Water-to-Air Heat Exchanger 18x20 in, 3-Row, 3/8 in Ports

Water to air heat exchanger transfers heat fast to stabilize air and water temperatures in demanding HVAC, hydronic, and industrial setups. Built with copper-brazed construction and epoxy-coated aluminum fins, it’s designed for high compatibility, leak resistance, and efficient heat exchange. The 18" x 20" plate area and 3-row copper tube layout deliver strong performance while the thickened interfaces support secure plumbing connections.

• Delivers efficient heat transfer with 3-row 3/8" seamless copper tubes and 242 aluminum fins for high-surface-area exchange.


• Withstands harsh conditions with copper-brazed edges/contact points and epoxy-coated fins for corrosion and wear resistance.


• Supports secure installs with thickened threaded copper ports designed to reduce seepage and simplify hookups.


• Handles wide temperature ranges for demanding systems: -40°C to 180°C (-40°F to 356°F).


• Fits many applications with dual-use design for water heating/cooling via forced-air or fan-coil style setups.

Designed for quick-scan buyers who need dependable heat exchange without constant maintenance, this copper-and-aluminum unit focuses on tight construction, strong thermal performance, and stable operation under pressure. Each exchanger is vacuum brazed and leak tested to help reduce micro-leak risk over time. Use it for hydronic air handlers, workshop heating, process cooling, or custom builds where compact capacity matters. Grab yours today and size your system with confidence.

• Type: Water to air heat exchanger (dual use)


• Plate area: 18 x 20 in (45.72 x 50.8 cm)


• Overall size (L x W x H): 25.59 x 18.03 x 3.62 in (650 x 458 x 92 mm)


• Copper tubes: 3-row, 3/8 in (1 cm) ports


• Aluminum fins: 242 pcs (12 fins per inch)


• Operating temperature: -40°C to 180°C (-40°F to 356°F)


• Max working pressure: 2.5 MPa


• Heat capacity: ≥133K BTU


• Materials: Copper, aluminum fins (epoxy-coated)


• Color: Gold


• Net weight (with accessories): 17.64 lb (8 kg)


• Certification: CE