Brrr! Frosty Combs and Waddles? Winter Watering Woes with Your Chickens

We've had chickens for several years. For their watering system, we use a raised 50 gallon rainwater barrel that feeds into a series of PVC pipes below it. We have nipples in the PVC pipes that the chickens drink out of.

Although the water is heated and the system itself doesn't freeze, the water that's left behind in the nipples does. I live in northern New England and have to thaw out the nipples daily for a few months each year.

I'm interested in alternatives. We're looking for an automatic heated waterer that will draw in much water as needed. We came across the PAUQRWIE 1.5 Gallon Heated Chicken Waterer and are considering purchasing one. While the water should stay heated, I'm concerned that my chickens will dip their combs and waddles in it and end up with frostbite. We have a few who have sizable combs and waddles.

If you use the PAUQRWIE or another heated waterer in the winter that requires your chickens to dip their faces towards the water to drink, have you dealt with frostbite?