Like hugging a hungry polar bear, drafty homes make people feel cold and uncomfortable. Keep houses airtight and efficient with today's Groupon: for $149, you get an in-home efficiency assessment (a $99 value) and a single furnace-system duct sealing (a $199 value) from Effortless Efficiency (a $298 total value). For a list of available zip codes within Effortless Efficiency's service area, click here.

Over the course of a two-hour energy assessment, Effortless Efficiency will perform an exhaustive top-to-bottom visual inspection and home assessment. Trained technicians will inspect airflow in each room and examine the permeability of doors, windows, and fireplace flue vents, seeking out dastardly drafts and leaks. Effortless Efficiency energy specialists will also inspect insulation inside attics and crawl spaces, assess the efficiency of all appliances, and provide water-use ratings for toilet, sinks, and showers before monitoring heating and cooling airflow and sitting down with homes' furnaces and AC units to conduct lengthy interviews on their age and efficiency.

Following completion of the assessment, homeowners will receive a full report with recommended upgrades, as well as a list of pricing estimates to fix energy-sucking imperfections. After assessments, a second Effortless Efficiency expert will conduct a two-hour furnace-system duct sealing. Armed with aluminum-foil tape and duct mastic, technicians will seal all mechanical joints in the basement and accessible crawl spaces for one furnace system, giving special attention to the sections closest to the furnace itself, where air pressure and instances of dragon hatchings are highest.