Verified quality of products-attack-EN

30 years of tradition

Buffer tanks AK, AS

suitable for wood boilers

Category:

100 mm
Insulation layer

Solar
Connection to solar panel

5000 L
Tank sizes from 204 – 5000 L

Robotic
Welded with high precision

ATTACK AK is a basic type of buffer tank that accumulates excess energy from the heating element and subsequently uses it later according to your needs. The AK tank is used only for the accumulation of heating water. Compared to the basic clean AK tank, the ATTACK AS accumulation tank model is equipped with one heat exchanger, which you can easily connect to a solar system.

slx scene with accumulation tank

We produce both types of buffer tanks, AK and AS, with a wide choice of cylinder volumes from 204 to 4,940 liters. The buffer tank is robotically welded, which extends its service life. It increases the performance and efficiency of the boiler. At full power and optimal efficiency, you consume less fuel, making heating more ecological. Another advantage is the minimal amount of tar and acids during combustion and consequently a long service life of the boiler and chimney.

ATTACK AK

Accumulation tank attack akas en-2026

ATTACK AS

Standard buffer tank and heating methods

The buffer tank can be combined with various heating methods (accumulation electricity, solar devices, or heat pumps); a combination with radiators and underfloor heating is of course also possible.

Accumulation-tank @ zapojenie-kotly-en

Thermal insulation

So that your buffer tank preserves heat better. Every standard ATTACK AK and AS buffer tank comes with a soft removable insulation layer included in the price of the tank. 100 mm thick insulation made of polyester fibers with a leatherette cover is attached to the tank after installation, and the insulation takes care of the rest.

At full power and optimal efficiency, you consume less fuel

The advantage of connecting a boiler with an buffer tank is its operation at rated power, achieving a minimal amount of tar and acids during combustion and consequently a long service life of the boiler and chimney.

Technical data and documents for download

The AK, AS buffer tank with its properties can effectively help a biomass boiler improve performance and extend service life. Find out more about other technical data.

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  • Thick insulation 100mm
  • Possibility of connection with a solar system
  • Extends the service life of the boiler and chimney
  • Increases boiler performance and efficiency
  • Cylinder volumes from 204 to 4,940 L
  • Robotically welded

Standard accumulation tank ATTACK AK

Type AK200K AK300K AK400K AK500K AK800K AK1000K AK1500K AK2000K AK2500K AK3000K AK4000K AK5000K
Position 1–5 925 1 110 1 120 1 405 1 545 1 735 1 755 1 955 2 005 2 205 2 385 2 285
Position 2–6 705 790 815 1 013 1 135 1 255 1 345 1 409 1 465 1 600 1 730 1 680
Position 3–7 455 460 515 621 725 775 820 862 915 985 1 065 1 065
Position 4–8 205 210 210 230 315 295 375 315 375 375 405 455
L – max. length of the electric heating body
550 600 700 700 840 840 1 050 1 150 1 250 1 300 1 450 1 650
∅ D1 – Diameter without insulation
500 550 650 650 790 790 1 000 1 100 1 200 1 250 1 400 1 600
∅ D2 – Diameter with insulation of 100 mm
700 750 850 850 990 990 1 200 1 300 1 400 1 450 1 600 1 800
Height 1 140 1 350 1 380 1 660 1 840 2 030 2 095 2 310 2 387 2 596 2 819 2 770
Height with insulation of 100 mm 1 190 1 400 1 430 1 710 1 890 2 080 2 145 2 360 2 437 2 646 2 869 2 820
R – lope dimension without insulation
1 157 1 368 1 402 1 678 1 864 2 052 2 142 2 353 2 438 2 643 2 872 2 845
Max. operating pressure (bar) 3 3 3 3 3 3 3 3 3 3 3 3
Max. operating temperature ( °C) 95 95 95 95 95 95 95 95 95 95 95 95
Volume (l) 204 289 405 488 732 915 1 449 1 980 2 435 2 915 3 819 4 940
Weight (kg) 46 60 73 81 109 118 201 235 271 363 475 578

Standard accumulation tank with an exchanger ATTACK AS

Tank Type AS500K AS800K AS1000K AS1500K
Position 1–5 1 405 1 545 1 735 1 755
Position 2–6 1 013 1 135 1 255 1 345
Position 3–7 621 725 775 820
Position 4–8 230 315 295 375
Position RS 230 315 295 375
Position AS 710 725 860 895
L – max. length of the electric heating body 700 840 840 1 050
∅ D1 – Diameter without insulation
650 790 790 1 000
∅ D2 – Diameter with insulation of 100 mm
850 990 990 1 200
Height 1 660 1 840 2 030 2 095
Height with insulation of 100 mm 1 710 1 890 2 080 2 145
R – Slope dimension without insulation
1 678 1 864 2 052 2 142
Max. operating pressure (bar) 3 3 3 3
Max. operating temperature ( °C) 95 95 95 95
Solar exchanger Area of exchanger (m²) 1,8 2,4 3 3,6
Volume of exchanger (l) 11,9 15,9 19,8 23,7
Max. operating pressure (bar) 10 10 10 10
Tank Volume (l) 474 713 891 1 420
Weight (kg) 118 157 172 265

High-quality processing

All our products are manufactured with an emphasis on the selection of quality materials and the use of correct technologies and procedures. A robotically welded tank ensures maximum product reliability. Our own know-how is a guarantee of reliable service and long life.

storage-tank-attack-quality-production of boilers and tanks-2026-en
Accumulation tank ak,as diagram -en

Standard buffer tank ATTACK AK, AS

LEGEND

1 – Riser boiler – 1 ½“
2 – Freely available – 1 ½“
3 – Freely available – 1 ½“
4 – Return heating circuit – 1 ½“
5 – Riser heating circuit (radiators) – 1 ½“
6 – Riser heating circuit (floor) – 1 ½“
7 – Return gas, oil, and pellet boiler – 1 ½“
8 – Return wood boiler – 1 ½“
9 – Solar system or heating sensor – ½“
AS – Riser solar system – 1″
RS – Return solar system – 1″
D1 – Diameter without insulation
D2 – Diameter with insulation

Choose a service partner for installation

Creating a high-quality and prompt service network for our customers is very important to us. Our service partners provide prompt service assistance to every customer throughout the year.

We have a rich service network covering the entire territory of the world

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