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Master XL 91 Direct Diesel-fired Infrared Hot Air Generator

Master XL 91 Direct Diesel-fired Infrared Hot Air Generator
Safe shipment: box secured to wooden pallet
Max heat rating
43 kW
Body material
Enamelled steel
Starting mode
Standard cart
Manufacturing country
Free item: tarpaulin cover and storage
Free item: tarpaulin cover and storage
€ 1.930,58
VAT Included
Prompt Delivery
2 items in stock
Free Shipping
You should receive it by 07/07/2022
ID: K601498

EAN: 8053670892750

MPN: 4011.030

Master XL 91 Infrared

Master XL 91 direct diesel-fired infrared hot air generator

Infrared hot air generator with direct combustion system and solenoid diesel.

Compact and light-weight, the transportable Master XL 91 is ideal for heating outdoors and in well-ventilated areas.

Professional heater suitable for ensuring temporary or emergency heating of construction sites:

  • Heating of concrete
  • Pipe thawing
  • Machinery thawing

Equipped with pump with two separate injectors that can operate at 29 or 43 kW.

The hot air generators are equipped with safety devices for preventing the risk of overheating, an electronic flame control with photocell and anti-tilting sensors.

Master guarantees a 3-year warranty!

Intact and high performance even in outdoor weather conditions.

Designed to optimise fuel consumption and preventing the risk of burns while moving.

Adequate room ventilation is required to prevent oxygen starvation.

ZERO risk of burns while moving.

Stainless steel combustion chamber, ultra-resistant and safe.

Hot air generators are ideal for heating large spaces that are difficult to heat with traditional systems such as workshops, building sites, greenhouses, garages, livestock farms more.

Heating small and medium-sized rooms, open and windy spaces, workshops, warehouses, renovation and construction sites, tents and open and semi-open spaces.

Main features

  • Radiant heating
  • No air displacement
  • Highly silent
  • Electronic flame control with photocell
  • Post-ventilation system
  • Fuel quantity indicator
  • Sturdy and durable structure
  • Snorkel
  • Suction filter and inlet filter
  • Over-temperature thermostat
  • Anti-tilting sensor
  • Thermal motor protection
  • Possibility of operation with room thermostat
  • Stainless steel combustion chamber
  • Tank with level indicator
  • Made of sturdy and durable materials
  • Easy to transport
  • Steel structure with wall cold to the touch
  • Possibility of adjusting the heat direction (tiltable)


Focus on the controls

Focus on the handle

How to select the ideal hot air generator according to your needs

Important features that the operator has to consider in order to choose the ideal gas heater which best suits his requirements according to the room that has to be heated up:

  • Dimensions of the area that has to be heated up [V]
  • The ideal temperature [ΔT ] that has to be reached
  • Room thermal insulation [K]

High thermal insulation: k = 1

Medium levels thermal insulation: k = 2

Low levels thermal insulation: k = 3

No thermal insulation: k = 4

Therefore, the heat requirements can be also calculated by using the following formula:

V x ΔT x K [kcal/h]

For example:

V = width 4 m width, 12 m length, 3 m height, room volume = 144 m³

ΔT = outdoor temperature -5ºC, room required temperature +18ºC, room temperature = 23ºC

K = 4 not-insulated room

The formula above mentioned brings to the following result: 144 x 23 x 4 = 13 248 kcal / h, which has to be compared with the data written on the machine serial no. plate, which highlights this heater functionality being able to produce larger volumes of instant heat compared to that one needed.

Introduction to the Master XL 91 Direct Diesel-fired Infrared Hot Air Generator
Product Features
XL 91
Body material:
Enamelled steel
Operating mode:
Electric 230 V
Max heat rating:
43 kW
Heat rating kW:
Power Btu/h:
85.000 approx.
Power Kcal/h:
25.000 approx.
0.7 A
Tank capacity:
60 L
Temperature adjustment thermostat:
Fuel consumption:
2.7 kg/h
Starting mode:
Recommended for open areas:
Recommended for ventilated areas:
Suitable for closed areas:
Manufacturing country:
Thermal protected engine:
Overheat thermostat:
Post-ventilation thermostat:
Room thermostat integrated:
Adjustable heat:
Electronic control flame with photocell:
Possible connection to flexible tube:
Stainless steel combustion chamber:
Tank level indicator:
Standard cart:
Free gifts/extra features
Wooden pallet (safe shipping):
Diesel filter:
Instructions manual:
Dimensions and logistics
Product dimensions in cm (L x W x H):
71x97x99 cm
Net weight:
67 Kg
On pallet
Original packaging/s dimensions in cm (L x W x H):
101x75x117 cm
Gross weight (packaging included) :
89 Kg
Assembly time:

COMPLIMENTARY: Professional protection and storage cover XL

Ideal to protect your product when not in use.

This protection cover is fast and easy to apply; in just a few seconds your machine is protected from dust and humidity.

Easy to fold and store in its box, it takes up minimal space.

Free items included

The hot air generator is shipped in its original packaging.

The packaging includes:

  • Operation and maintenance instructions
  • Spare filter
  • Black handle to assemble