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What is EnerPHit?
Last Updated: 2 September 2025EnerPHit is a certification standard developed by the Passive House Institute (PHI) for retrofitting existing buildings to achieve near-Passive House levels of energy efficiency. It combines rigorous energy performance criteria with practical retrofit strategies, focusing on reducing heat loss, improving airtightness, and optimising ventilation. EnerPHit is particularly relevant in the UK residential retrofit sector, where...
Edwardian Terrace
Last Updated: 2 September 2025Can Edwardian Terraces Ever Breathe Properly? Edwardian terraces are some of the most charming homes in England. Their high ceilings, decorative fireplaces and solid brick walls carry history in every brick. But what they also carry—often unnoticed—is stale, damp and polluted air. Ventilation is not just a modern concern. It’s the quiet backbone of healthy...
What Percentage of Dwellings in England Had a Damp Problem in 2023?
Last Updated: 2 September 2025In 2023, 5% of dwellings in England reported a problem with damp, marking the highest percentage in the last five years, compared to the previous range of 3-4%. This increase highlights growing concerns about housing quality and ventilation in the UK. Understanding the Damp Crisis in England Damp is a pervasive issue in the UK,...
Whole Dwelling Ventilation Rate Calculator
Last Updated: 4 September 2025The ventilation calculator is intended for general informational purposes only, generating results based on user inputs, standard parameters, and assumptions. It is not a substitute for professional advice, engineering assessments, or site-specific considerations. For a more accurate ventilation assessment and proposal tailored to your property, we recommend using VENTI’s ventilation strategy service. The creators of...
Airflow Rates Conversion Calculator
Last Updated: 4 September 2025Looking for a fast and accurate way to convert airflow rates? Our online Airflow Rates Conversion Calculator is designed to help you effortlessly switch between Litres per Second (l/s) and Cubic Metres per Hour (m³/hr). Whether you’re an HVAC professional, an engineer, or a student, our tool provides instant, reliable conversions to streamline your work....
Can I block up my trickle vents?
Last Updated: 16 September 2025No, it’s not a good idea. Blocking trickle vents can lead to poor indoor air quality, increased humidity, and mould growth. Trickle vents are designed to ensure a continuous flow of fresh air, which helps prevent condensation and damp issues in your home. Understanding Trickle Vents Trickle vents are small, adjustable openings fitted in window...
Do trickle vents actually work?
Last Updated: 16 September 2025Yes, trickle vents can provide some ventilation, but they often fall short in effectiveness. Many homeowners close them, leading to issues like damp and mould. Additionally, they can introduce unwanted drafts and noise, making alternative systems like mechanical ventilation more appealing for consistent air quality. Understanding Trickle Vents Trickle vents are small openings installed in...
Are MVHR units noisy?
Last Updated: 2 September 2025Mechanical Ventilation with Heat Recovery (MVHR) units can produce noise, but the level of noise largely depends on the design, installation, and quality of the unit. In the UK, Building Regulations Part F sets noise limits at 30 dB LAeq,T for bedrooms and living rooms, and 35 dB LAeq,T for kitchens and bathrooms. Proper installation,...
Victoria Terrace House with Persistent Condensation
Last Updated: 2 September 2025The Condensation Conundrum: How Can We Ventilate Victorian Terraces in England? There’s nothing quite like the timeless elegance and character of a Victorian terrace. With their high ceilings, ornate cornices, and sturdy brickwork, these homes are a cherished part of our nation’s housing stock. But for all their charm, the specific design of this unique...
What is Ventilation?
Last Updated: 1 September 2025The intentional supply of outdoor air to, and extraction of indoor air from, a dwelling to dilute and remove pollutants (moisture, CO₂, VOCs, odours, combustion by-products) while supporting occupant health, limiting condensation risk, and maintaining energy efficiency in line with Building Regulations Part F requirements for means, rates and control of ventilation in domestic buildings...