Oil-Fired Unit Heaters

The Sterling HVAC QVOF Series of oil-fired unit heaters are designed to operate on number 1 & 2 fuel oils. Available in 7 sizes, ranging from 70–560 MBH (.50–4.00 GPH), all units are factory assembled and arrive ready to install.

All QVOF SERIES Literature

Standard Features

70-560 MBH (20.51-164.12 kW)
Fuel Type(s): No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)
Heavy Duty 18-Gauge Heat Exchanger
Energy Efficient Flame Retention Beckett® Burner
Adjustable Discharge Air Louvers
Fan/Limit Control
Four Point Suspension
CAD Cell Burner Safeguard Control
115/1/60

Specifications

Sterling Oil-Fired Unit Heaters are the vented type intended for space heating and designed for ceiling suspension.

Heaters are equipped with a 3450RPM flame-retention oil burner of the pressure-atomizing type, using high-tension electric ignition. Operation excels that of conventional gun-type burners. Employing Group I or II safety combustion controls and oil pressures not greater than approximately 100 psi, the burner operates with fuels no heavier than
Commercial grade No. 2.

Clearance

Clearances between a unit and combustible construction should be at least 6" at sides, 6" at top and 18" from the smoke pipe in any direction. For installation of draft regulation, allow 18" between unit top and ceiling, 24" from burner.

Literature

All the Literature associated with the QVOF SERIES

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Literature Library

Performance

Performance, Materials and Features for each QVOF SERIES capacity model.

Name	70	105	126	231	312	375	560
Input	70 MBH (20.51 kW)	105 MBH (30.77 kW)	126 MBH (36.93 kW)	231 MBH (67.7 kW)	312 MBH (91.44 kW)	375 MBH (109.9 kW)	560 MBH (164.12 kW)
Output	56 MBH (16.41 kW)	84 MBH (24.62 kW)	100 MBH (29.31 kW)	184 MBH (53.93 kW)	250 MBH (73.27 kW)	300 MBH (87.92 kW)	450 MBH (131.88 kW)
Free Air Delivery CFM	1,050 CFM	1,750 CFM	2,000 CFM	3,200 CFM	3,400 CFM	5,000 CFM	6,000 CFM
Motors
Motor HP	1/4	1/4	1/4	1/4	1/2	1/2	1/3
Motor Count	1 Motor(s)	1 Motor(s)	1 Motor(s)	1 Motor(s)	1 Motor(s)	1 Motor(s)	2 Motor(s)
Venting
Flue Size	7"	7"	7"	8"	9"	9"	10"
Fuel
Fuel Type(s)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)	No. 1 Fuel Oil (Kerosene), No. 2 Fuel Oil (Heating Oil/Diesel)