What is a chimney for a forced-draft gas boiler?

Centralized gas supply systems allow residents of the private sector and cottage settlements to solve the problems of heating and hot water supply (if the choice falls on double-circuit boilers) due to efficient gas boilers. If the choice of equipment has already been made, the issue of the chimney for the gas boiler remains no less relevant.

To date, there are chimneys with forced and natural draft. From the title it is already clear that in the first case, the draft of air and the withdrawal of combustion products is forced. In the second - due to natural draft. Let's take a closer look at the flue device for a gas boiler with forced draft.

Outwardly, such a chimney for a gas boiler is practically the same as usual. But in reality, its design is made in the form of a "pipe in a pipe," one of which air enters the combustion chamber, and the other smoke together with other combustion products is discharged outside. At the expense of which the optimal uninterrupted combustion of gas is achieved, and also the possibility of smoke poisoning and the occurrence of such a dangerous reverse thrust is excluded.

For the air run, the fans that are mounted inside are responsible. One of them creates a draft of air from the outside inward, and the other is responsible for the forced removal of combustion residues.

pros

1. Ease of installation. The device of chimneys for gas boilers with forced draft is much simpler than their counterparts with natural draft.

2. Ability to connect to automation systems. The dependence on electricity, which is more relevant to the minuses of similar systems, is also a plus. This is due to one important indicator - adaptability to automation systems. The signal from the thermostat, which is an integral part of the automated systems, opens the valve and starts the fans, which perform the functions of creating traction and output of combustion products. Non-volatile chimneys can not be connected and adjusted for automatic operation.

3. No need for ventilation or extraction. The chimney for a gas boiler with active draft completely copes with the withdrawal of combustion products due to the fan used. Due to this factor in the premises where the boiler equipment is installed, there is no need to install a ventilation or exhaust system.

Minuses

The main disadvantage of such chimneys is dependence on the power source! If there is no electricity, then the system will not function. This indicator is very important, and it should be guided by the selection of equipment. If there is no long-term power outage, then the chimney for a gas boiler with active draft is the most optimal option. But to avoid possible force majeure situations it is recommended to connect volatile heating systems, including chimneys with forced draft, to backup power sources.