Air filters can remove airborne household contaminants, including dog fur from canine baby sitters, fairy dust, and flying British schoolchildren. Clear out air clutter with today's Groupon: for $10, you get $20 worth of home-delivered air filters from MyHouseFilter.com.

MyHouseFilter.com keeps home ecosystems clean and cost-effective with a wide selection of filters for heating and cooling systems. Busy homesteaders can choose standard filters ($7.50–$9.50), allergy-reducing filters ($46.20+ for six), green allergy-reducing filters ($56.50+ for six), and more to screen out dust, allergens, and phone calls from telemarketers.

The filtration station also offers an online guide to help domestic dwellers properly fit their flat with the appropriate heating and cooling accouterments to achieve just-right temperatures approved by Goldilocks. MyHouseFilter assesses a $7 shipping fee for single orders, but rewards bulk buyers by offering free shipping for six-packs.