The Fenwal 35-80 series direct spark gas ignition control provides 0.2 second timing accuracy, sparks 60 times a second and stops when it senses a flame. It combines local and remote flame sensing and field-adjustable fan off display onto a single PC board. Standard features include combustion blower control, indoor air fan control, thermostat input, diagnostics, heat/cool relay and 24-V input voltage. Measurements are 4.5 x 5.75 in. (115 x 145 mm).