MASTER BV 77 indirect oil heater

20 kW
68.300 Btu/h
17.200 Kcal/h
Air displacement:
1.550 m³/h
Fuel consumption:
1,67 kg/h
Tank capacity:
36 l
Product size (l x w x h):
1130 x 380 x 660 mm
Power supply:
220-240/50 * V/Hz
Rated current:
1,5 A
Thermostat control:
Packaging dimension (l x w x h):
1200 x 400 x 530 mm
Electric power:
0,3 kW
Flue tube Ø:
120 mm
Blast opening Ø:
230 mm
Net / gross weight:
33 / 37 kg
Fuel autonomy:
19 h
8 pcs

* dual voltage available

Model description

Clean hot air
Possible connection to an optional room thermostat
Possible connection to a flexible tube
Flue gas exhaust
High air flow
Electric control panel humidity and dust proof
(Ingress Protection IP44)
Overheat thermostat
Three oil filters: oil pump filter, suction filter and inlet filter
Electronic flame control with photocell
Heat exchanger
Stainless steel combustion chamber
Oil tank with level indicator
Trolley included
Easy maintenance with external pump
Strong and long lasting construction
Diagnostic LED


Fuel pre-heater - 4100.827
Room thermostat TH 5 with cable
3 m - 4150.109, 10 m - 4150.112
range: 0-36°C, accuracy: ± 1,5°C
Digital thermostat THD with 5 m cable
IP 55 - 4150.106, for heaters made in Oct 2015 or later
Adaptor ring kit, Ø 294 mm
Flexible coated tube, Ø 305 mm
3 m - 4515.550, 7,6 m - 4515.553
Require the use of coupling set.
In 7,6 m hoses first 2m (black part) are made of a material resistant 150°C. Hose binder included.

Flexible tubes white, Ø 305 mm
7,6 m - 4515.588
Diffuser Ø 300 mm - 4517.744
Rain cover - 4514.652

How it works

Combustion system - air flow


Ventilation of the room
is neccessary to prevent
a deficiency in oxygen supply.

Where to use

warehouses workshopsbuilding applications greenhouses animal housing