There are two types of these devices on sale — indirect and direct heating. The highest sales on the market are used by gas heat guns with direct heating technology, since they are not at all expensive, simplicity of design, ease of maintenance and operation. But still it is worth paying attention to the fact that using such a device in a closed space is contraindicated and dangerous, since the gases secreted during combustion are very harmful to human health. So there is no divert of the harmful substance, then its best use, in rooms where there is good ventilation and constant flow of oxygen.
Then its best
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