In a world devoid of home appliances, frozen burritos would be inconvenient, toast would be bread, and fire would be worth a lot more money. Warm up to an accommodating apparatus with this Groupon.

$49 for Home Gas-Furnace or Air-Conditioner Tune-Up (Up to $111.87 Value)

During the approximately one-hour service, technicians evaluate your furnace's electrical and mechanical parts, check air for carbon dioxide leaks, clear drain lines, and take a gas-pressure reading to ensure safety. Air-conditioner tune-ups also include thermostat, filter, fan-motor, and drain-line inspections along with blower-operation testing, temperature, and pressure measures.

Though Boonstra’s One Hour Heating & Air Conditioning sometimes features a discounted price online, this Groupon still offers the best deal available.