Abstract: An air-proportionality type boiler is provided. Since the air-proportionality type boiler directly controls a current proportionality gas valve according to an amount of air by using a low-price AC air blower, a low-price current proportionality gas valve and a low-price airflow sensor, a gas supply amount can be adjusted with respect to all ranges of the airflow amount. Also, an appropriate calorie required for proportionally controlling a present circulation water temperature to a set temperature, can be supplied. The boiler can be safely ignited to perform a combustion operation under the optimal condition although abnormal weathers and conditions. Accordingly, since a combustion performance is enhanced, combustion efficiency is high and a fuel cost can be saved.

Abstract: A new and distinct cultivar of Browallia plant named ‘UNHBR4’, characterized by numerous single flowers that are purple pink in color with a small white center, compact and rounded plant growth, stems that do not break or separate on the center of the mature plant, and good performance in partial shade in the garden and as a hanging basket.