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BOILER

SEMAX OPTI

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General information

Technical data

Dimensions

Documentation

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Available powers: 23kW | 30kW | 40kW
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Fuel: Firewood
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Certificates: EcoDesign | 5th class
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Energy class: A +

General information

SEMAX OPTI boiler, Combination of economy with convenience!

The SEMAX OPTI boiler is an ideal solution dedicated to people who have a large supply of properly stored firewood – rake logs (logs) with a moisture content of Wc = 15-20%. The operation of our device at nominal power allows for better use of fuel, and, as a result, also cleaner exhaust fumes into the atmosphere. Additionally, the boiler can be equipped with automatics regulating combustion and operation of the device. For the proper operation of the entire system, the boiler must be connected to a buffer collecting excess heat.

Technology and security

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Heat exchanger

Horizontal convection channels | regimental
Efficient design for quick cleaning of the exchanger from the front. The design of the boiler exchanger ensures high heat removal from the furnace.
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Flue outlet

At the back of the boiler
The structure of the boiler has been designed in such a way that the flue outlet is at the rear. The use of such a solution in a central heating boiler allows the flue to be directly led out to the chimney.
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Buffer tank

Accessories

Thanks to the combination of a buffer tank and a boiler with manual charging, we stabilize its working conditions. The device is not regulated, and thus always works at full power. The excess of generated heat is stored in the buffer. The heating system of the house takes as much heat from the buffer as it needs at the moment.

ATTENTION!
Central heating boiler can only be installed in the heating system together with a buffer cylinder. The tank is not included in the price of the boiler.

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Exhaust fan

Adjustable height
The exhaust fan effectively supports the natural flue gas draft in the boiler.
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Secondary air intake

Air is sucked in through six holes to fully burn the fuel. The amount of air can be adjusted.
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Smoke exhaust hatch

It allows for effective smoke extraction from the furnace chamber, depending on the user’s needs.

Connectivity and functionality

Simple and intuitive boiler control

The TECH ST-880 controller with PID is programmed to automate all processes related to home heating. Your role is only to enter the temperature you want in the room, and the controller will optimize combustion in this respect. Entering the advanced settings of the controller, you will be able to personalize many parameters related to combustion in the boiler, depending on your preferences!

Extraction kit:

(TECH ST-880 controller with PID + Exhaust fan)

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Pump: C.O.1; Domestic hot water; additional
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One CH.1 mixing circuit with room thermostat
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Fan
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Additional equipment

  • TECH ST280 room thermostat (touchscreen, wired)
  • Room thermostat TECH ST280 + ST260 (touchscreen, wireless)

Manual firing up

Manual ignition and fuel loading

Firewood – hornbeam logs (logs) with a moisture content of Wc = 15-20%. Properly seasoned wood is an ecological fuel that meets all standards. It is completely natural, as a result of combustion, biodegradable ash is produced. By burning properly seasoned wood, we produce a small amount of harmful compounds into the atmosphere.

Technical data of the boiler

PARAMETERS S.I. UNIT SEMAX OPTI 23
Nominal heat output[kW]23
Range of boiler power[kW]23
Area that can be heated *[m2]230-345
Heating area[m2]2.8
Water capacity[L]97
Maximum working pressure[bar]3
Maximum operating temperature[°C]80
Test pressure[bar]4.5
Perimeter of the clearings (strain)[cm]30-40
Log length (strain)[cm]26
Fuel[-]Firewood
Electrical connection[-]1A; ~ 230V; 50Hz
Electric power consumption[W]70
Temperature controller setting range[°C]60-80 (1°C steps)
Chimney draft required[Pa]23
Boiler weight[kg]414

* A new building with very good thermal insulation was adopted for the calculations.

PARAMETERS S.I. UNIT SEMAX OPTI 30
Nominal heat output[kW]30
Range of boiler power[kW]30
Area that can be heated *[m2]300-450
Heating area[m2]3.5
Water capacity[L]120
Maximum working pressure[bar]3
Maximum operating temperature[°C]80
Test pressure[bar]4.5
Perimeter of the clearings (strain)[cm]30-40
Log length (strain)[cm]31
Fuel[-]Firewood
Electrical connection[-]1A; ~ 230V; 50Hz
Electric power consumption[W]70
Temperature controller setting range[°C]60-80 (1°C steps)
Chimney draft required[Pa]35
Boiler weight[kg]477

* A new building with very good thermal insulation was adopted for the calculations.

PARAMETERS S.I. UNIT SEMAX OPTI 40
Nominal heat output[kW]40
Range of boiler power[kW]40
Area that can be heated *[m2]400-600
Heating area[m2]4.1
Water capacity[L]170
Maximum working pressure[bar]3
Maximum operating temperature[°C]80
Test pressure[bar]4.5
Perimeter of the clearings (strain)[cm]30-40
Log length (strain)[cm]41
Fuel[-]Firewood
Electrical connection[-]1A; ~ 230V; 50Hz
Electric power consumption[W]70
Temperature controller setting range[°C]60-80 (1°C steps)
Chimney draft required[Pa]35
Boiler weight[kg]569

* A new building with very good thermal insulation was adopted for the calculations.

CERTIFICATES, CLASS, BOILER EMISSION

PARAMETERS S.I. UNIT SEMAX OPTI 23
Ecodesign[-]yes
Boiler class[-]5
Energy class[-]A +
Particulate emission[mg / m3]31
PARAMETERS S.I. UNIT SEMAX OPTI 30
Ecodesign[-]yes
Boiler class[-]5
Energy class[-]A +
Particulate emission[mg / m3]14
PARAMETERS S.I. UNIT SEMAX OPTI 40
Ecodesign [-] yes
Boiler class [-] 5
Energy class [-] A +
Particulate emission [mg / m3] 33

Boiler dimensions

DIMENSION S.I. UNIT SEMAX OPTI 23
A[mm]490
B1[mm]
B2[mm]
C1[mm]1560
C2[mm]1530
D1[mm]1135
D2[mm]776
E[mm]
F1[mm]
F2[mm]765
F3[mm]626
F4[mm]82
G1[mm]
G2[cal]1 1/2
G3[cal]1 1/2
G4[cal]3/4
H[mm]30
DIMENSION S.I. UNIT SEMAX OPTI 30
A[mm]540
B1[mm]
B2[mm]
C1[mm]1620
C2[mm]1635
D1[mm]1155
D2[mm]796
E[mm]
F1[mm]
F2[mm]805
F3[mm]646
F4[mm]82
G1[mm]
G2[cal]1 1/2
G3[cal]1 1/2
G4[cal]3/4
H[mm]30
DIMENSION S.I. UNIT SEMAX OPTI 40
A[mm]640
B1[mm]
B2[mm]
C1[mm]1620
C2[mm]1635
D1[mm]1155
D2[mm]796
E[mm]
F1[mm]
F2[mm]805
F3[mm]646
F4[mm]82
G1[mm]
G2[cal]1 1/2
G3[cal]1 1/2
G4[cal]3/4
H[mm]30

Boiler documentation

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DTR statement

Technical and operational documentation for the SEMAX OPTI boiler

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Driver manual

TECH ST-880 controller manual with PID

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Energy label

A + energy class

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Product sheet

According to EU Regulation 2015/1187 supplementing Directive 2009/125 / EC of the European Parliament and of the Council

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EcoDesign certificate

The boiler complies with the requirements of the EcoDesign standard

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Class 5 Certificate

The boiler complies with the requirements of PN-EN 303-5: 2012

Contact us

Contact form

Type of fuel

Consent required

10 + 13 =

Paweł Czepiel

Export manager
Language: Russian, English
Phone. +48 85 711 94 54 ext. 17
Mobile: +48 663 45 32 22
E-mail: p.czepiel@metalfach.com.pl
Monday-Friday (from 7:00 a.m. to 3:00 p.m.)

Metal-fach Jacek Kucharewicz reserves the right to introduce changes to the technical parameters, equipment and specifications of the offered goods without prior notice. The information contained does not constitute an assurance within the meaning of Art. 4 sec. 3 and 4 of the Act of 27.07.2002. on the specific conditions of consumer sale and on the amendment to the Civil Code (hereinafter the “Act”), and do not constitute a description of the goods within the meaning of Art. 4 sec. 2 of the Act. The guide does not constitute an offer within the meaning of Art. 66 of the Civil Code.

General contact:

Opening hours:

  • Monday-Friday (7:00 a.m. – 3:00 p.m.)
  • Phone: +48 85 711 94 54 int. 17
  • E-mail: p.czepiel@metalfach.com.pl

Social Media:

Service contact:

Opening hours:

  • Monday-Friday (7:00 a.m. – 3:00 p.m.)
  • Phone: +48 85 711 94 54 int. 17
  • E-mail: p.czepiel@metalfach.com.pl

Address data:

METAL-FACH Jacek Kucharewicz

  • 16-100 Sokółka st. Sikorskiego 66
  • NIP: 545-100-10-62
  • REGON: 050073833

How to get: