Breathe Easy This Winter: Improving Indoor Air Quality with Your Heat Pump

Now we are officially in a New Zealand winter with a cold front covering most of the country this week, homeowners across the North and South Islands alike are turning their heat pumps on and lighting fireplaces in record numbers. But beyond just heating your home, have you considered the quality of the air you are breathing inside? There is a large and growing body of research showing the importance of air quality for our health, and it is critical that we understand that a truly healthy home is one where the air is not only warm and comfortable but also clean and free from pollutants. 

At OneAir, our commitment goes beyond just heat pump installation; we're passionate about fostering healthier indoor living environments and improving the well-being of all Kiwis. 

This comprehensive guide is designed specifically for New Zealand homeowners, exploring options for a new heat pump system or those specifically seeking to maximise the indoor air quality benefits of your existing unit in preparation for the colder months ahead.

The purpose of this article is to show how your heat pump can help the quality of your indoor air, or if an additional air purifier is required, thereby empowering you with the knowledge to make informed decisions for your home and family's well-being. By the time you finish reading, you'll gain a deeper understanding of how modern heat pumps actively contribute to superior indoor air quality, the signs of poor indoor air and what to do about them, essential heat pump maintenance practices to ensure peak performance, and the significant role of complementary solutions like effective ventilation system installation.

The Unseen Threat: Understanding the common Indoor Air Quality issues in New Zealand Homes

New Zealand homes can be susceptible to a range of indoor air quality issues, especially during winter when windows are often closed and ventilation is reduced. Common culprits include:

• Dampness and Mould: High humidity, often exacerbated by drying laundry indoors or inadequate ventilation, creates prime conditions for mould growth. Mould spores are significant allergens and can trigger respiratory problems.

• Dust Mites: Thrive in warm, humid environments and are a common cause of allergies and asthma.

• Pet Dander: Microscopic flakes of skin shed by pets are potent allergens.

• Volatile Organic Compounds (VOCs): Released from everyday household products like cleaning supplies, paints, and furnishings, VOCs can contribute to respiratory irritation, headaches, and other health issues.

• Combustion By-products: If you have an unvented gas heater or wood burner, these can release carbon monoxide, nitrogen dioxide, and particulate matter, all detrimental to health.

• Pollen and Outdoor Pollutants: Even when windows are closed, microscopic particles from outside can infiltrate your home.

The impact of poor indoor air quality can range from minor irritations like itchy eyes and sore throats to more severe health conditions such as asthma attacks, chronic respiratory issues, and weakened immune systems. For families with children, the elderly, or people with pre-existing respiratory conditions, maintaining excellent indoor air quality is not just a convenience, but a necessity for family and individual health and well-being.

Beyond Heating: How Your Heat Pump Improves Indoor Air Quality

While their primary function is to efficiently heat (and cool) your home, modern heat pumps are sophisticated systems that offer significant benefits for indoor air quality. This is largely due to their advanced filtration capabilities and their role in managing humidity.

1. Heat Pump Air Filtration Systems: Your Home's First Line of Defence

Unlike traditional heaters, as devices that actively recirculate air, most heat pumps come equipped with filtration systems designed to capture a wide range of airborne contaminants, some of which are multi-stage. These filters act as your home's internal air purifiers, removing air particles before they can circulate throughout your living spaces.

• Standard Filters: Even basic heat pump filters, often made of washable mesh, are effective at trapping larger particles like dust, pet hair, and lint. Regular cleaning of these filters is paramount to their effectiveness and the overall efficiency of your unit.

• Electrostatic Filters: Many modern heat pumps feature electrostatic filters that use an electrical charge to attract and hold microscopic particles such as pollen, mould spores, and even some bacteria and viruses. These are significantly more effective than standard filters.

• Activated Carbon Filters: Some premium heat pump models incorporate activated carbon filters. These are specifically designed to absorb odours, smoke, and volatile organic compounds (VOCs), greatly improving the freshness of your indoor air. If you're sensitive to smells or live in an area with external odours, this feature is invaluable.

• Specialised Allergen Filters: Certain heat pump brands offer specialised filters engineered to capture ultra-fine particles, including common allergens like dust mite faeces and specific types of mould spores, providing significant relief for allergy and asthma sufferers. 

  • Panasonc’s nanoeTM X technology, which provides several benefits including improved indoor air quality through the inhibition of bacteria, viruses, mould, and allergens, as well as deodorisation. 

  • Mitsubishi Electric’s Plasma Quad Plus Advanced Filtration Technology features high-performance two-stage plasma technology, filters the air to clean away smells, dust, moulds and other common household allergens

2. Dehumidification: Combatting Dampness and Mould

New Zealand's climate can be notoriously humid, especially during winter, which creates an ideal breeding ground for mould, mildew, and dust mites. One of the unsung heroes of heat pump functionality in improving indoor air quality is their ability to dehumidify by warming the air in general.

• How it Works: When your heat pump operates in cooling or "dry" mode (though some units offer dedicated dehumidification even when heating), it removes moisture from the air as part of its refrigeration cycle. The warm, moist air passes over the cold evaporator coil, causing water vapour to condense and drain away.

• Preventing Mould Growth: By actively reducing indoor humidity levels, your heat pump effectively inhibits the growth of mould and mildew, which require moisture to thrive. This is crucial for preventing respiratory issues and maintaining structural integrity within your home.

• Discouraging Dust Mites: Dust mites flourish in high humidity. Lowering the moisture content in your home makes the environment less hospitable for these common allergens, reducing their population.

• Improved Comfort: Drier air feels warmer, even at the same temperature. This can contribute to greater comfort and potentially allow you to set your thermostat slightly lower, saving energy.

For New Zealand homeowners, the dehumidification function of a heat pump is particularly valuable, offering a proactive defence against the pervasive issues of dampness and mould that plague many homes.

Essential Heat Pump Maintenance for Optimal Indoor Air Quality

To ensure your heat pump continues to be an effective ally in your quest for superior indoor air quality, regular and proper heat pump maintenance is highly recommended. Neglecting maintenance not only diminishes the air quality benefits but also reduces efficiency, increases running costs, and shortens the lifespan of your unit.

DIY Maintenance: What You Can Do

• Clean or Replace Filters Regularly (Monthly/ Bi-Monthly): This is the single most important maintenance task you can perform.

  • Washable Filters: Carefully remove filters and rinse them under lukewarm water until the water runs clear. Allow them to air dry completely before reinserting. Never put wet filters back into your unit.

  • Disposable Filters: Follow the manufacturer's recommendations for replacement frequency, typically every 1-3 months, especially during peak usage seasons like winter. Mark your calendar!

  • Why it Matters for IAQ: Clogged filters restrict airflow, forcing your unit to work harder and reducing its ability to capture airborne particles. They can also become breeding grounds for mould and bacteria if not cleaned, recirculating contaminants back into your home.

• Keep the Outdoor Unit Clear: Ensure the outdoor unit is free from leaves, debris, grass clippings, and snow. Obstructions can hinder airflow and reduce efficiency. Trim any foliage that is growing too close.

• Clean the Indoor Unit's Exterior: Gently wipe down the exterior of your indoor unit with a damp cloth to prevent dust buildup.

• Check for Unusual Noises or Odours: If you notice any strange sounds (rattling, grinding) or persistent musty odours emanating from your unit, it's a sign that something might be amiss and requires professional attention.

Professional Heat Pump Maintenance: The Annual Check-up

While DIY tasks are crucial, an annual professional heat pump maintenance service is vital to ensure your system is operating at peak performance and providing the best possible indoor air quality. A qualified technician will:

• Thoroughly Clean Coils: The evaporator and condenser coils can accumulate dirt and grime over time, reducing efficiency and acting as potential sites for microbial growth. Professionals use specialised cleaners to ensure these are spotless.

• Check Refrigerant Levels: Correct refrigerant levels are critical for efficient operation and dehumidification. Low levels can impact performance and potentially indicate a leak.

• Inspect Electrical Components: Loose connections or faulty wiring can pose safety hazards and affect unit performance.

• Lubricate Moving Parts: Ensures smooth and quiet operation and prevents premature wear.

• Inspect Drainage System: Ensures condensate water is draining correctly, preventing leaks, mould growth, and water damage within the unit and your home.

• Assess Overall System Performance: The technician will perform a diagnostic check to ensure all components are working harmoniously and efficiently.

• Identify Potential Issues Early: Catching minor problems before they escalate into major, costly repairs.

OneAir's experienced technicians are specifically trained in all aspects of heat pump maintenance for a wide range of brands and models common in New Zealand homes. Investing in professional servicing ensures your heat pump remains an effective tool for both heating and superior indoor air quality.

Choosing the Right Heat Pump System for Optimal Indoor Air Quality

If you're in the market for a new heat pump, considering its impact on indoor air quality should be a key factor in your decision-making process. Here's what to look for:

• Filter Quality: Find out about the type and efficiency of the filters. Look for models with advanced filtration technologies like electrostatic or activated carbon filters if allergies, odours, or VOCs are a concern. 

• Dehumidification Features: Ensure the unit has an effective dehumidification mode.

• Appropriate Sizing: An undersized heat pump will struggle to heat your home efficiently and may not adequately filter or dehumidify the air. An oversized unit can short-cycle, leading to less effective dehumidification and increased wear and tear. OneAir provides expert consultation to ensure you get the perfectly sized unit for your home's unique requirements.

• Reputable Brands: Choose reputable brands known for their innovation in air quality features and energy efficiency. OneAir partners with leading manufacturers to provide top-tier heat pump solutions.

• Installation Expertise: Even the best heat pump won't perform optimally if not installed correctly. Professional heat pump installation by certified technicians is crucial for efficiency, longevity, and ensuring all air quality features function as intended.

Preparing Your Home for Winter: A Checklist for Healthy Indoor Air

As winter approaches, take these steps to ensure your home's indoor air quality is at its best:

1. Service Your Heat Pump: Schedule your annual professional heat pump maintenance. OneAir uses microbiocidal, biodegradable cleaning agents to ensure mould, bacteria and viruses are sterilised at the source.

2. Clean/Replace Filters: Perform your DIY filter cleaning/replacement every month or two to ensure efficient operation.

3. Check for Mould and Dampness: Inspect bathrooms, laundries, and cold spots for any signs of mould. Address any water leaks or excessive condensation promptly. 

4. Use Extractor Fans: Always use extractor fans in bathrooms and kitchens during and after use to remove moisture and odours.

5. Consider a Balanced Ventilation System: If you consistently battle dampness, condensation, or stale air and are unable to leave your windows open for several hours each day, schedule a ventilation system installation discussion with OneAir. We give free advice and quotes for several options to fit anyone’s budget.

6. Minimise Indoor Pollutants:

   • Use natural cleaning products where possible.

   • Ensure proper ventilation when painting or using strong chemicals.

   • Avoid indoor smoking.

   • Vacuum regularly with a HEPA-filtered vacuum cleaner.

   • Manage pet dander through regular grooming and cleaning.

7. Monitor Humidity: Consider a simple hygrometer to monitor indoor humidity levels. Aim for between 40-60%. Don’t let your indoor temperature drop below 18 degrees. Your heat pump is ideal to help manage this.

Your Partner for Healthier Indoor Air in New Zealand

At OneAir, we believe that every New Zealander deserves to live in a home with clean, healthy, and comfortable air. Our expertise in heat pump installation, comprehensive heat pump maintenance, and effective ventilation system installation positions us as your trusted partner for all your heating, cooling and ventilation needs. Don't let winter bring concerns with indoor air quality. Embrace the season knowing you've taken proactive steps to protect your family's health and well-being.

Whether you're looking for a new heat pump, need your current system serviced, or are exploring ventilation solutions, contact OneAir today at (0800) 663 247 for a free consultation. Let us help you breathe easy this winter and for many winters to come!