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Warranty 8 years Werstahl AT20 (20,000 kcal - 23 kW) Compact oil heating unit with an Italian ELCO burner
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Compact oil heating unit

Werstahl AT20Code: AT20

Boiler, Italian ELCO burner, circulator, expansion vessel and control panel in one unit.

Maximum output
23kW
Efficiency
90%
Water capacity
16lt
Fuels
Oil
Werstahl AT models
1,080.00 €incl. VAT
In stock · delivery or pick-up in Patras
Request a quote with installation
  • Delivery across GreeceBy freight because of its weight (116kg). The cost is shown at checkout, once you enter an address.
  • Pick-up in Patras171 Ag. Ioanni Pratsika St · Mon–Fri 08:30–17:00, Sat 09:00–14:00
  • Installation by a partnerPartner installers across Greece.
  • 8 years warranty from ClimaventisSpare parts and service directly from us.

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Description

Boiler and burner, together in one unit.

The Werstahl AT is a compact oil heating unit made in Greece. The boiler is steel, with cast-iron baffles in the three flue gas passes, and efficiency is 90%.

The Italian ELCO oil burner, the circulator, the expansion vessel, the safety valves and the control panel are all built into the unit. Working pressure 2.5 bar, maximum water temperature 95°C.

ELCO burnerAn Italian oil burner, built in.
Steel and cast ironCast-iron baffles, three passes.
90% efficiencyAcross the whole series.
All in one unitCirculator, expansion vessel and safety valves inside the unit.
Control panelBuilt in.
Compare the models

Three sizes: 20,000, 30,000 and 40,000 kcal.

All models have an ELCO burner, 90% efficiency, 2.5 bar working pressure and 1" connections. Choose the size by the space you heat and, ideally, a heat loss study.

Compare the models AT201,080.00 €This modelAT301,140.00 €AT401,210.00 €
Maximum output23kw35kw46kw
Water capacity16lt20lt24lt
Expansion Vessel8lt12lt18lt
Circulator power60W80W80W
Dimensions (W x H x D) cm47.5 x 88 x 79cm47.5 x 88 x 79cm47.5 x 93 x 82cm
Net weight116kg146kg164kg
Flue diameter108mm108mm128mm
Efficiency90%90%90%

Prices include VAT.

Technical specifications

All the numbers, in one table.

Heating
Burner power90W
Circulator power60W
Connections1"
Dimensions (W x H x D) cm47.5 x 88 x 79cm
Efficiency90%
Electric Current of Circulator220 V
Expansion Vessel8lt
Flue diameter108mm
FuelOil
Max. water temperature95°C
Maximum output23kw (20,000kcal)
Minimum flue gas temperature65°C
Net weight116kg
Test pressure4 bar
Warranty8 years
Water capacity16lt
Working pressure2.5 bar
Ranges
Approximate heating space in m²51-100m²
Nominal Power (kw)20-25kw
Warranty & installation

We are here after you buy.

Installation

By a partner in your area

A partner installer does the site visit, the connection and the first start-up. Ask for a quote together with the product.

Contact us →
Heating study

Sure about the size?

Our engineers calculate your home's heat loss and confirm the choice. The first assessment is free.

Contact us →

Before installing

  • FlueFlue connection 108mm. The installer checks it before connecting.
  • Power supplyThe circulator (60W, 220 V) and the burner (90W) need power.
  • PlumbingConnections 1" · unit water content 16lt · expansion vessel 8lt · working pressure 2.5 bar, test pressure 4 bar.
  • SpaceDimensions 47.5 x 88 x 79cm (W × H × D), net weight 116kg.
  • SizeChoosing the right size needs a heat loss study.
Questions

Ask us before you buy.

Our technicians answer every question, from choosing to installing.

2610 334 389 info@climaventis.gr
What is a compact heating unit?

An oil boiler with the basics of the installation built in: ELCO burner, circulator, expansion vessel, safety valves and control panel.

Which size do I need?

The models are 20,000 kcal (23 kW), 30,000 kcal (35 kW) and 40,000 kcal (46 kW). The right choice depends on the space, the insulation and the climate, so a heat loss study is needed. Call us and we will help.

Which burner does it have?

An Italian ELCO oil burner, built into the unit.

What does installation need?

A 108 mm flue (AT20, AT30) or 128 mm (AT40), a power supply and the connection to the radiators. The circulator and the expansion vessel are already in the unit. An installer makes the connection.

What warranty does it have?

8 years. Ask us for the warranty terms.

How are delivery and installation done?

Collect it from our shop in Patras, or we send it by carrier. The shipping cost shows in the cart; if it does not show for your area or size, call us for the delivery cost. A heating installer fits it; we can suggest a partner in your area.

Complete the installation

Werstahl unit, Mastersol cylinder.

With a Mastersol hot water cylinder, your hot water is heated by the boiler while the heating runs. The triple-energy ones connect to a solar system as well.

Related products

See also