Joule Direct Mild Steel Buffer Tanks – 100L to 2000L
The Joule Direct Mild Steel Buffer Tank is designed to increase water volume and provide thermal storage within closed-loop heating systems. Available in sizes from 100 to 2000 litres, the range is suitable for air source and ground source heat pumps, biomass systems and other commercial heating applications.
Every model on this page is a direct, no-coil buffer vessel. Manufactured from non-enamelled mild steel, these tanks are intended for heating-system water rather than potable hot-water storage.
Image for illustrative purposes only. Connection sizes, quantities and positions vary by model. Please refer to the relevant technical drawing before installation.
Key Features
- Direct mild-steel buffer vessel with no internal coil
- Available in nominal capacities from 100L to 2000L
- Suitable for air source and ground source heat pump systems
- Can help increase system volume and reduce heat-source cycling
- Multiple connection points for flexible system integration
- Insulated construction with a protective outer casing
Available Sizes and Specifications
| Size | Product Code | Volume | H × D |
|---|---|---|---|
| 100L | BBMSD-00100NFC | 107L | 1010 × 518mm |
| 200L | BBMSD-00200NFC | 223L | 1140 × 670mm |
| 300L | BBMSD-00300NFC | 322L | 1615 × 670mm |
| 400L | BBMSD-00380NFC | 387L | 1683 × 700mm |
| 500L | BBMSD-00500NFC | 467L | 1923 × 700mm |
| 800L | BBMSD-00800NFC | 728L | 1734 × 950mm |
| 1000L | BBMSD-01000NFC | 883L | 2074 × 950mm |
| 1500L | BBMSD-01500NFC | 1500L | 2000 × 1100mm |
| 2000L | BBMSD-02000NFC | 2023L | 2500 × 1100mm |
Please note: Dimensions are approximate and shown as overall height × overall diameter where confirmed. Check site access and request the current model-specific technical drawing before ordering.
Suitable Applications
- Air source and ground source heat pump systems
- Biomass and solid-fuel heating systems
- Commercial heating installations
- Multi-zone systems requiring additional water volume
- Systems where improved thermal stability or reduced cycling is required
Larger and Bespoke Buffer Vessels
Joule can also supply 3000L, 4000L and 5000L buffer vessels, along with indirect models, bespoke configurations and vessels with an inspection hatch. Contact our technical sales team for pricing, lead times and specification support.
Technical Support
Not sure which buffer size or connection arrangement is right for your system? Send us the heat-source output, system volume and installation requirements, and our team will help you identify a suitable option.
Technical specifications and dimensional drawings are available on request.
Large-vessel deliveries: Please confirm site access and suitable offloading facilities before ordering.