Study of 243 air purifiers reveals the most energy efficient air purifier, the average air purifier power consumption along with insights into their effectiveness (incl. CADR/W and CFM). Get the results here.
See which electric fireplaces are the most efficient, and get the average electric fireplace wattage and Btu from a study of 117 of the most sold fireplaces. Also see how they compare with other electric heaters.