Hello Daniel, I doubt it. The fresh air and flue purposely goes on opposite direction just for that reason. I think is just too much byproducts of gas burnt. It accumulates and forms small rocks , It was 5 years without a cleaning, See you , Thanks so much for your comment!!
Great video man! Perfectly explained and well put together! 10/10
Awesome helped a lot!
were the pebbles kinda like coffee grains? could be flue recirculating in the fresh air
Hello Daniel, I doubt it. The fresh air and flue purposely goes on opposite direction just for that reason. I think is just too much byproducts of gas burnt. It accumulates and forms small rocks , It was 5 years without a cleaning, See you , Thanks so much for your comment!!
Thank you