Boiler & Chiller Hex Skids


Delta Hydronics provides preplumbed and skid packaged heat transfer systems (heating, chilling, or both) for commercial and institutional aquatic heating applications. Typical skid temperature control applications include single tank systems, single pass flow through designs and multi-tank recirculating applications. All skid systems include single or dual boilers/chillers, immersion or plate style heat exchangers as well as all necessary components required to provide a complete temperature control solution.


Delta Hydronics uses High Efficiency (Up to 95%) NG/LP gas fired modulating boilers to provide some of the most efficient heat transfer skids available on the market. These can be configured either in single or dual boiler packages, and are paired with properly sized heat exchangers for your specific heat load application. All Boilers are equipped with safety controls including flow switches, pressure relief valves, and high limit shut-offs.


Single or dual air cooled R410 refrigerant chiller units packaged with immersion grid coil or plate and frame heat exchangers properly sized for your specific cooling load application. Chiller unit includes heavy gauge powder coated galvanized cabinet, beige urethane finish, multiple scroll compressor design, insulated carbon steel plate heat exchanger evaporator with brazed 316SS plates, 3/8" seamless copper tube air cooled condenser coils with aluminum plate fins, multiple condenser fans utilize direct drive ODP weather resistant motors, Trane CH530 digital control system indicating modes of operation and failure through digital display. Chiller may be ordered with optional condenser heat recovery for secondary water heating applications.

Heat Exchanger

Heat exchangers can be either plate and frame or immersion grid coil design constructed of either titanium or stainless steel materials based on your application. Heat transfer surface area is calculated based upon the heat transfer coefficient of preferred material, system flow rates and anticipated fouling factors. Alternative heat exchanger materials such as polypropylene and polyethylene are available.


The boiler/chiller and heat exchanger loop is pumped by a properly sized thermoplastic, bronze or steel pump and selected based on heat exchanger design and distance from boiler skid. A secondary pump may be needed if heat exchanger is located far from heat transfer skid.

Heat Transfer Skid

Preplumbed piping package includes all copper on the closed boiler loop and schedule 80 CPVC/PVC pipe on open aquatic system side. All systems include properly sized buffer tank to add volume to the hydronic system, minimizing short cycling and maintenance while increasing system efficiency. Air controls include air separator, expansion tank, air vents, and pressure reducing fill valve. Temperature control a includes a digital temperature controller with 15' lead titanium encapsulated temperature sensor. All heat transfer components (pumps, plate heat exchanger, air controls, electrical boxes, and temperature controls et.) are preplumbed and skid mounted on a corrosion resistant fiberglass reinforced polyester grated skid assembled on 4" fiberglass "I" beams. Systems are preplumbed, factory wired, skid assembled and leak tested for ease of customer installation. Crated skid delivery is typically four to six weeks. Boiler unit is assembled on skid, chillers are shipped loose for onsite installation.

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