The HTL12x12 Water-to-Air Heat Exchanger is designed to transfer heat between hot water and an existing forced-air system. With a 60,000 BTU capacity, 1" copper sweat connections, and a compact 12" × 12" finned area, it is suitable for a wide range of residential and commercial heating and cooling applications.

The heat exchanger features 3 rows of 3/8" seamless copper tubes and 12 aluminum fins per inch, providing an efficient heat transfer surface while maintaining a compact design.

Product Highlights

• Design Pressure: 175 PSI
• Test Pressure: 263 PSI
• Maximum Operating Temperature: 350°F
• Warranty: 1 year against manufacturer's defects
• Listing: ETL Listed

Product Information

Model	HTL12x12	Fitting Size	1" copper sweat	Design Pressure	175psi
Capacity*	60,000 Btu	Rating	175psi @ 350F	Test Pressure	263psi
Coils	3 rows of 3/8", copper	Fins	12 per inch, aluminum	Materials	Steel, Copper, Aluminum
Min. Operating Temp.	32F	Max. Operating Temp.	350F	Dimensions	Finned Area12" x 12" x 3.5"

*Capacity is based on 180F boiler output

Key Features

Aluminum Wave Fins

The aluminum fins feature a wavy surface pattern that provides additional heat transfer surface area and supports airflow through the finned section. The 12 fins-per-inch configuration provides a compact heat transfer surface for forced-air applications.

Seamless Copper Tubes

The heat exchanger uses 3 rows of 3/8" seamless copper tubes. Copper provides good thermal conductivity, while the smooth tube surface helps maintain fluid flow with relatively low internal flow resistance.

Epoxy-Coated Aluminum Fins

The aluminum fins are coated with epoxy to improve surface durability and resistance to wear. The coating also helps protect the fin surface during normal operation and handling.

Steel Support Structure

A steel frame supports the heat exchanger assembly and provides structural stability during installation and operation.

Applications

The HTL12x12 Water-to-Air Heat Exchanger transfers heat from a boiler or other hot-water source into an existing forced-air system. It is suitable for residential and commercial HVAC applications where hot-water-to-air heat transfer is required.

Compatible heat sources may include:

• Indoor boilers
• Outdoor wood boilers
• Natural gas boilers
• Propane boilers
• Oil boilers
• Electric boilers
• Other hot-water heating equipment

Typical applications include:

• Residential and Commercial Heating and Cooling
• Apartment and Condominium HVAC Systems
• Forced-Air Heating
• Outdoor Wood Furnace Systems
• Hybrid Heating Systems
• Air Conditioning
• Inverter Cooling
• Dehumidification

Installation

The HTL12x12 is designed for integration into forced-air heating and cooling systems. Depending on the system configuration, the heat exchanger can be connected to the existing piping using the appropriate fittings and secured within the air-handling system.

When installing the heat exchanger, ensure that there is sufficient clearance around the unit for proper airflow, connection, inspection, and maintenance.

Important: If the air system uses an overheat sensor, install the heat exchanger far enough away from the sensor so that heat from the exchanger does not interfere with sensor readings.

For proper system performance, the heat exchanger should be sized according to the application, water temperature, airflow, and other system operating conditions.

Water to Air Heat Exchanger Size Choosing Guide.pdf

Support
We have worked with heating systems for over 10 years and are happy to help you with any questions or concerns that you may have. You can email us at support@alfaheating.com or call us at 833-328-6888 for help with your heating projects.