Tml MX2W00800R Maxiwarm combined storage tank lt. 800 in AISI 316L stainless steel with two fixed rigid insulation coils

Combined Thermal Storage Tank Maxiwarm 749 Litres – Instant DHW Production – MX2W00800R

The Maxiwarm MX2W00800R is a combined thermal storage tank with a capacity of 749 litres, designed by TML Industrie Loddo for instant domestic hot water (DHW) production via a high-efficiency corrugated stainless steel AISI 316L heat exchanger, combined with heating water storage in a carbon steel buffer. The system is configured with 2 primary heat exchangers: lower steel spiral 2.5 m² + upper steel spiral 2.0 m².

Full Technical Specifications – MX2W00800R

• External buffer (heating storage):
• Material: Carbon steel S235Jr – bare inside – anti-rust coating outside
• Max pressure / Max temperature: 3 bar / 95°C
• Buffer capacity: 749 litres
• DHW heat exchanger (instant production):
• Material: AISI 316L stainless steel (1.4404) – pickled and passivated
• Type: Fixed corrugated tube with high exchange surface
• Exchange surface: 7.0 m²
• Max pressure / Max temperature: 6 bar / 95°C
• Thermal output at 65°C primary: 70.6 kW
• DHW available (65°C, 20 L/min, fully heated tank): 357 litres
• Lower primary heat exchanger (solar): raw carbon steel – fixed spiral coil – 2.5 m² – max 10 bar / 95°C
• Upper primary heat exchanger (boiler/biomass): raw carbon steel – fixed spiral coil – 2.0 m² – max 10 bar / 95°C
• Insulation: rigid PU foam + PVC 100 mm (Fire class B3 DIN 4102)
• ErP: Class C – Heat loss: 109.9 W
• Dimensions (insulated body): Ø 790 mm × Height 1750 mm
• External diameter (insulation): Ø 990/1050 mm
• Tilt diagonal R: 1745 mm
• Indicative weight: ~212 kg
• Electric heater connection: 1½" fitting (not included)
• Warranty: 5 years

Instant DHW Production – Corrugated AISI 316L Heat Exchanger

Unlike "tank in tank" systems, the Maxiwarm produces DHW instantaneously: mains water flows through the corrugated AISI 316L heat exchanger in contact with the hot buffer water and is heated without intermediate storage. The corrugated tube geometry maximises turbulence and exchange surface, delivering high thermal outputs: up to 70.6 kW at 65°C primary. The system requires no internal DHW storage and guarantees high hygiene standards through on-demand production with no water stagnation.

Multi-Energy Compatibility and Applications

The MX2W00800R is compatible with multiple heat sources: solar thermal collectors (lower heat exchanger steel spiral), biomass boiler (dedicated connections), backup boiler and heat generator at high or low temperature. The large 749-litre capacity ensures adequate thermal storage for large residential buildings, villas and commercial premises. Buffer fluid must operate in a closed loop (oxygen-free).

Standards and Certifications

The MX2W00800R complies with: PED Directive 2014/68/EU (Art. 4 Par. 3), Italian D.M. 6 April 2004 N.174, ErP Directive 2009/125/EC.