Upgrade your heating and cooling system with the VEVOR Heat Exchanger! Measuring 18"x 20", this robust unit features 3 rows of 3/8" copper ports and 242 aluminum fins, ensuring efficient heat transfer for optimal performance. Perfect for outdoor wood furnaces, it’s designed to enhance residential heating and cooling systems, as well as forced air heating setups. Its durable construction guarantees longevity, while the compact design allows for easy installation. Experience reliable warmth and comfort in your home with this high-quality heat exchanger that meets all your heating needs!