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The P20EC is an energy-efficient heating boiler designed for the project market, providing both heating and hot water. It is compact, modular, high-performing, easy to install, and has low total cost of ownership. It is equipped with the exclusive ATAG Economizer, which preheats the hot water, resulting in higher hot water efficiency and more hot water. The P-Series works with the Energion M and is also compatible with other hybrid heat pumps.
| Feature | Value |
|---|---|
| Brand | Atag |
| Supplier Code | TZ20E50H |
| EAN Code | 8719874613552 |
| Discount Group | 066 |
| Width | 440 mm |
| Height | 700 mm |
| Depth | 275 mm |
| Number of Phases | 1 |
| Material Quality | Other |
| Flow Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 196 - 253 V |
| Frequency | 50 Hz |
| Closed Design | Yes |
| Nominal Hot Water Power | 25.4 kW |
| Nominal Upper Load Hot Water | 26.7 kW |
| Nominal Lower Load Hot Water | 24 kW |
| Water Heating Efficiency (Nwh) | 91 % |
| SEER (Ns) under average conditions | 93 % |
| Capacity Profile | XL |
| Energy Efficiency Class Heating | A |
| Energy Efficiency Class Water Heating | A |
| Nominal Hot Water Diameter | 1/2" (15 mm) |
| Additional Power Consumption at Full Load (ELmax) | 0.048 kW |
| Useful Heat Output at Nominal Heat Output and High Temperature Operation (P4) | 17.6 kW |
| Useful Efficiency at Nominal Heat Output and High Temperature Operation (n4) | 87.9 % |
| Additional Power Consumption in Standby Mode (Psb) | 0.004 kW |
| Standby Heat Loss (Pstby) | 0.047 kW |
| With Built-in Economizer | Yes |
| Energy Efficiency Heating | 93 % |
| Heat Exchanger Material | Stainless Steel (RVS) |
| Adjustable Heating Power | Yes |
| Nominal Cold Water Diameter | 1/2" (15 mm) |
| Minimum Flow Threshold | 1.5 l/min |
| Built-in Pump Switch | Yes |
| Gas Approval VR/SV | No |
| Gas Approval NZ | No |
| Nominal Lower Load | 18 kW |
| Nominal Upper Load | 20 kW |
| Minimum Operating Pressure | 1 bar |
| Minimum Return Temperature | 20 °C |
| Maximum Gas Supply Pressure | 60 mbar |
| Hot Water Capacity at 60 °C | 6.5 l/min |
| Built-in Weather-Dependent Regulator | Yes |
| Built-in Expansion Vessel | No |
| Hydraulic Resistance at ΔT 20 °C | 20 kPa |
| Nominal Power 80-60 °C | 17.7 kW |
| Maximum Flow Temperature (Operating Temperature) | 85 °C |
| Maximum Operating Pressure | 3 bar |
| Built-in Fill/Drain Valve | No |
| Built-in Pressure Relief Valve | No |
| External Pipe Diameter Flow | 22 mm |
| External Pipe Diameter Return | 22 mm |
| Fuel Connection | Compression |
| External Pipe Diameter Fuel | 15 mm |
| Air Supply Connection | Socket |
| Nominal Air Supply Duct Diameter | 100 mm |
| Flue Gas Discharge Connection | Socket |
| External Pipe Diameter Cold Water | 15 mm |
| External Pipe Diameter Hot Water | 15 mm |
| Condensate Connection | Other |
| External Pipe Diameter Condensate | 21.5 mm |
| Minimum Gas Supply Pressure | 20 mbar |
| Suitable for Natural Gas | Yes |
| Gas Approval VR | No |
| Cold Water Connection | Compression |
| Hot Water Connection | Compression |
| Nominal Flue Gas Duct Diameter | 60 mm |
| Burner Control High/Low | No |
| Burner Control Modulating | Yes |
| External Pipe Diameter Expansion Connection | 15 mm |
| Built-in Manometer | Yes |
| Condensing | Yes |
| Gas Approval HR | Yes |
| Pilot Flame | No |
| Second Return Connection | No |
| Control Signal On/Off | Yes |
| Control Signal High/Low | No |
| Control Signal 0-10V | No |
| Control Signal OpenTherm | Yes |
| Operation as Open Model (Air Supply) Possible | Yes |
| Nominal Power 50-30 °C | 19.4 kW |
| Suitable for Propane | No |
| Suitable for Butane | No |
| Suitable for Methane | No |
| Maximum Allowable Operating Pressure | 3 bar |
| Nominal Supply Diameter | 3/4" (20 mm) |
| Nominal Return Diameter | 3/4" (20 mm) |
| Nominal Fuel Diameter | 1/2" (15 mm) |
| Hot Water Stock | 0 l |
| Conversion Kit Required | No |
| Built-in Inlet Combination | No |
| Expansion Connection | Compression |
| CW Label | 3 |
| Gas Approval HR | Yes |
| Gas Approval NZ | No |
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