Northern Tool takes up to 60% off a selection of heaters, stoves, fireplaces, and more. (Scroll down and click on "Heater Sale" banner to see these deals.) Plus, get an extra $10 off orders of $50 or more via coupon code "251087" or an extra $20 off orders of $100 or more via coupon code "251088". Where available, opt for in-store pickup to avoid shipping costs, which start at $5.99. (Free shipping is available for select items.) Deal ends February 21. A couple of best bets, both with prices after coupon code "251087":