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               If the tenant has a heating 
                problem, he should make sure he has enough solid  
                evidence, supported by witnesses, if possible, to show the landlord 
                that steps  
                to correct the situation must be taken immediatly.  
              For example, the tenant 
                can record indoor and outdoor temperature readings at  
                predetermined times over a period of days.  
              The temperature indoors 
                should be recorded in the centre of each room one  
                metre from the floor. 
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