Gas heaters with open flame (Blue Flame)

With open flame (Blue Flame)

— gas heaters where the burner produces a visible "blue" flame are designed to primarily heat the air, allowing warmth to be felt quickly. They are often chosen for their straightforward and easy operation and the effect of "it quickly became warmer," especially in summer cottages, garages, and spaces where a rapid increase in temperature is needed. Unlike convector models with a heat exchanger, Blue Flame heaters usually provide a more pronounced feeling of warmth near the appliance. Unlike ceramic infrared (IR) heaters, they tend to heat the air more than objects and people directly.