It depends on the thermal performance of your house and your heating habits!
The MyDATEC thermodynamic CMV can provide an average of up to 3KW of heating power through its heat pump alone on extracted air.
In new buildings: As a general rule, MyDATEC provides almost all the heating needs in newly built houses that meet RT2012 standards. A supplement via a wood stove, a Canadian well, and/or electric resistances of safety for the big cold could be recommended in certain cases.
In renovation, MyDATEC provides in most cases the totality of the heating needs in mid-season, which will allow you for example to stop your old more energy consuming system during this period of the year. In some cases, MyDATEC and your other heating system can be coupled to work together in the most economical way.
The best solution: Depending on the thermal performance of your house, its surface and the region where you live, a specialized thermal study office will be able to tell you the heat output you need. Based on this study, we will be able to tell you if your MyDATEC installation requires additional heating