The Q-series boiler in the ATAG range provides a wonderful sense of comfort and luxury. Thanks to the integrated storage tank, instant hot water is available at multiple outlets simultaneously – with no waiting time. "Showerpower" – providing a comfortable, powerful shower stream or quickly filling a bath is no problem for the Q boiler.
Naturally, the efficiency for heating is also of a high level. The lower the temperature in the distribution system, the higher the efficiency! In combination with the ATAG One thermostat, an A+ energy label is achieved for space heating.
Choosing Stainless Steel (RVS)
The stainless steel heat exchanger, the "heart" of the boiler, is the most important and also the most vulnerable part of the boiler. This heat exchanger is made from stainless steel, which is resistant to corrosion and wear and ensures maximum heat transfer. This not only reduces maintenance frequency but also heating costs. After 15 years, the P-series is still as efficient as it was on the first day of purchase.
Heating Energy Efficiently with ATAG One
The ATAG One is a smart thermostat that thinks ahead. Thanks to its so-called "switch-on optimization," the ATAG One considers when it should be warm in the home, fully according to your preferences.
Features
| Feature |
Value |
| Fast and plentiful hot water |
Yes |
| Available at multiple outlets simultaneously |
Yes |
| No waiting for hot water thanks to integrated boiler (in combi-boiler) |
Yes |
| Constantly high efficiency throughout the lifespan |
Yes |
| Low energy consumption |
Yes |
| Compatible with ATAG One smart thermostat |
Yes |
| 15-year warranty on the stainless steel heat exchanger |
Yes |
Technical Specifications
| Feature |
Value |
| Brand |
Atag |
| Supplier Code |
TA3BA50H |
| EAN Code |
8719874659581 |
| Discount Group |
065 |
| Width |
840 mm |
| Height |
680 mm |
| Depth |
385 mm |
| Power Supply |
230 V |
| Number of Phases |
1 |
| Material Quality |
Other |
| Supply Connection |
Compression |
| Return Connection |
Compression |
| Nominal Voltage |
196 - 253 V |
| Frequency |
50 Hz |
| Closed Version |
Yes |
| Nominal Hot Water Output |
22.1 kW |
| Nominal Upper Hot Water Output |
35 kW |
| Nominal Lower Hot Water Output |
31.5 kW |
| Energy Efficiency of Water Heating (Nwh) |
80% |
| SEER (Ns) under average conditions |
94 |
| Capacity Profile |
XL |
| Space Heating Energy Efficiency Class |
A |
| Water Heating Energy Efficiency Class |
A |
| Nominal Diameter Hot Water |
1/2" (15) |
| Supplementary Electricity Consumption at Full Load (ELmax) |
0.079 kW |
| Useful Heat Output at Nominal Output and Operation at High Temperature (P4) |
22.1 kW |
| Useful Efficiency at Nominal Output and Operation at High Temperature (n4) |
88.4% |
| Supplementary Electricity Consumption in Standby Mode (Psb) |
0.003 kW |
| Standby Heat Loss (Pstby) |
0.045 kW |
| Built-in Economizer |
No |
| Space Heating Efficiency |
94% |
| Maximum Hydrogen Percentage in Mixture with NAT Gas |
0% |
| Suitable for Low-Calorific Natural Gas |
Standard factory setting |
| Suitable for High-Calorific Natural Gas |
Manually adjustable |
| Suitable for Propane |
With a conversion kit, not included |
| Suitable for Butane |
Not suitable |
| Suitable for Methane |
Not suitable |
| Suitable for LPG |
Not suitable |
| Suitable for Hydrogen |
Not suitable |
| Heat Exchanger Material |
Stainless Steel (RVS) |
| Adjustable Heating Power |
Yes |
| Nominal Diameter Cold Water |
1/2" (15) |
| Built-in Pump Switching |
Yes |
| Gas Certification VR/SV |
No |
| Gas Certification NZ |
No |
| CW Label |
4 |
| Nominal Lower Load |
22.5 kW |
| Nominal Upper Load |
25 kW |
| Minimum Operating Pressure |
1 bar |
| Minimum Return Temperature |
20 °C |
| Maximum Gas Pressure |
60 mbar |
| Hot Water Capacity at 60 °C |
7.5 l/min |
| Built-in Weather-dependent Regulator |
Yes |
| Built-in Expansion Tank |
No |
| Hydraulic Resistance at dT 20 °C |
25 kPa |
| Nominal Power 80-60 °C |
21.9 kW |
| Maximum Supply Temperature (Operating Temperature) |
85 °C |
| Maximum Operating Pressure |
3 bar |
| Built-in Filling/Drain Valve |
No |
| Built-in Pressure Relief Valve |
Yes |
| External Pipe Diameter Supply |
28 mm |
| External Pipe Diameter Return |
28 mm |
| External Pipe Diameter Fuel |
15 mm |
| Air Supply Connection |
Muff |
| Nominal Channel Diameter Air Supply |
80 mm |
| Flue Gas Outlet Connection |
Muff |
| External Pipe Diameter Cold Water |
15 mm |
| External Pipe Diameter Hot Water |
15 mm |
| Condensate Connection |
Other |
| External Pipe Diameter Condensate |
24 mm |
| Minimum Gas Pressure |
20 mbar |
| Suitable for Natural Gas |
Yes |
| Gas Certification VR |
No |
| Cold Water Connection |
Compression |
| Hot Water Connection |
Compression |
| Nominal Flue Gas Outlet Diameter |
80 mm |
| Burner Control High/Low |
No |
| Modulating Burner Control |
Yes |
| Nominal Expansion Connection Diameter |
DN 20 |
| External Expansion Connection Diameter |
22 mm |
| Built-in Manometer |
Yes |
| Condensing |
Yes |
| Gas Certification HR |
Yes |
| Efficiency |
109.7% |
| 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 |
| Possible Operation as Open Version (Air Supply) |
Yes |
| Nominal Power 50-30 °C |
23.9 kW |
| Suitable for Propane |
Yes |
| Suitable for Butane |
No |
| Suitable for Methane |
No |
| Maximum Permissible Operating Pressure |
3 bar |
| Nominal Supply Diameter |
1" (25) |
| Nominal Return Diameter |
1" (25) |
| Nominal Fuel Diameter |
1/2" (15) |
| Hot Water Storage |
14 l |
| Conversion Kit Required |
Yes |
| Built-in Inlet Combination |
Yes |
| Expansion Connection |
Compression |
| CW Label |
4 |
| Gas Certification HR |
Yes |
| Gas Certification NZ |
No |
