Glossary - VENTI (A Coastal Group brand)

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Building Regulations, Standards and Legislation

35

Are there any changes to the regulations planned between now and 2025?
Can I Convert a Cellar Without Planning Permission?
What is BS 5925:1991 Code of practice for ventilation principles and designing for natural ventilation?
What is BS EN 13141 Ventilation for buildings standard?
What is BS EN 13142:2021 (formerly BS EN 15665)?
What is the Homes (Fitness for Human Habitation) Act 2018 (HFA 2018)?
What is the minimum ventilation rates needed for a utility room?
Approved Document F: Volume 1: (Means of ventilation) Dwellings
Approved Document L: Volume 1: (Conservation of fuel and power) Buildings other than dwellings
- What is the minimum heat cell efficiency change from the amended Approved Document L?
BS 3632:2023 - Residential park homes - Specification
- How does the AUREN meet the requirements of BS 3632:2023 – Residential park homes?
- What is BS 3632:2023 Residential Park Homes Standard?

Clean Air Movement

32

Are fresh air supply units necessary if I have air conditioning?
Are Fresh Air Supply Units Necessary If Windows and Doors Can Be Opened for Ventilation?
How can I test my CO2 levels at home?
How to Check CO2 Levels in Your Home
What Causes Condensation?
What Health Issues Can Poor Ventilation Cause?
What is Clean Air?
What is the ideal relative humidity (RH) in our homes?
What is the relationship between CO2 levels and cognitive performance?
What Role Does Ventilation Play in Indoor Health?
Why is mould a significant health risk?
Why is there a vent in my bedroom?
Awaab's Law
Ella's Law

Glossary

169

What are Acoustics?
What are Air Changes per Hour (ACH)?
What are Airflow Rates?
What are Bioeffluents?
What are Building Regulations?
What are Capital Works?
What are Carbon Credits?
What are Carbon Emissions?
What are Communal Areas?
What are Day-to-Day Repairs?
What are Decibels (dB)?
What are Dust Mites?
What are Energy Related Products (ERP)?
What are Green Heating Products?
What are In-house Repairs?
What are Nitrogen Oxides (NOx)?
What are VOCs?
What does Continuous Operation Mean?
What is a Back Draught Shutter?
What is a Background Ventilator?
What is a Balanced System?
What is a Basement?
What is a Bathroom Fan?
What is a Bathroom Zone?
What is a Blower Door Test?
What is a Carbon Footprint?
What is a Cellar?
What is a Centrifugal Fan?
What is a Circuit Breaker?
What is a Combustion Appliance?
What is a Condensate Drain?
What is a Condensation Trap?
What is a Constant Live?
What is a Decant?
What is a Decentralised Heat Recovery Unit (dHRU)?
What is a Deep Retrofit?
What is a Degree Day?
What is a Diffuser Grille?
What is a Domestic Ventilation Strategist?
What is a Domestic Ventilation Strategy?
What is a Fabric First Approach?
What is a Fan Speed Controller?
What is a Filter?
What is a Fixed Louvre?
What is a Freeholder?
What is a Fresh Air Intake (FAI)?
What is a Gravity Grille?
What is a Grease Filter?
What is a Grille?
What is a Ground Source Heat Pump (GSHP)?
What is a Habitable Room? (UK Building Regulations Explained)
What is a Hazard Awareness Notice?
What is a Heat Pump?
What is a HEPA Filter?
What is a Humidistat?
What is a Residual Current Device (RCD)?
What is a Shallow Retrofit?
What is a Ventilation Duct?
What is a Ventilation Strategy Report?
What is a Void Property?
What is a Wall-Mounted PIV?
What is a Whole House Retrofit (WHR)?
What is a Y-Piece?
What is Acoustic Attenuation?
What is Adventitious Ventilation?
What is Air Permeability?
What is Air Purification?
What is Airflow?
What is Airtightness?
What is Alternate-Flow Heat Recovery (AFHR) Ventilation?
What is an Air Source Heat Pump (ASHP)?
What is an Airflow Path?
What is an Axial Fan?
What is an Emergency Repair?
What is an Energy Audit?
What is an Energy Performance Certificate (EPC)?
What is an Energy Recovery Ventilator (ERV)?
What is an External Louvre?
What is an Extractor Fan?
What is an Impeller?
What is Asset Management?
What is Average Annual Humidity (AAH)?
What is Awaab’s Law?
What is Back Draught?
What is Background Ventilation?
What is Backlog Management?
What is Block Management?
What is Boost Speed?
What is BS 3632:2023 Residential Park Homes Standard?
What is Carbon Dioxide (CO₂)?
What is Carbon Monoxide (CO)?
What is Cavity Wall Insulation (CWI)?
What is Clean Air?
What is Commissioning?
What is Community Heating?
What is Condensation?
What is Continuous Mechanical Extract Ventilation (cMEV)?
What is Continuous Mechanical Supply and Extract with Heat Recovery?
What is Continuous Ventilation?
What is Corrective Maintenance?
What is Cyclical Maintenance?
What is Damp Proofing?
What is Damp?
What is Decarbonisation?
What is Decentralised Heat Recovery Ventilation (DHRV)?
What is Decentralised Mechanical Ventilation with Heat Recovery (dMVHR)?
What is Demand-controlled Mechanical Extract Ventilation (dMEV)?
What is Double Glazing?
What is Draught Proofing?
What is Ductless MVHR (dMVHR)?
What is Ella’s Law?
What is Energiesprong?
What is EnerPHit?
What is Estate Management?
What is External Wall Insulation (EWI)?
What is Extract Ventilation?
What is Fabric Maintenance?
What is Filtration?
What is Flat Roof Insulation?
What is Floor Insulation?
What is Forced Ventilation?
What is Formaldehyde?
What is Free Air?
What is Green Finance?
What is Gross Space Heating?
What is Heat Loss?
What is Heat Recovery Ventilation (HRV)?
What is Heat Recovery?
What is Humidity Control?
What is Humidity?
What is HVAC?
What is Interstitial Condensation?
What is Positive Input Ventilation (PIV)?
What is Radon (Rn)?
What is Switched Live?
What is System 1?
What is the Air Exchange Rate (AER)?
What is the Air Leakage Rate (A-Value)?
What is the Approved Document B(1) (Part B)?
What is the Approved Document F(1) (Part F)?
What is the Approved Document L(1) (Part L)?
What is the Approved Document O (Part O)?
What is the Boiler Upgrade Scheme (BUS)?
What is the CIBSE Guide B2: Ventilation and Air Conditioning?
What is the Coefficient of Performance (CoP)?
What is the Decent Homes Standard?
What is the Department for Energy Security and Net Zero (DESNZ)?
What is the Dew Point?
What is the Earth Wire?
What is the Energy Company Obligation Scheme (ECO)?
What is the Energy Efficiency Rating (EER)?
What is the Energy Star?
What is the Equivalent Area (EA)?
What is the Extraction Rate?
What is the Free Area?
What is the Gross Internal Area (GIA)?
What is the Heat Loss Coefficient (HLC)?
What is the High Rate?
What is the Homes (Fitness for Human Habitation) Act 2018 (HFA 2018)?
What is the Neutral Wire?
What is the Warm Homes: Social Housing Fund (WHSHF)?
What is the Window Energy Rating?
What is the Winter Design Temperature?
What is Ventilation?
What is VMC Double Flux? (Ventilation Mécanique Contrôlée avec Récupération de Chaleur)
What is Whole Dwelling Ventilation?
What is WRG (Wärmerückgewinnung)?
What is WTW (Warmteterugwinning)?
What is Year-Round Ventilation?

Housing Archetypes

8

Edwardian Terrace
Georgian Townhouse
How Are Ventilation Regulations Applied to Listed and Specialist Dwellings?
Victoria Terrace House with Persistent Condensation
Victorian End Terrace
Victorian Mid-Terrace House
Victorian Semi-Detached House
Victorian Terrace House

Mechanical Ventilation Approaches

36

Can a recirculating extract work with FLUXO MVHR units in areas without direct kitchen extracts?
What considerations need to be made whilst designing a building to ensure a neat integration of ventilation systems, without it looking like an afterthought add-on?
What is the Minimum Ventilation Rate Needed for a Kitchen?
What is the Optimal RIBA Stage for Engaging a Domestic Ventilation Specialist?
Centralised Extract Ventilation
- Can ARIA units be used individually in wet room areas?
- Why Are Trickle Vents Necessary for MEV/cMEV?
Centralised Heat Recovery Ventilation (MVHR)
Decentralised Extract Ventilation
Decentralised Heat Recovery Ventilation
- VENTI AUREN
- VENTI FLUXO
  - How Should the FLUXO Units Be Positioned for Optimal Airflow?
Positive Input Ventilation (PIV)
Subfloor Ventilation
- What size mechanical fan do I need to keep my subfloor dry and compliant with UK building regs?

Natural Ventilation Approaches

34

What is the difference between Equivalent Area (EA) and Geometric Free Area?
Why is uncontrolled infiltration not sufficient for ventilation?
Background Ventilation (Passive)
Passive Stack Ventilation (PSV)

Other Resources

6

Calculators
Quizzes
- How Much Do You Know About Trickle Vents? (QUIZ)

Purge Ventilation

2

What is the fraction of floor area that is required for purge ventilation in a window?
What is the Minimum Purge Rate (Airflow) that I need for a Habitable Room?

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Glossary

Glossary

What is a Balanced System?
What is a Basement?
What is a Bathroom Fan?
What is a Bathroom Zone?
What is a Blower Door Test?
What is a Carbon Footprint?
What is a Cellar?
What is a Centrifugal Fan?
What is a Circuit Breaker?
What is a Combustion Appliance?

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Why VENTI

VENTI is a leading supplier of residential ventilation systems in the UK. We help provide and full-service solution for your property or housing stock. At each stage we offer a designs and quotations with installations offered, where needed.

We’re here to support you every step of the way. If you have any questions or need assistance, feel free to reach out to our friendly customer support team. We are dedicated to providing you with exceptional service and ensuring your satisfaction with our products.

Do you need help solving condensation and mould issues in your home?

Or to find out more about how we advise on Reactive Maintenance, Retrofit & Renovation and New-build developments. Contact us today and one of our team will be in touch

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VENTI Group

VENTI Residential Ventilation Solutions

Head Office: Global House, Bojea Industrial Estate, St Austell, Cornwall, PL25 5RJ, UK

Distribution Centre: Units 5, 7, & 8, Wheal Northey Industrial Estate, St Austell, Cornwall, PL25 3EF, UK

London Brand Centre: 273 Abbeydale Road, Wembley, London, HA0 1TW, UK

VENTI is a leading supplier of residential ventilation systems, based in Cornwall, UK. We provide a full-service continuous mechanical ventilation solution for your home or housing stock.

> Why don’t trickle vents work? What is the alternative?

© 2025 VENTI Group, Global House, Bojea Industrial Estate, St Austell, Cornwall PL25 5RJ

VENTI Group is a subsidiary of Future Form Holdings, and a brand of Coastal Specialist Ironmongery. Coastal Specialist Ironmongery Ltd Registration Number – 6770364.

Useful Links | Sitemap | The Clean Air Movement | Glossary | Calculators | Approved Document F Vol 1 | Knowledge Hub | MVHR

Winner: Best Residential Ventilation Systems Supplier 2025 and 2026
Winner: Building Regulation Compliance Excellence Award 2025

Winner: Best Residential Ventilation Solutions Provider 2026 – UK
Winner: BUILD Client Service Excellence Award 2026

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