Grant Vortex External Condensing Oil Boiler 36-46kW
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Grant Vortex External Condensing Oil Boiler 36-46kW
(Approx. 3-5 working days)


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The Grant Vortex External 36-46kW is a free standing, oil fired condensing boiler designed for outdoor installation where internal space is limited. It features a powder coated weatherproof casing and incorporates the award winning Vortex stainless steel heat exchanger for high thermal efficiency.
This oil boiler provides central heating for larger properties and is compatible with indirect hot water cylinders. It operates on Class C2 kerosene and supports up to a 30% bio-kerosene blend (B30K), making it suitable for future low carbon fuel use. The unit includes a Riello RDB burner and a factory fitted frost protection thermostat preset to 2°C for reliable operation in cold conditions.
The Vortex External model is fully compliant with OFTEC standards and EC directives. It comes with multi-directional flue options and side or rear flue exits for flexible installation. Annual servicing is simplified by front access to all internal components.
- Output range: 41kW to 46kW for large heating loads
- Powder coated casing for outdoor durability
- Riello RDB burner with plug and socket connection
- Factory fitted frost stat preset to 2°C
- Compatible with B30K bio-kerosene blend
| Brand | Grant |
|---|---|
| Width | 800 mm |
| Energy Rating | Not Selected |
| Applicable Standards | OFTEC Approved |
| Connection Size | 28 mm |
| Depth | 505 mm |
| Flue Included | No |
| Fuel Type | Class C2 Kerosene (B30K compatible) |
| Heating Energy Rating | A |
| Heat Output Range | 41kW (set) – 46kW (max) |
| Height | 908 mm |
| Model Name / No | VORTMOD3646P |
| Weight | 169 kg |
| Mount Type | Floor Mounted |
| Hydrogen Ready | No |
| NOx Class | Class 2 |
| Sound Power Level (dB A): | 66 dB |
| Burner Type | Riello RDB 2.2 |
| Casing Material | Powder Coated Steel |
| Frost Protection | Factory fitted frost stat |
| Seasonal Efficiency | 92.6% |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.
The Grant Vortex External 36-46kW is a free standing, oil fired condensing boiler designed for outdoor installation where internal space is limited. It features a powder coated weatherproof casing and incorporates the award winning Vortex stainless steel heat exchanger for high thermal efficiency.
This oil boiler provides central heating for larger properties and is compatible with indirect hot water cylinders. It operates on Class C2 kerosene and supports up to a 30% bio-kerosene blend (B30K), making it suitable for future low carbon fuel use. The unit includes a Riello RDB burner and a factory fitted frost protection thermostat preset to 2°C for reliable operation in cold conditions.
The Vortex External model is fully compliant with OFTEC standards and EC directives. It comes with multi-directional flue options and side or rear flue exits for flexible installation. Annual servicing is simplified by front access to all internal components.
- Output range: 41kW to 46kW for large heating loads
- Powder coated casing for outdoor durability
- Riello RDB burner with plug and socket connection
- Factory fitted frost stat preset to 2°C
- Compatible with B30K bio-kerosene blend
| Brand | Grant |
|---|---|
| Width | 800 mm |
| Energy Rating | Not Selected |
| Applicable Standards | OFTEC Approved |
| Connection Size | 28 mm |
| Depth | 505 mm |
| Flue Included | No |
| Fuel Type | Class C2 Kerosene (B30K compatible) |
| Heating Energy Rating | A |
| Heat Output Range | 41kW (set) – 46kW (max) |
| Height | 908 mm |
| Model Name / No | VORTMOD3646P |
| Weight | 169 kg |
| Mount Type | Floor Mounted |
| Hydrogen Ready | No |
| NOx Class | Class 2 |
| Sound Power Level (dB A): | 66 dB |
| Burner Type | Riello RDB 2.2 |
| Casing Material | Powder Coated Steel |
| Frost Protection | Factory fitted frost stat |
| Seasonal Efficiency | 92.6% |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.


