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Apen LKN

Condensing Warm Air Unit Heater

The Apen LKN is a condensing gas warm air unit heater delivering efficiencies of up to 108% with outputs from 19 kW to 100 kW. Featuring a premix burner with continuous microprocessor-controlled modulation, very low NOx emissions, and flexible flue options, it provides high-efficiency heating that exceeds ErP 2021 requirements.

KEY FEATURES

Hadar Energy Savings

Up to 108% efficiency

Hadar Heat Outputs

19kW to 100kW output

Hadar Intelligent Automation

Microprocessor controlled modulation

Hadar Garden Centres

Very low NOx emissions

Hadar Honest Advice

Proven premix burner technology

Hadar simple installation

Flexible rear or top flue exit

PRODUCT OVERVIEW

Condensing Efficiency up to 108%

The Apen LKN is a condensing gas warm air unit heater designed with advanced technology to provide very high efficiency. Achieving efficiency levels of up to 108%, it maximises energy use and minimises waste, translating directly into significant energy savings and lower operating costs compared to non-condensing alternatives.

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With outputs from 19 kW to 100 kW (full fire), the LKN caters to different heating needs and space sizes, from smaller commercial units to larger industrial areas. The unit exceeds the requirements of the Energy-related Products Directive (ErP) 2021, meeting stringent energy efficiency and emission standards.

 

Each unit features a proven premix burner with continuous microprocessor-controlled modulation, ensuring consistent and efficient heat delivery. The modulating capability adjusts output to match demand precisely, avoiding the energy waste of fixed on/off cycling.

Apen LKN Condensing Warm Air Unit Heater

INSTALLATION & CONTROLS

Flexible Flue Options & Smart Controls

Apen LKN Condensing Warm Air Unit Heater

The Apen LKN offers flexible installation with standard rear flue and combustion air connections that can be relocated to the top panel if required. This adaptability accommodates various installation constraints and building layouts.

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  • Outputs from 19 kW to 100 kW (full fire) to suit various building sizes and heating demands

  • Condensing efficiency up to 108%, maximising energy use and minimising waste

  • Premix burner with continuous microprocessor-controlled modulation for consistent, efficient heat delivery

  • Very low NOx emissions for reduced environmental impact and improved air quality

  • Standard rear flue and combustion air connections, relocatable to the top panel for installation flexibility

  • User-friendly LED display clearly indicates heater status for easy monitoring and maintenance

  • Smart Easy and Smart Web controls available for intelligent system management

KEY BENEFITS

Why Choose the Apen LKN?

The LKN combines condensing efficiency, modulating premix burner technology, and flexible installation in a compact unit heater that delivers maximum heat from minimum gas.

Hadar Energy Savings

Up to 108% Efficiency

Fully condensing operation extracts maximum heat from every unit of gas consumed, delivering efficiencies of up to 108%. This translates directly into significant energy savings and lower gas bills compared to non-condensing alternatives. 

Hadar Heat Outputs

19kW to 100kW Output

A range of outputs from 19 kW to 100 kW (full fire) caters to different heating needs and space sizes. From smaller commercial spaces to larger industrial areas, there is an LKN model to match your requirements.

Hadar Intelligent Automation

Microprocessor-Controlled Modulation

The proven premix burner features continuous microprocessor-controlled modulation that adjusts output to match demand precisely. This avoids the energy waste of fixed on/off cycling and ensures consistent, efficient heat delivery.

Hadar Garden Centre Heating

Very Low NOx Emissions

Designed to produce very low nitrogen oxide (NOx) emissions, contributing to reduced environmental impact and improved indoor air quality. Meets and exceeds current emission standards for responsible, sustainable heating.

Hadar Honest Advice

Proven Premix Burner Technology

A proven premix burner delivers reliable, consistent combustion for efficient heat output. Combined with continuous microprocessor-controlled modulation, it adjusts output to match demand precisely for dependable performance day after day.

Hadar simple installation

Flexible Rear or Top Flue Exit

Standard rear flue and combustion air connections can be relocated to the top panel if required. This flexibility accommodates various installation constraints and building layouts, simplifying installation in tight spaces.

APPLICATIONS

Ideal For These Environments

The Apen LKN is designed for commercial and industrial buildings that need high-efficiency condensing warm air heating with low emissions and low running costs.

Hadar Warehouses Heating

Warehouses

Large storage & distribution spaces

Hadar Factory heating

Factories

Production floors & manufacturing

Hadar Transport Workshop heating

Workshops

Vehicle & industrial workshops

Hadar Sports Hall heating

Sports Halls

Gyms, leisure centres, & arenas

Hadar Retail Unit heating

Retail & Showrooms

Large display & commercial spaces

Hadar Garden Centre heating

Garden Centres

Open-plan retail & growing spaces

TECHNICAL DATA

Specifications

Model

Apen LKN

Burner

Premix

Type

Condensing Gas-Fired Unit Heater

Compliance

Exceeds ErP 2021

Output Range

19kW to 100kW

Flue

Rear (Relocate to Top Panel)

Efficiency

Up to 108%

Display

LED Status Indicator

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Apen LRN

Apen LRN Warm Air Unit Heater

Gas-fired warm air unit heater. A cost-effective non-condensing alternative where maximum efficiency is not the priority. 

Hadar DSF

Hadar DSF Destrat Fan

Pair with the LKN for a high-efficiency heating solution. Recirculates warm air from ceiling level back to the occupied zone. 

Need High-Efficiency Condensing Heating?

Book a free site survey and our team will assess your building, calculate the heating load, and recommend the right Apen LKN model and output for maximum efficiency and minimum running costs.

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