LMNT Fast Boiler Tank 500L – Indirectly Heated Stainless Steel Buffer Tank with Coil for Heat Pump Systems

Experience top-tier performance and maximum durability with the LMNT Fast Boiler Tank 500L, a premium-quality indirectly heated boiler from Coolmark. Specially designed for modern heat pump systems and sustainable energy solutions, this 500-litre unit combines storage capacity, fast heating, and high efficiency in one robust horizontal tank—perfect for both residential and commercial applications where hot water comfort and energy efficiency are key.

Crafted from high-grade Duplex 2205 stainless steel, the tank offers exceptional resistance to corrosion, stress corrosion, and high temperatures. This makes the LMNT series particularly suitable for demanding long-term use in combination with heat pumps, solar thermal systems, or hybrid heating solutions.

The built-in spiral coil heat exchanger ensures rapid and efficient water heating via indirect energy transfer. This coil is specially optimised for low-temperature sources such as heat pumps, resulting in significantly higher energy efficiency than standard boiler systems.

Thanks to the Fast Heating Technology, this tank delivers short heating times and continuous hot water availability, even during peak demand. Ideal for large households, hotels, sports facilities, or commercial installations.

With a total volume of 500 litres, the tank not only provides a generous supply of domestic hot water, but also functions as a buffer tank in advanced central heating systems. The high-density insulation reduces heat loss to an absolute minimum, further enhancing energy savings.

✅ Key Benefits:

• 500-litre capacity – generous hot water and heating buffer

• Duplex 2205 stainless steel – corrosion-resistant, hygienic, and heat-stable

• Spiral heat exchanger – optimised for heat pump and low-temp systems

• Indirect heating – compatible with heat pumps, solar thermal, or hybrid systems

• Fast heating – short heat-up time, high efficiency

• High-grade insulation – minimal standby losses, maximum efficiency

• Horizontal design – ideal for tight technical spaces

⚙️ Applications:

• Heat pump systems (air-to-water, ground-source)

• Solar thermal installations

• Hybrid heating systems

• Hotels, apartment buildings, gyms, commercial sites

• Large private homes with high hot water demand

The LMNT Fast Boiler Tank 500L is more than just a boiler – it’s a high-performance buffer solution designed for those who demand reliability, speed, and energy efficiency in one compact, future-proof system. Pair it with your heat pump or sustainable heating setup and enjoy long-lasting performance with a minimal environmental footprint.