Mira FORM Installation & User Manual page 11

Gas Heated Shower - The shower MUST be installed with a gas water heater or
combination boiler of a fully modulating design. A modulating boiler is one that the
draw off rate is indirectly controlling the gas flow to the boiler, producing a relatively
constant hot water temperature.
Unvented Mains Pressure Shower - The shower can be installed with a unvented,
stored hot water cylinder. Only "a competent person" as defined by the Building
Regulations may fit this type of system.
Safety devices
not shown
for clarity
Cold
Cold Hot
Hot
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