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INSTALLATION CONSIDERATIONS
1. Be sure the ceiling height is no less than the Figures in above table B column.
2. Unit must not be installed close to boiler flues.
3. The Mark ERV is only suitable as a decentralized heat recovery unit with max. 3-5 meters preferably
straight ductwork. The situations below should be avoided. If this advice is deviated from, the maximum
air flow rate of the unit will not be achieved.
EN
Serve bends
Multiple direction changes
Multiple reducers/
crimped duct
4. Excessive use of flex-duct and long flex-duct runs should be avoided.
5. Fire dampers must be fitted as per national and local fire regulations.
6. Unit must not be exposed to ambient temperature above 40°C and should not face an open fire.
7. Take action to avoid dew and frost. As shown by drawing below, unit will produce dew or frost when
saturation curve is formed from A to C. Use pre-heater to ensure conditions are kept to right of the
curve (B to B',to move C to C) to prevent condensation or frost formation.
8. To avoid the outdoor exhaust air cycling back to indoor, the distance between the two vents installed on
the outside wall should be over 1000mm.
9. If heater is equipped to the unit, operation of heater should be synchronous with the unit, so that the
heater starts to work only when unit starts.
10. Duct muffler may be considered if user wants indoor noise to be minimized.
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