Greenway

  As ever on a budget waste not want not approach. mostly stuff I had in stock Code ERV Code Six individually fused channels Power board shown in place. 35 Amp Hall effect current sensor. Driver code here  ERV Code Dashboard for ERV fan control and testing      Six controlled channels with 25Khz PWM fan speed control The first layer of the system. Two Arduinos one for control one for networking, Code here  ERV Code

  Decent low energy cost for all electric heating 3.5KW heat pump and a 2KW electric convection heater. Energy consumption The raw data is here  The data shows the device switching on and off under control of Hubitat