The vertical compaction technique is an improvement to increase the fit in root canal fillings. Currently, on the market, the EQ-EV heat compactor is being introduced by the manufacturer and being used by many clinics. Objective: Evaluation of the effectiveness of sealing the root canals with the EQ_EV heat compactor. Methods: A Non-controlled case study was conducted. Results and conclusions: 30 teeth with the EQ-EV heat compactor,  it shows that:  there  is the correlation between the volume of  filling and canals on X-ray film: 90% full-filling; excess filling rate: 6,7%;   missing fillings: 3.3%. The correlation between cementum and tootn apex shows that the rate of cement reflux in the apical region: is 10%; missing is 3.3%. The correlation between GP and apex shows that the ratio of  GP is moderate to the apex of 90%,  rate over-apex 3.3%; Missing in  the apical 1/3 is 6.7%. The homogeneity of the filling material by compaction is high 93.3%. The adaptation of the root canal surface to the first third of the neck: 100%;  middle third: 96.7%; apical1/3 segment 96.7%.