When looking to buy a gas fireplace you will need to consider the following factors to determine the correct gas fireplace for your needs.
VENTED OR FLUE LESS
Two types of gas fireplace are available in the market, vented [requires chimney to outside] and flue less [no chimney required to outside]. Vented gas fireplaces as a rule are much heavier on gas due to their extended flame affect. Their heating capacity however is not as high as the flue less gas fireplaces due to the fact that about 35% of the heat generated is lost through the chimney to the outside. On the other hand flue less gas fireplace is 99% efficient due to their flue less nature and that all heat generated is kept inside the house. These units burn the gas much more efficiently and the co2 emissions are virtually nonexistent, thus it does not soot like vented gas fireplaces.
Depending on the brand of flue less gas fireplace you buy the co2 levels emitted will vary. With some brands the emissions are much higher than others causing a “burnt gas” smell in your home, so be sure to ask for the co2 emission ratio on the various units before buying. You would be able to determine if a grate will have high emissions simply by comparing their heat output and gas consumption with each other, for example:
Grate 1 – 6.5kw @ 1.1kg/h on max [high emissions will give smell]
Grate 2 – 9.5kw @ 640g/h on max [low emissions virtually no smell]
HEATING CAPACITY
You need to be sure that the gas fireplace you buy would be able to heat the area you plan to use the unit in. With most houses being open plan you are required to take any adjacent room which cannot be closed off by a door into account as well. As a rule of thumb you can say that for every 10m² at normal ceiling height of 2.7m you require 1kw of heat to warm the room.
GAS CONSUMPTION
Depending on the brand of gas fireplace you buy the gas consumption will vary. This is important to take into consideration when determining what size gas supply should be installed. The municipal bylaw in Cape Town states that no property my exceed the maximum amount of 38kg of gas without gas plans being submitted. So if you are going to install an appliance which gas consumption exceeds 700g/h on maximum setting or are planning to use more than one appliance at a time you will need to submit gas plans to council. We would take you through the design and setup of the gas installation when purchasing your new fireplace.
EMISSIONS
All gas fireplaces must by law be tested by the SABS and have the LPG safety SA approval. Flue less gas fireplaces will receive a co2 emissions rating from the SABS, this will vary from brand to brand depending on how efficient the product is set up. It will also vary depending on the grate size. These co2 emission ratings should be taken into account when determining the room size you want to install the flue less gas fireplace into.