Rinnai Energysaver RHFE-1004FDT How To Use Manual page 14

When positioning the unit the main points
governing the location are :
(1) Flueing
(2) Warm Air Distribution
This heater must not be installed where
curtains or other combustible materials could
come into contact with it. In some cases
curtains may need restraining.
See diagram for other recommended
clearances.
r
i
1
Flue fittings must be kept clear of flammable
materials.
This unit i s not designed t o be built in.
r-
Flue is not designed to be positioned under
floors, or below the level of the heater.
Flue terminal should be positioned away from
flammable materials.