retailer, Home Fires can help you make the right choice for your home. Here is the Home Fires guide to choosing between an open wood fireplace and a slow combustion wood heater in Sydney. 

Quick Glance: Comparing Open Hearth and Slow Combustion Heating

Here is how the choice between an open fireplace vs wood heater compares when you’re looking at some important factors:  

Slow combustion wood heaters:

• Heat large rooms using both radiant heating (direct heat) and convection heating (warm air circulating).
• Excellent whole-home heating.
• Easier installation and less money spent on firewood over time.
• Lower wood consumption, approximately 8-12 hours burn time.

Open wood fireplaces:

• Radiant heating.
• Most effective for the area immediately in front of the fireplace.
• Complicated installation, especially in a new build.
• Higher wood consumption, burn time of between 2-3 hours.

Slow combustion heaters are generally more suitable for Sydney’s mild winters and modern homes, as well as local environmental and council regulations. However, open wood fireplaces have an authentic ambience that some find irreplaceable. But if you haven’t yet made up your mind, this article dives further into the question of open fireplace vs. slow combustion wood heater in Sydney.

What is a Slow Combustion Wood Heater?

Also known as a closed combustion stove or sometimes simply a wood heater, a slow combustion wood heater is an airtight sealed firebox with a controlled air intake. Using sliders, you control how much air goes into the vents, limiting the oxygen so the wood burns long and slow. Slow combustion wood heaters seal their fireboxes with glass doors, allowing you to watch the fire while keeping it safely contained. In Australia, slow combustion heaters are popular in colder regions and during winter for affordability, efficiency and warmth that lasts through the night.

The Traditional Open Fireplace Explained

A traditional open fireplace has exposed flames and a chimney cavity. For most people, it’s the first type that springs to mind when they hear the word “fireplace”. And with its familiar crackle of logs, it evokes feelings of cosiness, comfort and nostalgia. An open fireplace is built into the hearth, has no glass door and draws air from the room while directing smoke up the chimney. It provides radiant heating directly to the area in front of the fireplace..

Efficiency and Heating Performance: The Ultimate Showdown

When you’re looking for a wood-burning fireplace in Sydney, here’s how an open fireplace vs wood heater both perform at the crucial task of heating your home efficiently:

Radiant vs Convection Heat Distribution

To put it simply, open wood fireplaces use radiant heating while slow combustion heaters use both radiant and convection. Radiant heat is similar to heat from the sun in that it warms up people and objects directly rather than the air around them. This type of heating is ideal for sustained warmth in large spaces and an even style of heat distribution.

Convection heaters warm the air around the fireplace before circulating that air throughout the room. Convection heating provides quicker heat circulation that’s ideal for heating multiple rooms or rooms with high ceilings. Convection heating also works harmoniously with ceiling fans, which help push heat downward.

Heat Retention and Overnight Burn Capabilities

Slow combustion wood heaters are the superior option when it comes to heat retention. They typically retain 70-85% of their heat, while open wood fireplaces lose up to 90% of their heat up the chimney. Slow combustion heaters are designed for long, sustained burns of 8-12 hours, making them perfect for warming the house overnight. Open fireplaces, on the other hand, require more wood every hour to keep the fire burning.

Sydney Environmental Regulations and Council Compliance

All Sydney homeowners seeking to install or replace a fireplace or wood heater need to submit a Planning Application via the NSW Planning Portal plus get Council approval.  They must have a certificate of compliance issued by a body approved by the Environmental Protection Authority (EPA) confirming their chosen heater meets Australian and New Zealand (AS/NZS) Standards. This is something their retailer can help them confirm when they’re fireplace shopping.

Understanding EPA Smoke Control Zones in New South Wales

In New South Wales, the Environmental Protection Agency (EPA) and City Council heavily regulate smoke from wood heaters, fire pits and backyard burns in order to reduce air pollution. Under the Protection of the Environment Operations (Clear Air) Amendment (Solid Fuel Heaters) Regulation 2016, residents need to ensure wood heaters and fireplaces aren’t emitting excessive smoke.

Particulate Emission Standards and Australian Standards Compliance

All heaters sold in NSW must have a thermal efficiency rating of 60% or higher and emit no more than 1.5 g/kg of emissions. You can check that a heater has a compliance plate confirming it conforms to the Australian Standard for pollution emissions (AS/NZS 4013:2014) and efficiency (AS/NZS 4012:2014). 

Running Costs and Timber Consumption

Open fireplaces require fresh wood more frequently than enclosed wood heaters. While a wood heater can heat up an entire home using 3-6 tonnes of timber per winter, an open fireplace needs 8-12 tonnes to produce the same amount of warmth. Open fireplaces work out to be a lot more expensive than wood heaters due to higher set-up costs, more maintenance requirements and the ongoing need for higher amounts of firewood.

Fire Safety and Indoor Air Quality

Enclosed wood fireplaces maintain better indoor air quality and protect children and pets from open flames. Open fireplaces release carbon monoxide and fine ash particles into your home. Wood-burning heaters contribute significantly to air pollution in NSW and can worsen asthma or pre-existing heart conditions. Without a fireplace screen, stray sparks can also fly out of the hearth and ignite nearby materials.

Enclosed wood fireplaces keep sparks and embers safely contained between heavy glass doors and trap smoke and soot inside so they don’t seep out into the room.  

Design Flexibility for Modern Property Upgrades 

Compared to open fireplaces, wood heaters offer more flexibility for modern Sydney homes. Available in both sleek in-built units and freestanding options, slow combustion wood heaters in Sydney are easy to cleanly and sleekly integrate into contemporary city designs.

Standalone Freestanding Unit Installation Options

Standalone freestanding wood heaters have a simple installation process and require minimal structural work as opposed to open wood fireplaces. They also have flexible and diverse installation options, whether against a flat wall, a feature wall or a corner.

Retrofitting with an Inbuilt Wood Fireplace in Sydney

Retrofitting an inbuilt wood fireplace in Sydney turns an old-fashioned open fireplace into a modern, efficient heater. Retrofitting is a convenient way to upgrade your fireplace so that it fits Sydney environmental and Council requirements.

Upgrade Your Home Heating with Home Fires 

Sydney’s leading and longest-running independent fireplace retailer, Home Fires is the place to find the perfect wood-burning fireplace in Sydney, whether it’s an old-fashioned open fireplace or a chic modern firebox. You can shop slow combustion wood heaters or browse  our inbuilt wood fireplaces to perfectly complement your home.

A trusted name for over 40 years, Home Fires supplies, installs and services high-quality fireplaces. View all wood heaters and fireplaces and contact our Minto showroom team to find out more about our range.

Frequently Asked Questions (FAQ) 

Are open timber hearths banned by councils when installing a wood-burning fireplace in Sydney?

Open wood fireplaces are heavily restricted in Sydney. All homeowners need to get Council approval before installing or replacing an open fireplace, and the hearth needs to be made of non-combustible material like brick or stone.

How much more efficient is a slow combustion heater in Australia compared to an open hearth?

A slow combustion heater in Australia is three to six times more efficient than a wood-burning fireplace.

Can I convert my old open brick fireplace into an efficient slow combustion unit?

Yes, you can convert your old brick fireplace into a slow combustion heater by adding a wood fire insert into the existing brick cavity.

What are the wood storage and fuel requirements when comparing an open fireplace vs. a wood heater?

In order to generate the same amount of heat, an open fireplace can burn up to three or four times the amount of firewood as an enclosed heater. It also requires around a third as much storage space.

Where can I view compliant heating options and speak with installation experts in Sydney?

You can browse EPA-compliant fireplaces here on the Home Fires website and contact our experts to ask us about our open and inbuilt wood fireplaces in Sydney.