LNA burner is the only low NOx emission burner ready to comply with the last step of the ErP Directive.

The horizontal modular shape of this low NOx burner enables to be easily adapted to all inputs range of IGWH and WHB.

Here some technical features:

low polluting emissions:

CO < 100 ppm corrected to 0% O2

NOx < 56 mg/kWh (ErP Directive)

compact in size

robustness

nominal heat input up to 2,2 kW/ blade

high flame modulation

one solution for IGWH and WHB

gas and water quick connection

suitable for natural draft appliances (type B) or forced draft (type C), conventional and Half Condensing

working with gases of the 2nd and 3rd family

water-cooled

hyperstoichiometric combustion

Premix burners covered with metal fibre mesh are tried and proven products for premixed combustion.

The fibre covering guarantees efficient thermal protection for the steel base. This prevents thermal deformations and breaking of the burner, thus upping reliability and lifetime of the component and extending its field of use.

Metal fibre is generally employed in large sized, highly performing burners for high modulations, in which the component is subject to greater thermal stress.

For low thermal loads, combustion occurs on the surface and the metal mesh works in radiant mode.

The fibre burners guarantee excellent flame stability across the entire power range, while observing

the strictest European standards of NOx and CO emissions.

POLIDORO employs a three-dimensional metal mesh structure. The material used for the fibre is a high heat resistant alloy, Fe-Cr-Al, in order to guarantee a long lifetime and high resistance to high temperature corrosion.

The metal mesh was developed to meet the following needs:

correct combustion

noisiness

dimensional stability

no flashback

flame stability at high λ values

Output powers ranging from 100 kW/m2 to 2000 kW/m2

High modulations of up to 1:10

NP burners have been specially designed for application in wall-hung boilers and water heaters in categories B and C that run with any type of combustible gas.

In any event, their flexibility of use allows application on special devices or more in general, wherever it is necessary to use a source of heat powered by gas (for example, coffee roaster, etc.)

The main operating characteristics guarantee:

low emissions in compliance with the current European regulations

low noise levels, compliant to the strictest European standards

efficiency according to 3-star standard for traditional boilers, both open-chamber and sealed chamber

efficiency according to 4-star standard for condensing boilers with recuperator

operation without the need to calibrate the gas valves where smart combustion systems are involved

function on gases of the first, second and third families by changing the injectors, without any air regulation system

This specific construction system allows for the creation of burners:

easily adaptable to any heat exchanger

with different widths, varying the number of elements from a minimum of 5 to a maximum of 20

with different depths, using burner bodies L=157mm or L=140mm

The NP burner is compatible with:

electronic ignition systems, either mono or multiple electrode, that may be positioned either on the plate or on the spacer

ignition system with pilot, that may be positioned either on the plate or on the spacer

NP burners are always equipped with a gas manifold, which may be:

assembled directly on the burner

provided as an accessory

The gas manifold is set up for:

connection to the gas valve with male or female connections, ½” Gas or ¾”Gas thread or quick connections

brackets for positioning the burner in the boiler

Reliable, solid, compact and high-performance. Our heat exchangers are suitable for a wide variety of applications.

Our range consists of different sizes of single-circuit heat exchangers with PED approval (where applicable). Keeping the external dimensions unchanged, each format can give rise to different variants:

• DM-Water-Water: designed to work at low operating pressure, up to 24 bars. Suitable for district heating and hot water supply.
• DBE-Evaporator: designed to work at an operating pressure of max 49 bars. Suitable for use in high pressure systems like heat pumps and chillers.
• DBC-Condenser: designed to work for the most demanding application, up to 49 bars of operating pressure. Suitable for use as condensers for refrigeration systems and heat pumps.
• DS-Steam-Water: used to transfer large outputs for industrial use (electricity generation, machine drive) or just for heating.

They are made of a defined number of corrugated stainless-steel plates (AISI 316L/304), bonded using thin copper sheets (Cu 99,9%) and brazed in a special vacuum oven. Thanks to this brazing process, heat exchangers are hermetically sealed without using any gasket. This ensures an optimal heat transfer efficiency and pressure resistance.

Our selection software has an immediate and user-friendly interface, through which users can obtain the optimal sizing of the heat exchanger according to the project.

LNA burner is the only low NOx emission burner ready to comply with the last step of the ErP Directive.

The horizontal modular shape of this low NOx burner enables to be easily adapted to all inputs range of IGWH and WHB.

Here some technical features:

low polluting emissions:

CO < 100 ppm corrected to 0% O2

NOx < 56 mg/kWh (ErP Directive)

compact in size

robustness

nominal heat input up to 2,2 kW/ blade

high flame modulation

one solution for IGWH and WHB

gas and water quick connection

suitable for natural draft appliances (type B) or forced draft (type C), conventional and Half Condensing

working with gases of the 2nd and 3rd family

water-cooled

hyperstoichiometric combustion

Premix burners covered with metal fibre mesh are tried and proven products for premixed combustion.

The fibre covering guarantees efficient thermal protection for the steel base. This prevents thermal deformations and breaking of the burner, thus upping reliability and lifetime of the component and extending its field of use.

Metal fibre is generally employed in large sized, highly performing burners for high modulations, in which the component is subject to greater thermal stress.

For low thermal loads, combustion occurs on the surface and the metal mesh works in radiant mode.

The fibre burners guarantee excellent flame stability across the entire power range, while observing

the strictest European standards of NOx and CO emissions.

POLIDORO employs a three-dimensional metal mesh structure. The material used for the fibre is a high heat resistant alloy, Fe-Cr-Al, in order to guarantee a long lifetime and high resistance to high temperature corrosion.

The metal mesh was developed to meet the following needs:

correct combustion

noisiness

dimensional stability

no flashback

flame stability at high λ values

Output powers ranging from 100 kW/m2 to 2000 kW/m2

High modulations of up to 1:10

NP burners have been specially designed for application in wall-hung boilers and water heaters in categories B and C that run with any type of combustible gas.

In any event, their flexibility of use allows application on special devices or more in general, wherever it is necessary to use a source of heat powered by gas (for example, coffee roaster, etc.)

The main operating characteristics guarantee:

low emissions in compliance with the current European regulations

low noise levels, compliant to the strictest European standards

efficiency according to 3-star standard for traditional boilers, both open-chamber and sealed chamber

efficiency according to 4-star standard for condensing boilers with recuperator

operation without the need to calibrate the gas valves where smart combustion systems are involved

function on gases of the first, second and third families by changing the injectors, without any air regulation system

This specific construction system allows for the creation of burners:

easily adaptable to any heat exchanger

with different widths, varying the number of elements from a minimum of 5 to a maximum of 20

with different depths, using burner bodies L=157mm or L=140mm

The NP burner is compatible with:

electronic ignition systems, either mono or multiple electrode, that may be positioned either on the plate or on the spacer

ignition system with pilot, that may be positioned either on the plate or on the spacer

NP burners are always equipped with a gas manifold, which may be:

assembled directly on the burner

provided as an accessory

The gas manifold is set up for:

connection to the gas valve with male or female connections, ½” Gas or ¾”Gas thread or quick connections

brackets for positioning the burner in the boiler