---
title: "Blog posts from Allergies"
description: ""
url: "https://allproelectricalandac.com/blog/tag/81-allergies"
date: "2026-06-10T21:57:55+00:00"
language: "en-GB"
---

#  [ 4 Ways Your HVAC System Impacts Allergies ](https://allproelectricalandac.com/blog/81-4-ways-your-hvac-system-impacts-allergies)

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- By [](https://allproelectricalandac.com/blog/author/156-)  , on 24 August 2018 15:27
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  # Allergies can turn your day into a nightmare of congestion, sniffling and coughing. Typical indoor allergens include mold spores, dust mites, cockroaches, pet dander, pollen from outside and house dust.

**Here are 4 ways your HVAC system could be making things worse and how to deal with it.**

**![hvac 3](https://allproelectricalandac.com/images/2017/hvac-3.jpg)Filters**
Typical pleated filters don't catch tiny allergen particles. You'll need HEPA (High Efficiency Particulate Air) filters capable of stopping 99.97% of particles 0.3 microns or larger. To put it into perspective, dog dander is about 2.5 microns and mold spores range from 10 to 30 microns. Keep in mind that HEPA filters affect airflow and the performance of your furnace so you need to discuss this with an HVAC professional before making the change.

Filters must be changed every four months typically but if you're fighting allergies, you need to replace them more frequently. Allergens that build up on the filter can be blown through the ductwork and the longer you leave it, the worse your symptoms will get.

**Humidity**
High humidity can create the perfect conditions for allergens like mold and dust mites to inhabit your home. Low humidity levels can exacerbate your symptoms by drying out your nasal passage

 [ Read more ](https://allproelectricalandac.com/blog/81-4-ways-your-hvac-system-impacts-allergies)

 - Posted in:
- [All-Pro Electrical & Air Conditioning Blog](https://allproelectricalandac.com/blog/category/3-all-pro-electrical-air-conditioning-blog)
- Tagged with:
- [HVAC](https://allproelectricalandac.com/blog/tag/13-hvac),
- [ventilation](https://allproelectricalandac.com/blog/tag/75-ventilation),
- [Allergies](https://allproelectricalandac.com/blog/tag/81-allergies),
- [Humidity](https://allproelectricalandac.com/blog/tag/82-humidity)

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