If not paying electric, we block the heat vents and the return air vent under the steps, and use two Lasko tower heaters. If we are paying for electic, we split the heating between the furnace and the Laskos...covering the vents and the return air vent when not using the furnace. If using both, we use the furnace in the morning to help take the chill off, then the Laskos the rest of the day.
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