Here in Europe these machines are called simply double-flux VMC, mandatory in "new" home (where new vary since in some northern countries are mandatory since a

Here in Europe these machines are called simply double-flux VMC, mandatory in "new" home (where new vary since in some northern countries are mandatory since a decade or so, while in the south it's more a recent thing, depending on local climate). They are VERY cheap in industrial terms, not so cheap for what they are in end-buyers terms. BUT really new buildings start to propose something better, "thermodynamic VMC" who happen to be double flux ones as well but instead of passively recovery the heat/cool they are active, meaning a small heat pump between the two flux. It's far less cheap in electricity bill (mine consume 10+kWh/day for 350 m³/h, 12.360 ft³/h if this is the unit Imperial system use) but they de-humidify extremely well. IME those last + low inertia heating result in LESS expensive heating/cooling than passive ones + same heating. At least in a not so cold/not too hot place (typical winter minima -25℃, -15℃ this year, typical summer maxima +30-32℃).