The International Fuel Gas Code only requires 1 cfm of active supply ventilation per 2400 BTU/hr of burner size (for both combustion & dilution air make up) for gas appliances in doored-off air tight mechanical rooms. Thus a 40K furnace can’t/won’t draw more than 40K/2.4K= 16.7 cfm,...
electric fireplace burner bed made of artificial logs for realistic burning flames.the led fireplace has 9 led flame colors, 5 levels of flame brightness adjustment, and can be operated by buttons on the fireplace or by remote control. the heater has two levels of heat output adjustment, and ...