Mechanical Ventilation and Heat Recovery
Improve indoor air quality, cut heating costs and enjoy year round comfort with expertly designed and installed mechanical ventilation and heat recovery (MVHR) systems from industry certified experts Dawson Mechanical and Renewables.
Mechanical Ventilation and Heat Recovery Specialists
Dawson Mechanical and Renewables are specialist installers of mechanical ventilation with heat recovery (MVHR) systems throughout Dublin and Meath. MVHR is essential for modern airtight homes, providing continuous fresh air while recovering heat from extracted stale air, reducing heating costs and maintaining excellent indoor air quality.
Whether you’re building a new energy efficient home with renewable heating, undertaking an extension, or managing a commercial development project, proper mechanical ventilation is a Building Regulations requirement (Part F) and a crucial element of overall building performance. Our experienced team designs, installs, and commissions MVHR systems for residential and commercial properties, ensuring optimal indoor air quality and energy efficiency
for years to come.
What Is Mechanical Ventilation and Heat Recovery (MVHR)?
Mechanical Ventilation with Heat Recovery (MVHR) is a whole house ventilation system that extracts stale, humid air from wet rooms (bathrooms, kitchens, utility rooms) and supplies fresh, filtered air to living areas (bedrooms, living rooms, dining rooms).
The MVHR unit transfers heat from extracted warm air to incoming cold fresh air, recovering up to 95% of heat that would otherwise be lost. This dramatically reduces heating demand compared to traditional ventilation
methods like extractor fans or trickle vents. MVHR is particularly important in modern well-insulated, airtight homes where natural ventilation is insufficient. It works perfectly alongside energy-efficient heating systems like heat pumps and underfloor heating. there are many additional benefits including:
- Consistent supply of fresh, clean air
- Reduced heat loss and lower energy bills
- Improved indoor air quality
- Reduced condensation and mould growth
- Enhanced comfort all year round
Our Mechanical Ventilation and Heat Recovery Services
We cover a detail service options for MVHR systems, this is what we provide:
MVHR System Design
We provide professional MVHR system design based on your building layout, occupancy, and ventilation requirements. Our designs comply with current building regulations and energy‑efficiency standards.
MVHR Installation
Our experienced engineers install high‑performance MVHR systems with minimal disruption. We work with leading manufacturers to ensure reliable, quiet, and energy‑efficient operation.
MVHR Maintenance & Servicing
Regular MVHR servicing keeps your system running efficiently and hygienically. Our maintenance services include filter replacement, airflow checks, system cleaning, and performance testing.
MVHR Repairs & Fault Finding
If your MVHR system is noisy, inefficient, or not working correctly, we provide fast diagnostics and repairs to restore optimal ventilation and heat recovery.
MVHR Upgrades & Replacements
We upgrade outdated or inefficient ventilation systems to modern MVHR solutions, improving air quality and reducing energy consumption.
Why Choose Us for Mechanical Ventilation and Heat Recovery?
To set yourself up for success use these tips:
- MVHR specialists with proven experience
- Fully compliant with building regulations
- Energy‑efficient, high‑quality systems
- Professional installation and aftercare
- Competitive pricing and transparent quotes
Frequently Asked Questions
Choosing the right mechanical ventilation and heat recovery system can raise a few questions. We’ve answered the most common queries below to help you understand how MVHR works and whether it’s right for your property.
Yes. While MVHR is ideal for new builds and airtight properties, it can also be retrofitted to existing homes with the right design.
Filters should typically be checked every 3–6 months and replaced annually. Full servicing is recommended at least once a year.
MVHR systems use electricity to run fans, but the heat recovered usually outweighs the running costs, resulting in net energy savings.
A mechanical ventilation and heat recovery (MVHR) system works by extracting warm, stale air from moisture-producing rooms and using a heat exchanger to transfer that heat to fresh incoming air. This process provides continuous ventilation while significantly reducing heat loss and improving energy efficiency.
MVHR systems are very energy efficient and typically have low running costs. While they use electricity to operate the fans, the heat recovered from extracted air often results in overall heating cost savings, especially in well-insulated and airtight buildings.
In many new-build and airtight properties, mechanical ventilation and heat recovery systems help meet current building regulations by ensuring adequate ventilation and energy efficiency. MVHR is commonly used to comply with ventilation and indoor air quality requirements.
Yes. MVHR systems improve indoor air quality by continuously filtering incoming air and removing dust, pollen, and airborne pollutants. This can help reduce allergy symptoms and create a healthier indoor environment for occupants with asthma or respiratory sensitivities.
A well-designed and properly maintained MVHR system can last 15–25 years. Regular servicing, filter changes, and professional maintenance are key to maximising lifespan and maintaining efficient performance.
Yes. Mechanical ventilation and heat recovery systems are designed to operate efficiently all year round. In colder months, they recover heat to reduce heating demand, while in warmer months they help manage fresh airflow without excessive heat gain.
Standard mechanical ventilation extracts stale air but does not recover heat, leading to higher heat loss. Mechanical ventilation and heat recovery systems, however, reuse heat from extracted air, making them far more energy efficient and cost-effective in the long term.
Our Qualifications
We strictly adhere to the highest industry standards and comply with all health and safety regulations to ensure every job is carried out safely, legally, and to the highest quality. Our commitment to continuous training and certification means you can trust us to deliver expert plumbing and heating solutions and services including RGI and the national guild of master craftsmen.
Book a Mechanical Ventilation and Heat Recovery Consultation
Ready to improve your indoor air quality and energy efficiency? Contact us today to discuss your Mechanical Ventilation and Heat Recovery (MVHR) requirements. Our team will provide expert advice, a tailored design, and a competitive quote.