With all three models (the 6000C, 6000CL and 6000CLX) there’s a 50-percent flame and heat turndown – something that makes the fireplace give you the right amount of heat when you want it. The IntelliFire Plus ignition system means there’s no standing pilot light wasting fuel on this zero clearance gas fireplace. Intermittent-pilot ignition (IPI) offers seamless transition from AC to battery backup in a power outage. With the 6000CL (35-thousand BTUs) model you get 100% turndown via the LED accent lighting. Go to the 6000CLX (40-thousand BTUs) for all that and a fan, LED illuminated embers and premium logset. Seven different fronts in three finishes -black, New Bronze and Graphite) complete the look to coordinate with your home. If the 6000CLX has all the features you’re looking for, but you yearn for something a little bigger in a zero clearance gas fireplace, check out the 8000 series. Like the 6000 series, the 8000 series comes in three different models with the same features as the 600 series. You have the same choices in fronts and colors. 6000 C Series dimensions: 39 7/8″ h x 41″w x 21 1/2″d 8000 C Series dimensions: 41 7/8″ high x 48″ wide x 21 ” d.