Copper-finned tube, non-condensing appliances are the foundation of Lochinvar’s success. In 1993, Lochinvar introduced the Copper-Fin II, the first horizontal chassis, copper-finned tube boiler to operate with fan-assisted combustion. Along with high thermal efficiency, gasketless heat exchangers, and multiple venting options we have added Lochinvar’s exclusive SMART SYSTEM™ control.

Nine models from 399,000 to 2,070,000 Btu/hr input provide you with exceptional products with a long list of new features in addition to the established features which redefined the industry. Lochinvar’s Copper-Fin II was the first proportional-fired, fan-assisted boiler on the market. Every model features a small footprint for easy passage through a 36” door, low NOx – third-party tested to less than 20 PPM, Stack Frames that can put twice the Btu/hr input in the same space, and vent diameters up to 8” smaller than conventional atmospheric boilers.


Thermal Efficiency

Lochinvar Copper-Fin II boilers are high-efficiency boilers with 85% thermal efficiency. This means that 85¢ out of every fuel dollar goes into heating the water, dramatically reducing the operating cost of the equipment.

The Copper-Fin II high-efficiency commercial boiler achieves this efficiency through the combination of an advanced fan-assisted combustion system and gasketless heat exchanger. The heat energy from the combustion process is transferred to the water as it passes through the solid copper finned tube heat exchanger. The sealed combustion design of the Copper-Fin II eliminates external heat losses, this means that the energy dollars heat the water, not the mechanical room.


Copper-Fin II Dimensions & Specifications

Gasketless Heat Exchanger

In 1989, Lochinvar was the first water heater manufacturer to offer gasketless cast iron & copper-finned tube heat exchangers. Our unique gasketless design enhances reliability by eliminating o-rings and gaskets found on other brands. The heat exchanger features glass-lined headers and copper-finned tubes with extruded integral fins spaced 7-fins per inch for exceptional heat transfer. The heat exchanger is built to ASME construction standards for 160 psi working pressure and is backed by a ten-year limited warranty.


Space Saving, Service Friendly Design

The enhanced Lochinvar Copper-Fin II boiler models offer the same reliable operation in a new service-friendly design. The gas inlet, internal controls, and building management connections have been repositioned to the front of the appliance for easier service and simpler installation. The built-in air filter reduces maintenance and improves performance with a field convertible option to install the air intake on the rear or the right side of the boiler. In addition, Lochinvar was the first manufacturer to offer factory welded Stack Frames that allow you to put two boilers in the space for one.


Multiple Venting Options

The Copper-fin II offers eight venting options to meet the most challenging installation requirements. The Copper-Fin II can vent vertically in Category I with double wall “B” vent or horizontally in Category IV with AL29-4C stainless steel vent material. Vent termination can be Rooftop or Sidewall with combustion air drawn naturally from the equipment room or via dedicated air intake piping.

And if floor space is limited, the Copper-Fin II boiler can be installed outdoors with an optional Outdoor Vent Cap.

Venting options for the Copper-Fin II Boiler

The Foundation of Lochnivar Becomes Stronger

The most exciting addition to the Copper-Fin II is the SMART SYSTEM™ control. The SMART SYSTEM™ is an advanced, state of the art integrated operating control. We introduced the SMART SYSTEM™ control in 2005 and it has delivered proven operation in thousands of demanding commercial applications. The control provides the installer, owners and operators with precise temperature control and diagnostic information.

Cascade Options

The “lead unit” boiler modulates with demand to capacity. As demand increases, additional boilers fire and modulate to capacity. This continues, with additional boilers firing and modulating to capacity until all units are operating. Every 24 hours, the SMART SYSTEM™ automatically shifts the lead boiler role to the next in the sequence, distributing lead-lag runtimes equally.

Proportional Firing

Proportional firing divides a single manifold of multiple burners into smaller, independent stages. With up to four stages of individual operation, the SMART SYSTEM™ control can reduce the firing rate down to approximately 25% Btu/hr input. This simple but effective design matches the boiler’s firing capacity to the constantly changing system demand. Full Fire or On/Off combustion systems often fire the entire gas train in short, inefficient bursts. Stage firing delivers the Btu’s required in smoother and longer burn cycles which will improve operation and reduce component fatigue.

About Oslin

No matter the kind of project you are working on, Oslin Nation Company has the hydronic heating and cooling solutions you are looking for. We have been a Lochinvar boiler rep as well as the distributor for high-efficiency boilers and water heaters in San Antonio and Houston Texas and are proud to provide their quality products to our customers.