Installation options

Flue systems Cyclone BFC

C13

B23

C33

C53

C43

Flue systems Cyclone BFC

Minimum space requirements

BFC 28-60

BFC 80-100

A Cyclone BFC water heater should be installed according category B23, C13, C33, C43 or C53*.

	BFC 28	BFC 30	BFC 50	BFC 60	BFC 80	BFC 100
Concentric

Diameter (mm)	80/125	100/150	100/150	100/150	130/200	130/200

Max. length (m)	40	40	40	15	15	15

Max. 45/90° bends	7	7	7	4	3	3

Parallel (standard diameter)

Diameter (mm)	80	100	100	100	130	130

Max. length (m)	25	80	45	25	115	60

Lequivalent/bend 90° (m)	3,9	4,6	4,6	4,6	2,4	2,4
Lequivalent/bend 45º (m)	1,1	1,2	1,2	1,2	1,4	1,4
Parallel (larger diameter for more length)

Diameter (mm)	100	130	130	130	150	150

Max. length (m)	100	100	100	100	100	100

Lequivalent/bend 90º (m)	4,6	2,4	2,4	2,4	2,6	2,6
Lequivalent/bend 45º (m)	1,2	1,4	1,4	1,4	1,6	1,6

*All Cyclone BFC are also approved for installations where the unit is supplied without venting materials (C63).

Concentric flues

It is not permitted to use more than the specified number of bends, even when the duct is shorter than the maximum length. A 45° bend is equivalent to a 90° bend.

Parallel flues

-The maximum permissible length should be reduced by the equivalent length of each bend. (Note: for a parallel installation this means that 3 changes in direction amount to 6 bends (3 in the supply duct and 3 in the flue).

-The maximum length also applies if a parallel installation has different supply and flue duct lengths (B23, C53).

-Combined flues (C43) shall be fitted with a condensate drain.

Note: horizontal flue runs must be installed with a fall of at least 5 mm per metre.

	BFC 28	BFC 30	BFC 50	BFC 60	BFC 80	BFC 100
	Ø80/125	Ø100/150	Ø100/150	Ø100/150	Ø130/200	Ø130/200
Minimal space for wall duct (mm)

V	550	550	550	550	640	640

W	725	790	790	790	940	940

X	1535	2075	2075	2075	2230	2230
								pleaseapply,conditionsand refer to our website
Y	1460	1480	1480	1480	1620	1620	changetosubjectINT/1108/BFC/04

* Distance without concentric pipe between bend and wall duct.
Y *	1010	1030	1030	1030	1170	1170
Minimal space for roof duct (mm)
V	1305	1500	1500	1500	1730	1730
W	680	1035	1035	1035	1120	1120
X	2965	3325	3325	3325	3620	3620
X **	2015	2375	2375	2375	2670	2670
Y	1575	1415	1415	1415	1560	1560

Y **	625	465	465	465	610	610

For the parts numbers of components and flue gas ducts, etc.
please refer to the “Maintenance and accessories” chapter.
							Data Terms
** Distance without concentric pipe between appliance and roof duct.							Data Terms

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BFC - 100, BFC - 50, BFC - 28 specifications

A.O. Smith is a leading manufacturer in the water heating industry, known for its innovative technologies and high-quality products. Among their impressive line of offerings, the BFC series stands out with three models: the BFC - 28, BFC - 50, and BFC - 100. Each model is designed to meet various heating needs while providing efficiency and reliability.

The A.O. Smith BFC - 28 is an ideal choice for small to medium-sized homes or commercial applications, delivering a maximum output of 28 kW. This model is equipped with advanced heating technology, enabling rapid water heating without significant energy loss. Its compact design is perfect for installations where space is limited, while still providing consistent performance. Key features include a digital thermostat for precise temperature control and an automated system that optimizes energy consumption, leading to cost savings on utility bills.

The BFC - 50 model steps up the performance for larger households, offering 50 kW of heating power. This model is engineered for high-demand scenarios, making it suitable for properties with multiple bathrooms or heavy usage. Similar to the BFC - 28, it incorporates a user-friendly digital interface for effortless temperature adjustments. Its tankless design ensures an endless supply of hot water, while built-in safety features protect against overheating and energy waste.

For those requiring maximum capacity, the BFC - 100 shines with a robust 100 kW output. This model is perfect for large commercial applications or sprawling residences, providing a continuous flow of hot water to meet the highest demands. The BFC - 100 is designed with cutting-edge insulation technology, which minimizes heat loss and enhances energy efficiency. It also features smart connectivity options, allowing users to monitor and control hot water supply remotely.

All three models benefit from A.O. Smith's commitment to sustainability. They are designed with energy-efficient components that meet stringent environmental regulations. Furthermore, their user-friendly maintenance features make it easy for technicians to perform service, ensuring long-lasting performance.

In summary, A.O. Smith's BFC - 28, BFC - 50, and BFC - 100 models deliver exceptional performance, advanced technology, and energy efficiency, making them ideal solutions for various hot water demands. Whether for residential or commercial use, these heaters represent the pinnacle of modern water heating technology, keeping homes and businesses running smoothly.