Flue Requirements - Rinnai HDC 1600i Low NOX Installation And User Manual

General Information on the internal range of water heaters.
The Rinnai HDC internal water heaters are room sealed appliances. Ventilation
requirements of BS 5440 allow room sealed appliances to be installed in spaces and
rooms, including bedrooms, without ventilation.
If a Rinnai HDC internal water heater is installed in a compartment it must have the
following amount of permanent ventilation.
Ventilation from compartment to room:
2
560 cm at high level AND
2
560 cm at low level
2
Based on 10cm /kW net heat input
Ventilation from compartment directly to outside:
2
280 cm at high level AND
2
280 cm at low level
2
Based on 5 cm /kW net heat input
The area given is the free area of the vent or equivalent free area for ventilators of more
complex design. Any space taken up by grille louvers should be subtracted from the total
area to find the free area of the vent. For two heaters the area should be doubled, for
three tripled, and so on.
Windows and doors can not be considered ventilation unless they are permanently fixed
in the open position.
Please refer to IGE/UP/10 Part 1. Edition 2 page 17 for further information or contact
Rinnai UK.
ATTENTION: air surrounding the water heater, venting and vent termination(s) is used
for combustion and must be free of any compounds that cause corrosion of internal
components. These include corrosive compounds that are found in aerosol sprays,
detergents, bleaches, cleaning solvents, oil based paints/ varnishes, and refrigerants.
Therefore Rinnai recommends outdoor models be used for these locations where
possible.
The water heater, venting and vent termination(s) should not be installed in any areas
where the air may contain these corrosive compounds. If it is necessary for a water
heater to be located in areas which may contain corrosive compounds, Rinnai strongly
recommends the following:
Indoor/Internal Water Heaters:
* DO NOT install in areas where contaminated air is present
* Consider before installation where air has the ability to travel within the building
* Where possible, install the water heater in a sealed closet so that it is free of
contaminated indoor air
* Chemicals that are corrosive in nature should not be stored or used near the water
heater
Outdoor/External Water Heaters and Vent Terminations of Indoor/Internal Water
Heaters:
* Install as far away as possible from exhaust vent hoods
* Install as far away as possible from air inlet vents. Corrosive fumes may be released
through these vents when air is not being brought in through them.
* Chemicals that are corrosive in nature should not be stored or used near the water
heater or vent termination.
Damage and repair due to corrosive compounds in the air is not covered by warranty.

FLUE REQUIREMENTS

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