Its turned very humid in the UK, our comfort cooling chilled water system at work (Lennox system) has had all the set points reduced to remove more humidity from the air whilst the building is cool the air feels damp and muggy.

The Fresh Air Handling system has the set point at 16C and humidity set at 50%. The air being supplied to the system is at 21C and the cooling coil is chilling the air down to 16.3C so this is working fine however the air being supplied back into the building is at 96% humidity so the building in most areas has humidity levels at 64% which is making it feel clammy and muggy.

The humidifier is off and in winter when the air is being reheated the air is always supplied wthin the set points of humidity and temperature. Obviously the cooling coil is working to bring the air to the right temperature but doesnt seem to be removing enough humidity. The reheat coil is not doing anything as the cooling coil is bringing the temperature down to the set point. This system has a pre heat coil, then a cooling coil then another heating coil then the humidifier then it is supplied to each floor.

Any help at understanding this would be greatfuly received.

Kind Regards
Richard.