For all you DIY engineers and heating/cooling project folks, this Duda Energy plate heat exchanger is a compact powerhouse for thermal transfer applications. Measuring about 5.3 x 1.6 inches, it packs 20 plates into a seriously small footprint while providing 0.1 m² of total surface area for efficient heat exchange. Construction is 304 stainless steel with copper brazing - great general corrosion resistance for most fluids, though it doesn't play well with sulfuric or hydrochloric acids. Important note about water quality - if you're using tap water with chlorides (which most have), expect about 10-15 years of service life. With distilled water, it'll last even longer. Salt water or high-chloride environments reduce that to maybe 3-5 years, so choose your fluid wisely! The 1/4 inch female NPT connections make installation straightforward into various systems. Perfect for small-scale applications where space is tight but performance matters. If you're working with contaminated fluids, regular back flushing with fresh water will help maintain performance. Whether you're building a custom cooling system, working on an energy recovery project, or need compact heat transfer, this little unit delivers serious capability in a small package.