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    How the Furnace Can Aggravate Your Pet's Allergies

    Topic: Winter

    During the winter months, pet owners and pets tend to stay inside more, away from the cold and snowy conditions outside. If you live in a cold climate and your pet experiences allergies, you’ll probably be relieved that the grass and leaves have died, and that pollen won’t resurface until spring.

    Unfortunately, many dog owners discover that their dog’s allergies are still acting up, even inside during the winter months. Sneezing, runny eyes, scratching and inflamed skin can persist year-round, but how? What you may not have considered is that your heating system, running constantly in your cooped-up home, might be circulating dust and mold your pet is allergic to.

    Indoor allergies are common, too

    When most people think of allergies, they either think of food allergies or seasonal allergies caused by outdoor plants and pollen. This is why many pet owners are surprised to discover that their pet’s allergy symptoms are still active during the winter, after the plants have died and pollen is long gone.

    However, many indoor substances can be allergens to cats and dogs, too. Things like chemical cleaners and certain brands of cat litter, as well as airborne allergens like dust and mold, can cause allergy symptoms when they are touched or inhaled by your pet. And, because pets tend to be cooped up inside during the winter with the doors and windows closed, their allergies may be even worse than before because your home is not getting as much fresh air or circulation as it does in the warmer months.

    Central heating systems can contribute to these allergies in a very significant way. If dust or mold and mildew have been able to accumulate in your air filter or air ducts, those allergens are being pushed through your vents and circulated throughout your home day after day. When your allergy-ridden pup or kitten takes a breath, they may start to suffer from the irritating symptoms of allergies.

    What to do if winter allergies plague your pet

    If your pet is starting to show signs of allergies this winter, understand that it could be due to a number of things around your home. If you recently started running your furnace, though, that may be a hint that the allergies are related to an airborne allergen. Fortunately, there are a few things you can do to try and eliminate the problem early on and offer your pet some relief.

    • Check the air filter: The air filter in your furnace should be changed every few months to ensure proper function of your heating and cooling system. Over time, this filter collects dust and debris and prevents it from being circulated through your HVAC system. If it doesn’t get changed regularly enough, not only will you have furnace problems, but that dust and debris might begin to be pushed through the ducts anyway, since the filter can’t work as it was intended. Check your air filter and replace it if it’s dirty as a first step in relieving your home of debris.
    • Clean your air ducts: No matter if you have metal or flexible air ducts, they’re bound to collect some dust and debris over time. Air ducts are often out of sight, out of mind for homeowners, and it’s not until they look inside that they realize the amount of air particles being circulated every day. Dirty air ducts can push dust, as well as mold spores, out through the vents, leading to irritated lungs and allergies for pets and humans. If your ducts haven’t been cleaned in a few years, now is the time to have them professionally cleaned out.
    • Use a HEPA filter: A high-efficiency particulate air (HEPA) filter placed in the room your pet sleeps in most often can help pull the majority of dust or mold particles out of the air so you and your pets can breathe more easily. HEPA filters are useful for all kinds of airborne allergens, but they can be particularly beneficial during the winter months when fresh air is scarce.


    Doing these few things to clean out your home’s central air system and create a particle-free space may help alleviate your pet’s allergy symptoms. Unfortunately, not all pets will have the same allergies, and it’s possible that your pet is allergic to something else entirely. You should also check your pet for fleas, as these are common causes of winter allergy responses.

    If your pet’s allergy symptoms persist for a few days after you’ve taken steps to mitigate dust and pests, take them to the vet and inquire about allergy testing to help determine their specific allergens. Your vet may also suggest using itch support products and changing food, litter and other household items to relieve your pet of their discomfort.

    Nettle-Eyebright Gold (2 oz.) (55+ Reviews) Nettle-Eyebright Gold is a  combination of herbal ingredients designed by our holistic veterinarian for  canine allergies (allergic rhinitis or hay fever). The herbs, Nettle and  Eyebright are two of the main ingredients and have been used extensively for  natural support of seasonal allergies. LEARN MORE

    Meet Our Expert

    Dr. Janice Huntingford

    Pet Wellbeing's own Dr. Jan has been in veterinary practice for over 30 years. Since receiving her Doctor of Veterinary Medicine at the Ontario Veterinary College, University of Guelph, she's founded two veterinary clinics and lectured extensively on pet herbal therapy, nutraceuticals, acupuncture, rehabilitation and pain management.

    Dr. Jan has studied extensively in both conventional and holistic modalities, helping us to formulate all of our supplements. She is an essential part of Pet Wellbeing.

    And lucky for us, she's only one of the great team of people who make Pet Wellbeing so special.

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