In general, you should not run an unvented fireplace for more than three hours at a time. If you are using natural gas, you can usually run your fireplace for up to four hours before needing to refuel. If you are using propane, the limit is typically two hours.
In short, you really shouldn't let a gas fireplace on for too long—specifically more than three hours at a time.
In general, running a gas fireplace too long can potentially increase the risk of both fire and fumes. The duration of time that a fireplace can be left on will depend on the type of unit.
You should never leave a fireplace burning overnight, regardless of the source. Before you go to sleep, be sure to put out the fire and let the materials cool down. Unattended fire is a hazard, and even the slightest gust of wind can reignite it or blow embers to a nearby flammable material.
A modern furnace is more efficient in turning gas into heat than a gas fireplace. This means that although a furnace costs more to run per hour than a gas fireplace, it turns more of that energy into heat and can warm a whole house rather than a single room.
Gas fireplaces are an efficient type of fireplace that are typically good at providing heat for the room in which they are located, and can be much more efficient and produce more heat compared to the existing masonry fireplace they replace.
There is a risk of carbon monoxide poisoning when you sleep in a room where a conventional coal or gas fire, a log burner, a cooker, or a back burner is left on overnight. You cannot feel the early symptoms of carbon monoxide poisoning, so it is important that you protect yourself.
We recommend that you turn off your gas fireplace pilot light seasonally. Turning off your gas fireplace's pilot light can save a substantial amount of energy and money. It is important to remember that not all gas fireplaces have “standing” pilot light, or, a pilot light that is “always on”.
Although convenient, these home gas fireplaces pose significant risk of explosions and house fires if they are improperly installed or maintained. Gas Fireplace leaks can result in carbon monoxide poisoning, but can also result in explosions that can level an entire neighborhood block.
To “break in” your new gas fireplace, it should be run on its highest setting for 6 straight hours. You may experience minor smells and smoke, so being home and deactivating your smoke detector for the first few hours as important. This is a normal part of the process.
Yes, gas fireplaces are one potential cause of carbon monoxide poisoning. While there are many potential sources of such exposure, including certain appliances and devices, motor vehicles and wood stoves, gas fireplaces are a common culprit.
The Benefits: Gas fireplaces burn at about 50 to 90 percent efficiency. Compare that to a wood fireplace, which offers roughly 10 to 30 percent efficiency.
Gas fireplaces are safe. But as with all gas appliances, they do produce carbon monoxide. If something goes wrong, carbon monoxide put the home's occupants at risk. It's not always easy to tell when theres a carbon monoxide leak.
While gas fireplaces don't produce creosote, they do still need annual cleaning. Both propane and natural gas are clean burning gas fuels, so they don't produce the same byproducts as wood, but they can still produce buildup that needs to be cleaned away.
If you get dust in the pilot assembly and the pilot needs to be cleaned out, it produces a "lazy" flame, which will be disturbed by the draught of the main burners. The flame lifts away from the thermocouple and causes the temperature on the tip of the thermocouple to drop. This, in turn, makes the gas valve shut off.
A little heat is produced when your pilot light is on so turning it off in summer can help reduce the heat inside your home. The less heat there is, the less you have to use your air conditioner needs to cool down the house. You can get savings and conserve energy if you turn off your pilot light.
But, how many hours can you leave a gas fireplace on? Generally speaking, gas fireplaces that are fully vented (aka direct vent) and have a sealed glass front can be left on for many hours. But models that are vent-free and have front doors that can be opened should only be left on for a maximum of 2 hours at a time.
A vented fireplace has attractive yellow and orange flames that lick upward around the sides of the ceramic logs. An unvented fireplace, by contrast, has much less striking flames. These flames tend to be smaller and bluer. As a result, an unvented gas fireplace won't create quite the same illusion as a vented one.
The standard fireplace is among the most inefficient heating devices you can operate. In fact, it can be so inefficient that in some cases it actually makes your house colder.
Open Flame Gas Fire – 8kw – 40p per hour.
Standard gas stoves
As gas doesn't produce any heavy smoke, as a wood burning stove would, they don't require you to have a Class 1 brick chimney – though they usually can be installed into one of these without any issues.