How To Pest Proof Your HVAC Components

Prevent pest infestations and the problems which go along with it by taking steps to make sure your HVAC system and its components are protected.

Seal Your Ducts

Gaps, cracks, and larger disconnections in the duct system create points of access for pests to enter your HVAC system as well as your home or building’s interiors. Insects, mice, and larger vermin may enter the duct system, depending on the size of air leaks.

Not only can pests in your ducts cause damage to the ductwork itself, it can cause serious indoor air quality issues. Excrement and dander left behind by the pests will spread into your interiors as conditioned air circulates through the duct system, posing a health hazard to occupants.

Treating with pest poison isn’t an ideal strategy for a duct infestation. Sure, it can kill the pest, but they’ll likely die within your duct system, creating a problem in and of itself. Decaying rodent carcasses within your ductwork can spread odors through the structure, and locating them for removal can be a challenge. Spraying pesticides into the ducts will cause the pesticides to recirculate back into your home or business.

Trapping is a better option when ductwork is infested; live traps can be set inside the ducts to trap larger pests such as mice and rats, so they can be removed, while glue traps can be used to catch insects. Ductwork should be professionally sealed and you may elect to treat the home or business with pesticide to prevent reinfestation. Duct cleaning can remove dead pests as well as the debris they’ve left behind to improve indoor air quality.

Install flue and vent covers

Your HVAC system utilizes flue pipes to expel byproducts of combustion from the furnace; these pipes must be in good working order to protect occupants from dangerous carbon monoxide poisoning. If critters, such as birds and chipmunks, enter the flue pipes and perish, their remains can block the flue, forcing combustion byproducts back into the home or building.

Your home or business may also have fresh air intakes and other exterior vents which are components of ventilation systems, such as whole-home ventilation or exhaust fans for kitchens and bathrooms. Pests can enter the building through exterior vents, and often find these areas to be an ideal location to build their nest.

Vent covers should be installed on all exterior flues, intakes, and exhaust vents. These covers will block pests’ point of entry, preventing them from travelling inside your home or business, and keeping your pipes clear of nests. These covers have additional benefits, such as keeping rain water out of your vents. Make sure vent covers are installed securely; small animals can be resourceful, and may find a way to pull off your covers if they are not on tightly.

Protect your air conditioning condenser

Rodents and other small animals can cause great damage to your exterior air conditioning condenser. They can damage components by chewing, scratching, urinating, and more – even their presence can harm the system, should you happen to turn the air conditioning system on when they are inside.

Your best line of defense in protecting your condenser is preventing rodents from coming near it to begin with. Keep the area surrounding your condenser clear by cleaning around it on a regular basis. Cut away vegetation and clean excrement, which can attract vermin to the area initially. Warm water and a mild soap can be used to scrub the exterior of the unit as well as the surrounding area.

Use a pet repellant to deter animals from coming to the area. Pet repellants contain scents which are unattractive to animals, so by spraying it on the condenser its surroundings, animals will not want to come nearby. Pet repellants are a safer alternative to chemical pest treatments as they are natural, so you won’t risk the negative side effects of pesticide exposure when working to prevent pest issues.