CTC AT 1. 300/25 Combined Buffer Tank with Integrated Domestic Hot Water Coil

Optimize your home hydronic framework performance and secure a highly versatile energy storage solution with the white standard model CTC AT 1. 300/25. 

This heavy-duty combined buffer tank serves as an intelligent all-in-one storage vessel, containing both a large volumetric system reservoir and an integrated domestic hot water (DHW) heat exchanger coil inside a single consolidated floor-standing chassis frame. The module is specifically engineered to pair with modern heat pumps, solar arrays, biomass boilers, or wood-burning devices to guarantee ideal hydronic system volumetric flows, prevent short-cycling, and eliminate piping expand-noises.

Intelligent Layout with Pre-Installed 25-Meter DHW Internal Coil

The main core of the CTC AT 1. 300/25 contains a primary shell volume of 300 liters configured to store heated water for distribution out to the building's radiator or radiant underfloor heating grids. The highlight feature of this technical model is the factory-installed, high-capacity 25-meter internal corrugated heat exchanger coil. Operating as a direct instantaneous water heater, cold incoming mains water is heated on-demand as it streams through the extensive coil line, yielding an uninterrupted supply of fresh, hygienic, and legionella-safe domestic hot water without standby tank storage requirements

Classic White Shell Design with Multi-Source Connection Ports

This combined tank is supplied in the classic and timeless standard configuration featuring a rugged, white powder-coated metal sheet enclosure. The CTC AT series design architecture incorporates a comprehensive array of manifold connection ports positioned at strategic vertical intervals along the body. This provides the mechanical contractor with ultimate layout flexibility to bridge multiple alternative energy inputs simultaneously, while placing temperature tracking dip-tubes and sensors at exact heights for automated system management.

Premium High-Density Insulation Restricts Thermal Losses

Boasting standardized external dimensions, the CTC AT 1. 300/25 fits cleanly into compact residential utility spaces or centralized mechanical plant rooms. Beneath the outer white sheet casing, the entire steel pressure vessel is wrapped in an advanced, seamless high-density polyuretan insulation jacket. This thermal layer keeps standby energy bleeding strictly restricted, trapping heat inside the core for extended periods to lower your property's overall energy bills and maximize total annual efficiency.

Product Advantages:

• Combined Energy Central: Consolidates a hydronic system volume buffer and active hot water production.
• Hygienic On-Demand DHW: Integrated 25-meter coil heats domestic fresh water instantly via through-flow.
• Multi-Source Ready: Packed with multi-level connection interfaces to link heat pumps, solar, or solid fuel.
• Thermal Core Preservation: Seamless high-grade insulation traps energy to stop standby cooling.
• Symmetrical Appliance Design: Durable white powder-coated exterior finish matches standard boiler room equipment.

Technical Specifications:

• Model: CTC AT 1. 300/25
• Article Number (SE RSK): 6519937
• EAN Number: 7333077102111
• Primary Buffer Volume: 300 liters
• Internal DHW Coil Length: 25 meters
• Installation Type: Floor-standing
• Enclosure Finish: White lacquer coated steel
• Maximum Working Pressure Shell: 3 bar
• Maximum Working Pressure Coil: 10 bar
• Application Scope: Multi-source hydronic integration and water heating
• Energy Efficiency Class: A++ (Matches highest system tier for insulated buffer vessels in hydronic networks)