OSO Delta GeoCoil DGC200 200L Heat Pump Cylinder
The OSO Delta GeoCoil DGC200 is a 200-litre ErP A-rated heat pump cylinder built to squeeze every last unit of efficiency from your heat pump installation. The only heat pump cylinder in its class to achieve an ErP "A" rating at 200 litres, it combines OSO's award-winning Vacuum Insulation Panels with a 2.6m² tube heat exchanger optimised for low-temperature heat pump operation up to 15kW. With a standing heat loss of just 1.08 kWh per day, the DGC200 saves around 400 kWh annually compared to standard glass-wool insulated cylinders — energy savings that accumulate over the cylinder's 25-year warranted lifespan.
OSO is one of the only manufacturers to have achieved an ErP "A" rating at 200 litres in a heat pump cylinder. This is critical for housebuilders and developers under Part L pressure, and for homeowners wanting to achieve the highest possible EPC rating alongside a heat pump system.
OSO's award-winning Vacuum Insulation Panels (H&V News Product of the Year) reduce heat conduction to an absolute minimum. Combined with NANOPUR foam, standing heat loss is just 49W / 1.08 kWh per day — the best in class at this capacity.
The 2.6m² smooth tube heat exchanger is engineered for heat pump primary circuits, providing excellent heat transfer at low flow temperatures without the performance compromise of a smaller coil — vital for maximising COP.
A 3kW INCOTEC immersion heater at the bottom of the tank provides peak-load backup for the heat pump and enables regular legionella pasteurisation at temperatures above 60°C — controlled externally via the building management or heating controller.
The 1.3mm thick stainless steel inner vessel is fabricated using OSO's ULTRAWELD process — delivering superior weld quality and long-term corrosion resistance. Backed by a 25-year tank warranty across all UK water hardness zones.
Supplied with a complete G3 unvented kit: Honeywell motorised valve, electronic dual cylinder thermostat, T&P relief valve (10 bar / 90–95°C), strainer, PRV, expansion relief, drain cock, tundish, and expansion vessel (12–24L). Ready for S or Y plan systems.
Two 6/8mm sensor pockets allow precise integration of heat pump temperature probes for controller-managed heating — compatible with sensors from all major heat pump manufacturers including Vaillant, Viessmann, Daikin, Mitsubishi, and Samsung.
The DGC200's ErP A rating and low heat loss support improved SAP scores and EPC ratings — helping housebuilders demonstrate Part L compliance on new build and deep retrofit projects connected to a heat pump primary source.
The tube heat exchanger has a smooth internal surface that discourages limescale adhesion — essential for maintaining long-term heat transfer efficiency, especially in hard water regions without a water softener.
Must be installed by a G3 registered competent engineer. All work must comply with Building Regulation G3 and Water Regulations. The immersion heater must be controlled externally — it must not be wired for independent operation without heat pump controller supervision. See the installation manual for full wiring and commissioning instructions.
| Specification | Value |
|---|---|
| Model / Product No. | DGC 200 — OSO 11009121 |
| Storage Volume | 191 litres (nominal 200L) |
| Diameter | 595 mm |
| Height | 1,270 mm |
| Weight Empty | 43 kg |
| Weight Full | 237 kg |
| Heat Exchanger Surface Area | 2.6 m² |
| Max Heat Pump Input | 15 kW |
| Immersion Heater | 3 kW INCOTEC / 1 × 240V |
| Thermostat Set Point | 60°C (adjustable 20–70°C) |
| Standing Heat Loss | 49W / 1.08 kWh per day (EN 12897) |
| ErP Energy Rating | A |
| T&P Relief Valve | 10 bar / 90–95°C |
| Sensor Pockets | 2 × 6/8mm |
| Expansion Vessel | 12–24L supplied |
| Appliance Feet | Adjustable 0–40mm, factory fitted |
| Tank Warranty | 25 years (stainless steel inner vessel) |
Original: $2,421.31
-65%$2,421.31
$847.46More Images
OSO Delta GeoCoil DGC200 200L Heat Pump Cylinder
The OSO Delta GeoCoil DGC200 is a 200-litre ErP A-rated heat pump cylinder built to squeeze every last unit of efficiency from your heat pump installation. The only heat pump cylinder in its class to achieve an ErP "A" rating at 200 litres, it combines OSO's award-winning Vacuum Insulation Panels with a 2.6m² tube heat exchanger optimised for low-temperature heat pump operation up to 15kW. With a standing heat loss of just 1.08 kWh per day, the DGC200 saves around 400 kWh annually compared to standard glass-wool insulated cylinders — energy savings that accumulate over the cylinder's 25-year warranted lifespan.
OSO is one of the only manufacturers to have achieved an ErP "A" rating at 200 litres in a heat pump cylinder. This is critical for housebuilders and developers under Part L pressure, and for homeowners wanting to achieve the highest possible EPC rating alongside a heat pump system.
OSO's award-winning Vacuum Insulation Panels (H&V News Product of the Year) reduce heat conduction to an absolute minimum. Combined with NANOPUR foam, standing heat loss is just 49W / 1.08 kWh per day — the best in class at this capacity.
The 2.6m² smooth tube heat exchanger is engineered for heat pump primary circuits, providing excellent heat transfer at low flow temperatures without the performance compromise of a smaller coil — vital for maximising COP.
A 3kW INCOTEC immersion heater at the bottom of the tank provides peak-load backup for the heat pump and enables regular legionella pasteurisation at temperatures above 60°C — controlled externally via the building management or heating controller.
The 1.3mm thick stainless steel inner vessel is fabricated using OSO's ULTRAWELD process — delivering superior weld quality and long-term corrosion resistance. Backed by a 25-year tank warranty across all UK water hardness zones.
Supplied with a complete G3 unvented kit: Honeywell motorised valve, electronic dual cylinder thermostat, T&P relief valve (10 bar / 90–95°C), strainer, PRV, expansion relief, drain cock, tundish, and expansion vessel (12–24L). Ready for S or Y plan systems.
Two 6/8mm sensor pockets allow precise integration of heat pump temperature probes for controller-managed heating — compatible with sensors from all major heat pump manufacturers including Vaillant, Viessmann, Daikin, Mitsubishi, and Samsung.
The DGC200's ErP A rating and low heat loss support improved SAP scores and EPC ratings — helping housebuilders demonstrate Part L compliance on new build and deep retrofit projects connected to a heat pump primary source.
The tube heat exchanger has a smooth internal surface that discourages limescale adhesion — essential for maintaining long-term heat transfer efficiency, especially in hard water regions without a water softener.
Must be installed by a G3 registered competent engineer. All work must comply with Building Regulation G3 and Water Regulations. The immersion heater must be controlled externally — it must not be wired for independent operation without heat pump controller supervision. See the installation manual for full wiring and commissioning instructions.
| Specification | Value |
|---|---|
| Model / Product No. | DGC 200 — OSO 11009121 |
| Storage Volume | 191 litres (nominal 200L) |
| Diameter | 595 mm |
| Height | 1,270 mm |
| Weight Empty | 43 kg |
| Weight Full | 237 kg |
| Heat Exchanger Surface Area | 2.6 m² |
| Max Heat Pump Input | 15 kW |
| Immersion Heater | 3 kW INCOTEC / 1 × 240V |
| Thermostat Set Point | 60°C (adjustable 20–70°C) |
| Standing Heat Loss | 49W / 1.08 kWh per day (EN 12897) |
| ErP Energy Rating | A |
| T&P Relief Valve | 10 bar / 90–95°C |
| Sensor Pockets | 2 × 6/8mm |
| Expansion Vessel | 12–24L supplied |
| Appliance Feet | Adjustable 0–40mm, factory fitted |
| Tank Warranty | 25 years (stainless steel inner vessel) |
Product Information
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Description
The OSO Delta GeoCoil DGC200 is a 200-litre ErP A-rated heat pump cylinder built to squeeze every last unit of efficiency from your heat pump installation. The only heat pump cylinder in its class to achieve an ErP "A" rating at 200 litres, it combines OSO's award-winning Vacuum Insulation Panels with a 2.6m² tube heat exchanger optimised for low-temperature heat pump operation up to 15kW. With a standing heat loss of just 1.08 kWh per day, the DGC200 saves around 400 kWh annually compared to standard glass-wool insulated cylinders — energy savings that accumulate over the cylinder's 25-year warranted lifespan.
OSO is one of the only manufacturers to have achieved an ErP "A" rating at 200 litres in a heat pump cylinder. This is critical for housebuilders and developers under Part L pressure, and for homeowners wanting to achieve the highest possible EPC rating alongside a heat pump system.
OSO's award-winning Vacuum Insulation Panels (H&V News Product of the Year) reduce heat conduction to an absolute minimum. Combined with NANOPUR foam, standing heat loss is just 49W / 1.08 kWh per day — the best in class at this capacity.
The 2.6m² smooth tube heat exchanger is engineered for heat pump primary circuits, providing excellent heat transfer at low flow temperatures without the performance compromise of a smaller coil — vital for maximising COP.
A 3kW INCOTEC immersion heater at the bottom of the tank provides peak-load backup for the heat pump and enables regular legionella pasteurisation at temperatures above 60°C — controlled externally via the building management or heating controller.
The 1.3mm thick stainless steel inner vessel is fabricated using OSO's ULTRAWELD process — delivering superior weld quality and long-term corrosion resistance. Backed by a 25-year tank warranty across all UK water hardness zones.
Supplied with a complete G3 unvented kit: Honeywell motorised valve, electronic dual cylinder thermostat, T&P relief valve (10 bar / 90–95°C), strainer, PRV, expansion relief, drain cock, tundish, and expansion vessel (12–24L). Ready for S or Y plan systems.
Two 6/8mm sensor pockets allow precise integration of heat pump temperature probes for controller-managed heating — compatible with sensors from all major heat pump manufacturers including Vaillant, Viessmann, Daikin, Mitsubishi, and Samsung.
The DGC200's ErP A rating and low heat loss support improved SAP scores and EPC ratings — helping housebuilders demonstrate Part L compliance on new build and deep retrofit projects connected to a heat pump primary source.
The tube heat exchanger has a smooth internal surface that discourages limescale adhesion — essential for maintaining long-term heat transfer efficiency, especially in hard water regions without a water softener.
Must be installed by a G3 registered competent engineer. All work must comply with Building Regulation G3 and Water Regulations. The immersion heater must be controlled externally — it must not be wired for independent operation without heat pump controller supervision. See the installation manual for full wiring and commissioning instructions.
| Specification | Value |
|---|---|
| Model / Product No. | DGC 200 — OSO 11009121 |
| Storage Volume | 191 litres (nominal 200L) |
| Diameter | 595 mm |
| Height | 1,270 mm |
| Weight Empty | 43 kg |
| Weight Full | 237 kg |
| Heat Exchanger Surface Area | 2.6 m² |
| Max Heat Pump Input | 15 kW |
| Immersion Heater | 3 kW INCOTEC / 1 × 240V |
| Thermostat Set Point | 60°C (adjustable 20–70°C) |
| Standing Heat Loss | 49W / 1.08 kWh per day (EN 12897) |
| ErP Energy Rating | A |
| T&P Relief Valve | 10 bar / 90–95°C |
| Sensor Pockets | 2 × 6/8mm |
| Expansion Vessel | 12–24L supplied |
| Appliance Feet | Adjustable 0–40mm, factory fitted |
| Tank Warranty | 25 years (stainless steel inner vessel) |
