Jet.com offers the Rheem Tankless Electric Water Heater, model no. RTE-9, for $189.99. Coupon code "ELECTRONICS30" cuts it to $159.99. With free shipping, that's the lowest total price we could find by $30. It heats up to three gallons per minute. Deal ends December 12.
Note: You can also receive additional discounts during checkout by waiving free returns or by choosing select payment options. The coupon can be used once per account.