Lets break it down abit.
The United States has three ionospheric heating facilities: the HAARP, the HIPAS, near Fairbanks, Alaska, and (currently offline for modifications) one at the Arecibo Observatory in Puerto Rico. The European Incoherent Scatter Scientific Association (EISCAT) operates an ionospheric heating facility, capable of transmitting over 1 GW (1,000,000,000 watts) effective radiated power (ERP), near Tromsø in Norway. Russia has the Sura ionospheric heating facility, in Vasilsursk near Nizhniy Novgorod, capable of transmitting 190 MW ERP.
This is what the HAARP facility is advertising,as you will
The HF transmitter system is able to produce approximately 3.6 million Watts of radio frequency power. However, the HAARP transmitters have been designed to operate very linearly (in Class AB mode) so that they will not produce radio interference to other users of the radio spectrum. To achieve that degree of linearity, the transmitters operate at an efficiency of only about 45 %. For every 100 Watts of input power 45 Watts of Radio Frequency power is generated and the rest is lost in the transmitter cabinet as heat. (As an analogy, a 75 Watt light bulb gets quite hot while it's producing the light you actually see.) In addition, the on-site diesel generators must provide power for other equipment used by the transmitters including the cooling system and low level amplifier stages. As a result, approximately 10 million Watts of prime power will be required when the transmitter system is operating at full power.
This is what HIPAS is advertising
High-power radiating facility at the HIPAS Observatory Wong, A. Y.; Carroll, J.; Dickman, R.; Harrison, W.; Huhn, W. Radio Science (ISSN 0048-6604), vol. 25, Nov.-Dec. 1990, p. 1269-1282. Research supported by the U.S. Navy. UCLA's RF ionospheric heater, 40 km east of Fairbanks, Alaska, consists of eight crossed dipole antennas arranged in a circular pattern to give a gain of 18.4 dB over isotropic at 2.85 MHz. At 1.2 MW total radiated power, the array has a calculated equivalent radiating power of 84 MW. The eight transmitter antennas are managed by a PC which controls power, modulation, and beam steering. Methods of tuning the antennas, to achieve either right (O mode) or left (X mode) circular polarized radiated beams are described.