Open Gas Fireplaces
Frequently asked questions
Heatmaster open Gas burning fireplace
The firebox
How much will the Heatmaster gas open fire heat?
Open gas fires are designed as a decorative feature to add ambience. Open gas fires should
not be purchased as a heating source.
Heating capacity
Heatmaster 450 2-3 Squares
Heatmaster 650 2-3 Squares
Heatmaster 750 2-3 Squares
Heatmaster 900 2-3 Squares
Q2) What are the different types of open gas fires available from Heatmaster range?
Heatmaster offer a gas coal, a combination gas coal/log, and gas pebble fire available in
Heatmaster sizes 650, 750 and 900. Gas coal and gas coal/log are also available in the
Heatmaster 450.
Q3) What is the MJ input for Heatmaster gas open fires?
450 Coal log
650 Coal log
750 Coal log
900 Coal log
23 MJ/Hr
31 MJ/Hr
31 MJ/Hr
36 MJ/Hr
28 MJ/Hr
37 MJ/Hr
37 MJ/Hr
39 MJ/Hr
Where are they made?
Heatmaster open gas fireboxes are proudly Australian made
What are the Heatmaster open gas fireboxes made from?
The Heatmaster open gas firebox are made with BHP Pressed steel, Ranging from 2mm thick
for the outer casing to 3mm for the internal back and sides.
Do they have a Warranty?
The Warranty ranges from 12 months for gas components to 15 years on firebox (under
normal/Intended use)
Why can Heatmaster gas fires be built into timber and plaster?
The Heatmaster “A” series fireboxes are unlike any other firebox, they have all been
designed with a layer of insulation allowing installation into timber and plaster with minimal
What makes Heatmaster different from other heat circulating boxes?
Heatmaster offer the only firebox to be fully insulated
Heatmaster open fireboxes are 100% Australian made
Heatmaster open gas fires have a large heat exchanger
Heatmaster offer a range of sizes and style open gas fires
Frequently asked questions
Heatmaster open Gas burning fireplace
Q1) What are the clearances from the fully insulated Heatmaster open gas fireboxes to
timber and plaster?
The clearances are 25mm above the unit and 25mm from back and sides.
Q2) Do I require power for my open gas fire?
The standard Heatmaster open gas fire does not require power, however if you choose the
optional fan, or electronic ignition, you will require power.
Q3) What are the clearances from double skin flue to timber and plaster?
The clearances are 25mm from any combustible material to the outer flue.
Q4) How far above the roof line must the flue protrude?
The flue must protrude no less then 600mm with nothing obstructing within 3600mm.
Q5) Do you require a hearth?
No, how ever Heatmaster recommend that 10mm /cement sheeting underneath the unit
Q6) What is the best cowl for me to use?
All Heatmaster open gas fireplaces must be fitted with an approved gas cowl.
A rotating bird cowl can not be used.
Do Heatmaster open gas fireplaces require permanent ventilation in the room?
Yes, all gas open fireplaces require permanent ventilation (as per standards AS561 – AG6012000). A cross sectional area of 40,000sq mm of effective ventilation is required.
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