Should i facture in elec costs when your s7-ln is heating your house

So i bought an s7-ln on Facebook for $100 which i thought was a good deal seen them on ebay $400+. Usually i have my electric heaters on, however the heat from the s7-ln is keeping the main living area quite warm. Should i facture in the elec cost because the s7-ln is replacing the electric heaters or offset the elec cost to a lower value.

Compare the Current Draw between the two… The difference in Wattage will be your electric cost for running your mining.