Understanding MVHR Servicing for Your Property Needs

Mechanical Ventilation with Heat Recovery (MVHR) systems have become a popular choice for modern homes and buildings aiming to improve indoor air quality while saving energy. These systems work by exchanging stale indoor air with fresh outdoor air, recovering heat in the process to reduce energy loss. However, like any mechanical system, MVHR units require regular servicing to maintain performance and ensure a healthy living environment.

This post explains what MVHR servicing involves, why it matters, and how to keep your system running efficiently. Whether you are a homeowner, property manager, or builder, understanding MVHR servicing will help you protect your investment and enjoy the benefits of clean, fresh air.

Detailed view of MVHR system components during maintenance

Close-up view of an MVHR unit's internal components showing filters and heat exchanger

What Is MVHR Servicing?

MVHR servicing refers to the routine inspection, cleaning, and maintenance of a mechanical ventilation system with heat recovery. The goal is to ensure the system operates efficiently, safely, and quietly. Servicing typically includes:

• Checking and replacing air filters

• Cleaning the heat exchanger core

• Inspecting and cleaning ductwork and vents

• Testing fans and controls

• Checking for leaks or blockages

• Verifying system settings and airflow rates

  
  

Regular servicing helps prevent breakdowns, maintains air quality, and extends the lifespan of the system.

Why MVHR Servicing Is Essential

Maintaining Air Quality

MVHR systems continuously circulate air throughout a property. Over time, dust, pollen, and other pollutants can accumulate in filters and ducts. If not cleaned, these contaminants reduce air quality and may cause allergies or respiratory issues.

Energy Efficiency

The heat exchanger recovers warmth from outgoing air to preheat incoming fresh air. Dirt and debris on the heat exchanger reduce its ability to transfer heat, leading to higher energy bills. Servicing restores efficiency and saves money.

Preventing System Failures

Mechanical parts like fans and motors wear down without proper care. Servicing identifies worn components early, preventing costly repairs or replacements.

Compliance and Warranty

Some manufacturers require regular servicing to keep warranties valid. Additionally, building regulations or insurance policies may mandate maintenance records.

How Often Should You Service Your MVHR System?

The frequency of servicing depends on the system type, usage, and environment. General guidelines include:

• Filter checks: Every 3 to 6 months

• Full servicing: Annually or every 12 months

• Duct cleaning: Every 3 to 5 years, or sooner if needed

  
  

Properties in dusty or polluted areas may require more frequent attention. Always follow the manufacturer’s recommendations.

Step-by-Step Guide to MVHR Servicing

1. Turn Off the System

Before starting any maintenance, switch off the MVHR unit and isolate power to ensure safety.

2. Inspect and Replace Filters

Filters trap dust and particles. Remove them and check for dirt buildup. Replace disposable filters or clean reusable ones according to instructions.

3. Clean the Heat Exchanger

Remove the heat exchanger core carefully. Use a vacuum or soft brush to clear dust and debris. Avoid using water unless specified by the manufacturer.

4. Check and Clean Ductwork

Inspect accessible ducts for dust, mold, or blockages. Clean with appropriate tools or hire professionals for thorough duct cleaning.

5. Test Fans and Controls

Turn the system back on and listen for unusual noises. Check that fans run smoothly and controls respond correctly.

6. Verify Airflow Rates

Use an anemometer or airflow meter to measure supply and extract air volumes. Adjust settings if airflow is below recommended levels.

7. Document the Service

Record the date, work done, and any issues found. Keep this log for warranty and compliance purposes.

Common MVHR Servicing Issues and Solutions

• Clogged filters: Replace regularly to avoid airflow reduction.

• Dirty heat exchanger: Clean annually to maintain heat recovery efficiency.

• Noisy fans: Lubricate or replace worn bearings.

• Blocked ducts: Schedule professional duct cleaning if dust or mold is present.

• Incorrect airflow: Adjust settings or repair leaks in ductwork.

  
  

DIY vs Professional Servicing

Some tasks like filter replacement and basic cleaning can be done by homeowners. However, professional servicing is recommended for:

• Heat exchanger cleaning

• Ductwork inspection and cleaning

• Electrical and mechanical checks

• Airflow measurement and balancing

  
  

Professionals have the right tools and expertise to ensure thorough maintenance and identify hidden problems.

Tips for Extending MVHR System Life

• Change filters on schedule

• Keep vents and grilles clean and unobstructed

• Avoid smoking or burning candles indoors to reduce pollutants

• Schedule annual professional servicing

• Monitor system performance and address issues promptly

  
  

The Benefits of Well-Maintained MVHR Systems

A properly serviced MVHR system offers:

• Consistent fresh air supply

• Reduced energy costs through effective heat recovery

• Lower risk of mold and dampness

• Improved comfort and health for occupants

• Longer system lifespan and fewer repairs

  
  
  
  

Maintaining your MVHR system is essential to enjoy clean air and energy savings. Regular servicing keeps the system efficient and reliable, protecting your property and health. If you are unsure about servicing tasks, consult a qualified technician to ensure your system receives the care it needs.

Take action today by scheduling your next MVHR service or checking your filters. Your property and well-being will thank you.