FlexiTank
FlexiTank sizing
The tank size depends on the building heat load. Assuming typical heating conditions, the following will help you to estimate the size of the FlexiTank required: for every 1,000 BTU/hr of heat load, plan for an annual consumption of 330 lb of pellets.
Examples:
Heat load 41,000 BTU/hr (12 kW) x 0.33 lb = 13,530 lb.......FlexiTank S2822H or S280H
Heat load 68,300 BTU/hr (20 kW) x 0.33 lb = 22,539 lb.......FlexiTank S2819H
Heat load 109,500 BTU/hr (32 kW) x 0.33 lb = 36,135 lb.........FlexiTank S190H
Select following dimensions of full FleXILO tanks |
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| FlexiTank | S110H | S190H | S220H |
| Filling capacity (lbs)* | 992 |
6,150 - 7,050 |
6,850 - 8,000 lb |
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Dimensions Depth (Inch) Height (Inch) |
43 3/8 43 3/8 53 1/4 |
77 5/8 77 5/8 76 7/8 |
89 1/2 89 1/2 76 7/8
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Minimum room height (Inch) |
84 5/8 |
84 5/8 | 84 5/8 |
| FlexiTank | S280H | S2819H | S2822H |
| Filling capacity (lbs)* | 10,150 - 11,900 |
7,700 - 8,850 |
9,250 - 10,600 |
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Dimensions Depth (Inch) Height (Inch)
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113 1/8 113 1/8 76 7/8
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77 5/8 113 1/8 76 7/8
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89 1/2 113 1/8 76 7/8
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Minimum room height (Inch) |
84 5/8 |
84 5/8 |
84 5/8 |
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* The capacity depends on the height of the room, max. = 94 1/2 Inch
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Select following dimensions of full FleXILO Plus tanks |
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| FlexiTank | S2819R | S2822R | S280R |
| Filling capacity (lbs)* | 9,900 - 11,050 |
11,500 - 13,250 |
13,700 - 15,500 |
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Dimensions Depth (Inch) Height (Inch)
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77 5/8 113 1/8 76 7/8
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89 1/2 113 1/8 76 7/8
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113 1/8 113 1/8 76 7/8
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* The capacity depends on the height of the room, max. = 94 1/2 Inch
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| FlexiTank | S2819N | S2822N | S280N |
| Filling capacity (lbs)** |
6,800 - 8,000
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8,000 - 9,700
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9,300 - 11,000
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Dimensions Depth (Inch) Height (Inch) |
77 5/8 113 1/8 63
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89 1/2 113 1/8 63
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113 1/8 113 1/8 63
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** The capacity depends on the height of the room, max. = 84 3/4 Inch
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FlexiTank storage
Pellets are delivered by tanker truck and are blown into the store room or the FlexiTank. The truck's pumping hose is max. 99 ft (30 m) length, so the FlexiTank (or rather the filler coupling) must be no more than 99 ft from the drive, parking space or road. If possible, the FlexiTank room should border at least one exterior wall, since the filler coupling must be accessible from the outside. Where this is not possible, ventilation and filling pipes must be routed to a filler coupling on the outside of the building. (Attention - in some regions fire regulations must be observed). The boiler room should also have at least one exterior wall in order to allow direct ventilation. For boiler rooms which do not border an exterior wall, a ventilation pipe (at least 31 square inch) must be routed to an exterior wall.
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Click on the sketch to zoom in. |
Room dimensionsLayout:The tank installation room must be at least 3 - 4 inch wider than the tank itself. For example: S190 – tank width 77 5/8 inch minimum room width = 80 3/8 inch.
For installation reasons, on the side of the tank where the filler coupling is fitted, the room must be 12 inch longer than the minimum stated. For example: S190 – minimum room length: 79 inch + 11 7/8 inch = 92 7/8 inch.
Height of the room: The minimum required height of the room is 84 70 7/8 inch.
Connection to the heating system:The boiler has its own wire centre. It requires a 6 Amp power supply.
External emergency stop switch:Outside the boiler room, and near the boiler room door, we recommend an „emergency stop switch“. |
Tank room and boiler equipment
Walls: The wall and ceiling fire resistance for the tank room and the boiler room must be Class F 90.
Doors: As for all heating systems, the pellet storage room andthe boiler room doors must be fire resistant (minimum 30T), must open outwards and must have seals
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Ground plan Click on the sketch to zoom in. |
Sectional view Click on the sketch to zoom in. |
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Filling system: In general if a FlexiTank is used, there is no need to remove the air blown in. However the room where the FlexiTank is installed must have an adequate breather opening (window or similar) of section at least 67 inch. According to the size of the tank or the position of the supply unit you will need up to two fillers to fill the FlexiTank evenly.
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