Taken from the installation instructions - see the last line
The Mira Gem 88 is suitable for installation with the following packages:-
- Gravity fed systems (balanced pressure hot and cold)
- Pumped systems (balanced pressure hot and cold)
- Unvented thermal store * (balanced pressure hot and cold)
- Unvented systems * (balanced pressure hot and cold)
* Fitted with a pressure reducing valve (PRV) recommended to be set at 3.5 bar.
The Mira Gem 88 is not suitable for mains pressure (cold) with gravity pressure
(hot) or combination boilers/instantaneous water heaters.
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