If you find that rooms are consistently well ventilated there is no need to continue keeping them on your rota for monitoring carbon dioxide levels unless occupancy or use of room is changed.
Os bydd unrhyw newidiadau neu wahaniaethau o ran lefelau’r gwasanaeth dylech adolygu a diwygio’ch cynlluniau yn ôl y galw er mwyn sicrhau eu bod yn cyd-fynd.