Radiant Tube Gas and Flue sizes

Information about Reznor's range of flue
The following are the flue sizes for Reznor Radiant units.

VISION U TUBE RADIANT TUBE (VS UTE) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
VS 15 UTEN 1/2" 1 1 4.5m 125mm TWIN WALL FLUE X 1
VS 25 UTEN 1/2" 1 1 5.1m 125mm TWIN WALL FLUE X 1
VS 35 UTEN 1/2" 1 1 7.6m 125mm TWIN WALL FLUE X 1
VS 40 UTEN 1/2" 4 4 8.5m 125mm TWIN WALL FLUE X 1
VS 45 UTEN 1/2" 4 4 9.4m 125mm TWIN WALL FLUE X 1
VS 50 UTEN 1/2" 4 4 9.4m 125mm TWIN WALL FLUE X 1

VISION STANDARD SINGLE LENGTH RADIANT TUBE (VS LIE - STANDARD) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
VS 15 LIEN8 1/2" 1 1 8.0m 125mm TWIN WALL FLUE X 1
VS 25 LIEN8 1/2" 1 1 8.0m 125mm TWIN WALL FLUE X 1
VS 35 LIEN10-5 1/2" 1 4 10.5m 125mm TWIN WALL FLUE X 1
VS 40 LIEN13-5 1/2" 1 4 13.5m 125mm TWIN WALL FLUE X 1
VS45 LIEN13-5 1/2" 1 4 13.5m 125mm TWIN WALL FLUE X 1
VS 50 LIEN13-5 1/2" 4 4 13.5m 125mm TWIN WALL FLUE X 1

VISION EXTENDED SINGLE LENGTH RADIANT TUBE (VS LIE - EXTENDED) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
VS 25 LIEN10.5 1/2" 1 1 8.0m 125mm TWIN WALL FLUE X 1
VS 35 LIEN13-5 1/2" 1 1 8.0m 125mm TWIN WALL FLUE X 1
VS 40 LIEN16 1/2" 1 4 10.5m 125mm TWIN WALL FLUE X 1
VS45 LIEN16 1/2" 1 4 10.5m 125mm TWIN WALL FLUE X 1
VS 50 LIEN16 1/2" 1 4 13.5m 125mm TWIN WALL FLUE X 1

VISION DOUBLE LENGTH STANDARD RADIANT TUBE (VS DLE - STANDARD) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
VS 15 DLEN16 1/2" 4 4 16.0m 125mm TWIN WALL FLUE X 2
VS 25 DLEN16 1/2" 4 4 16.0m 125mm TWIN WALL FLUE X 2
VS 35 DLEN21 1/2" 4 4 21.0m 125mm TWIN WALL FLUE X 2
VS 40 DLEN27 1/2" 4 5 27.0m 125mm TWIN WALL FLUE X 2
VS45 DLEN27 1/2" 5 5 27.0m 125mm TWIN WALL FLUE X 2
VS 50 DLEN27 1/2" 5 5 27.0m 125mm TWIN WALL FLUE X 2

VISION DOUBLE LENGTH EXTENDED RADIANT TUBE (VS DLE - EXTENDED) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
VS 25 DLEN21 1/2" 4 4 21.0m 125mm TWIN WALL FLUE X 2
VS 35 DLEN27 1/2" 4 4 27.0m 125mm TWIN WALL FLUE X 2
VS 40 DLEN32 1/2" 4 4 32.0m 125mm TWIN WALL FLUE X 2
VS45 DLEN32 1/2" 5 5 32.0m 125mm TWIN WALL FLUE X 2
VS 50 DLEN32 1/2" 5 5 32.0m 125mm TWIN WALL FLUE X 2

VISION U-TUBE OIL FIRED RADIANT TUBE (VSXO-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
VSXO 20 UTE 1/2" 6 4.1m 125mm TWIN WALL FLUE X 1
VSXO 25 UTE 1/2" 6 4.1m 125mm TWIN WALL FLUE X 1
VSX0 30 UTE 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSXO 35 UTE 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSXO 40 UTE 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSXO 45 UTE 1/2" 6 7.8m 125mm TWIN WALL FLUE X 1
VSXO 50 UTE 1/2" 6 7.8m 125mm TWIN WALL FLUE X 1

VISION HIGH EFFICIENCY U-TUBE RADIANT TUBE (VSX-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
VSX 20 UTE2M 1/2" 6 4.0m 125mm TWIN WALL FLUE X 1
VSX 25 UTE2M 1/2" 6 4.0m 125mm TWIN WALL FLUE X 1
VSX 30 UTE3M 1/2" 6 4.0m 125mm TWIN WALL FLUE X 1
VSX 35 UTE3M 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSX 40 UTE3M 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSX 45 UTE3M 1/2" 6 6.0m 125mm TWIN WALL FLUE X 1
VSX 45 UTE4M 1/2" 6 7.7m 125mm TWIN WALL FLUE X 1
VSX 50 UTE4M 1/2" 6 7.7m 125mm TWIN WALL FLUE X 1

BTWIN SINGLE LENGTH RADIANT TUBE (BTWIN) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Length Flue size Burner total
BTLH2R25 3/4" 4003106 8.8m 100mm X 1
BTLH2R35 3/4" 4003106 11.1m 100mm X 1
BTLH2R45 3/4" 4003106 16.1m 100mm X 1

ER U-TUBE RADIANT TUBE (ER-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ER 13 UT 1/2" N/A 3470mm 100mm TWIN WALL FLUE X 1
ER 22 UT 1/2" N/A 5244mm 125mm TWIN WALL FLUE X 1
ER 38 UT 1/2" N/A 5895mm 125mm TWIN WALL FLUE X 1

ER SINGLE LENGTH RADIANT TUBE (ER-SL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ER 13 SL 1/2" N/A 6614mm 100mm TWIN WALL FLUE X 1
ER 22 SL 1/2" N/A 8018mm 125mm TWIN WALL FLUE X 1
ER 38 SL 1/2" N/A 12,710mm 125mm TWIN WALL FLUE X 1

ER HERRINGBONE RADIANT TUBE (ER-SL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ER 13 HB 1/2" N/A 6614mm 150mm TWIN WALL FLUE X 1
ER 22 HB 1/2" N/A 8018mm 150mm TWIN WALL FLUE X 1
ER 38 HB 1/2" N/A 12,710mm 150mm TWIN WALL FLUE X 1

AR U-TUBE RADIANT TUBE (AR-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
AR 13 UT 1/2" N/A 3.47m 125mm TWIN WALL FLUE X 1
AR 22 UT 1/2" N/A 5.24m 125mm TWIN WALL FLUE X 1
AR 35 UT 1/2" N/A 5.89m 125mm TWIN WALL FLUE X 1
AR 40 UT 1/2" N/A 5.89m 125mm TWIN WALL FLUE X 1
AR 45 UT 1/2" N/A 7.62m 125mm TWIN WALL FLUE X 1
AR 50 UT 1/2" N/A 7.62m 125mm TWIN WALL FLUE X 1

AR SINGLE LENGTH RADIANT TUBE (AR-SL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
AR 13 SL 1/2" N/A 6.63m 125mm TWIN WALL FLUE X 1
AR 22 SL 1/2" N/A 8.02m 125mm TWIN WALL FLUE X 1
AR 35 SL 1/2" N/A 12.62m / 15.20m 125mm TWIN WALL FLUE X 1
AR 40 SL 1/2" N/A 12.62m / 15.20m 125mm TWIN WALL FLUE X 1
AR 45 SL 1/2" N/A 15.20m / 18.20m 125mm TWIN WALL FLUE X 1
AR 50 UT 1/2" N/A 15.20m / 18.20m 125mm TWIN WALL FLUE X 1

AR DOUBLE LENGTH RADIANT TUBE (AR-DL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
AR 13 DL 1/2" N/A 13.26 125mm TWIN WALL FLUE X 2
AR 22 DL 1/2" N/A 15.8 125mm TWIN WALL FLUE X 2
AR 35 DL 1/2" N/A 25.00m / 30.00m 125mm TWIN WALL FLUE X 2
AR 40 SL 1/2" N/A 25.00m / 30.00m 125mm TWIN WALL FLUE X 2

ARE U-TUBE RADIANT TUBE (ARE-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ARE 13 UT 1/2" N/A 3470mm 125mm TWIN WALL FLUE X 1
ARE 22 UT 1/2" N/A 5244mm 125mm TWIN WALL FLUE X 1
ARE 35 UT 1/2" N/A 5895mm 125mm TWIN WALL FLUE X 1

ARE SINGLE LENGTH / HERRINGBONE RADIANT TUBE (ARE-SL/HB) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ARE 13 SL/HB 1/2" N/A 6614mm 125mm TWIN WALL FLUE X 1
ARE 22 SL/HB 1/2" N/A 8018mm 125mm TWIN WALL FLUE X 1
ARE 35 SL/HB 1/2" N/A 12,710mm 125mm TWIN WALL FLUE X 1

ARE DOUBLE LENGTH RADIANT TUBE (ARE-DL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ARE 13 DL 1/2" N/A 13,106mm 125mm TWIN WALL FLUE X 2
ARE 22 DL 1/2" N/A 16,459mm 125mm TWIN WALL FLUE X 2
ARE 35 DL 1/2" N/A 25,603mm 125mm TWIN WALL FLUE X 2

ARO OIL FIRED U-TUBE RADIANT TUBE (ARO-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
ARO 40 UT 1/4" N/A 5.75m 100mm TWIN WALL FLUE X 1

GRH SINGLE LENGTH RADIANT TUBE (GRH-L) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
GRH 30/12 L 1/2" N/A 12m 80mm X 1
GRH 35/12 L 1/2" N/A 12m 80mm X 1
GRH 40/12 L 1/2" N/A 12m 80mm X 1
GRH 45/18 L 1/2" N/A 18m 80mm X 1

GRH-2 SINGLE LENGTH RADIANT TUBE (GRH-L-2) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
GRH 30/12-2 L 1/2" N/A 12m 80mm X 1
GRH 35/12-2 L 1/2" N/A 12m 80mm X 1
GRH 40/12-2 L 1/2" N/A 12m 80mm X 1
GRH 45/18-2 L 1/2" N/A 12m 80mm X 1

GRH-U-U ON/OFF U-TUBE RADIANT TUBE (GRHU-U ON/OFF) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
GRHU-U 20/6 on/off 1/2" N/A 6m 100mm X 1
GRHU-U 30/6 on/off 1/2" N/A 6m 100mm X 1
GRHU-U 35/6 on/off 1/2" N/A 6m 100mm X 1
GRHU-U 40/6 on/off 1/2" N/A 6m 100mm X 1
GRHU-U 45/9 on/off 1/2" N/A 9m 100mm X 1
GRHU-U 50/12 on/off 1/2" N/A 12m 100mm X 1

GRHU-2U HI/LOW U-TUBE RADIANT TUBE (GRHU-2U HI/LOW) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
GRHU-2U 20/6 hi/lo 1/2" N/A 6m 100mm X 1
GRHU-2U 30/6 hi/lo 1/2" N/A 6m 100mm X 1
GRHU-2U 35/6 hi/lo 1/2" N/A 6m 100mm X 1
GRHU-2U 40/6 hi/lo 1/2" N/A 6m 100mm X 1
GRHU-2U 45/9 hi/lo 1/2" N/A 9m 100mm X 1
GRHU-2U 50/12 hi/lo 1/2" N/A 12m 100mm X 1

OPTIMA SE U-TUBE RADIANT TUBE (OPTIMA SE UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No (nat gas) Flue adaptor No (L.P.G) Length Flue size Burner total
OPTIMA SE 15 1/2" 5130mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 20 1/2" 5130mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 25 1/2" 5130mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 28 1/2" 6925mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 33 1/2" 6925mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 35 1/2" 6925mm 125mm TWIN WALL FLUE X 1
OPTIMA SE 38 1/2" 6925mm 125mm TWIN WALL FLUE X 1

RB U-TUBE RADIANT TUBE (RB-UT) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
RB 18 UT 1/2" N/A 5206mm 125mm TWIN WALL FLUE X 1
RB 30 UT 1/2" N/A 5860mm 125mm TWIN WALL FLUE X 1

RB SINGLE LENGTH / HERRINGBONE RADIANT TUBE (RB-SL/HB) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
RB 18 SL/HB 1/2" N/A 9860mm 125mm TWIN WALL FLUE X 1
RB 30 SL/HB 1/2" N/A 10,870mm 125mm TWIN WALL FLUE X 1

RB DOUBLE LENGTH RADIANT TUBE (RB-DL) gas and flue sizes.

Heater type Gas flex size Flue adaptor No Length Flue size Burner total
RB 18 DL 1/2" N/A 19,600mm 125mm TWIN WALL FLUE X 2
RB 30 DL 1/2" N/A 21,620mm 125mm TWIN WALL FLUE X 2

CB RADIANT TUBE (COBRA - CB) gas and flue sizes.

Heater type Gas flex size Dimensions Flue size Burner total
CB 12 1/2" L-1703mm / W-1254mm / D-201mm 125mm SINGLE WALL / 125mm TWIN WALL FLUE X 1
CB 20 1/2" L-1703mm / W-1254mm / D-201mm 125mm SINGLE WALL / 125mm TWIN WALL FLUE X 1
CB 40 1/2" L-2298mm / W-1865mm / D-256mm 125mm SINGLE WALL / 125mm TWIN WALL FLUE X 1

Related to:

Flue Radiant

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