HVAC technicians are required to undergo and complete a minimum of six months up to two years of training. Training programs must be taken from technical schools accredited by organizations like HVAC Excellence or (PAHRA) the Partnership for Air-Conditioning, Heating Refrigeration Accreditation.
ICD-9-CM Volume 2 Index entries containing back-references to 783.1: 1  Abnormal, abnormality, abnormalities - see also Anomaly weight gain 783.1 of pregnancy 646.1 with hypertension - see Toxemia, of pregnancy. 2  Excess, excessive, excessively weight 278.02 gain 783.1 of pregnancy 646.1. 3  Gain, weight (abnormal) (excessive) (see also Weight, gain) 783.1.
Rapid unintentional weight gain may be due to medication side effects. Many cases of unintentional weight gain are harmless. But some symptoms experienced along with rapid weight gain may signal a medical emergency. What causes unintentional weight gain? Pregnancy. The most common cause of unintentional weight gain is pregnancy. But many women do intentionally eat more to support the growth of the baby. During pregnancy, most women put on weight as the baby grows.