When buying a propane garage heater, one of the major considerations is the form of venting it comes with. Venting determines where pipes are located (for example, roof venting pipes are more complicated to install), and how many pipes to have. Here are the three major forms of venting available:
Just like the name suggests, gravity venting uses the force of gravity to get rid of the combusted gases from the heater. It operates on the principle that warm gases rise and cold ones sink, which means it doesn't have a fan to drive the air out. This makes it relatively cheap compared to other heaters. Some of the notable things about this form of venting include:
- It uses air inside the garage – this means it can only operate when the air inside the garage is clean enough to be combusted without fouling the engine or causing a safety issue. For example, if you do woodwork in your garage, then the air is likely to be filled with wood dust, and is not suitable for combustion.
- It cannot operate on negative pressure – negative pressure means that the air inside the garage is at a lower pressure than the air outside it. It happens when air inside the garage is used at a faster rate than it is being replenished.
- The venting pipe must go up – the stale air is not driven out, but rather rises naturally. This means the venting pipe must come out of the highest point in the garage, which is the roof.
Power vented units are set up more or less the same like gravity vented heaters. It still uses the air within the garage to burn the propane. The only significant difference is that a booster fan is included to help drive the combusted gases out. The significance of this fan is that the venting pipe doesn't have to go through the route; it can go through the sides of the garage since the stale air will be pushed out.
The third form of propane heater venting includes two venting pipes; one to draw in air and one to get out the byproducts of combustion. Therefore, double vented heaters do not utilize the air within the garage, which means they can operate even with negative air pressure or in polluted air environments. It also includes a fan for driving the exhaust gases out.
These are the main forms of venting available in the market today. You know your garage best; whether it has clean air or whether gravity exhausting can work in it. Analyze it before getting a propane heater suitable for your use.
For more information, contact Self Heating Cooling or a similar company.