Impellor
An impellor (also spelt impeller) is a bladed rotor, most often used to describe an apparatus used to increase pressure and flow of fluids. It is also the term used to describe the central bladed component of a fan which is used to increase pressure and flow of air. In general there are axial impellors, which increase flow on the same axis as the incoming flow feed and centrifugal impellors, which increase flow at an angle to the incoming flow (normally 45 degrees).
Impellors are a key component of any pump system and can have a variety of designs, they are the opposite of a turbine which extracts energy from a flowing fluid or gas and this reduces its pressure in the process. Types of impellors found in pump systems might include; open, semi-open, closed, vortex and cutter impellors.
[edit] Related articles on Designing Buildings
- Air conditioning.
- Air handling unit.
- Building management systems.
- Building services
- Building services engineer.
- Chilled water fan coil system vs refrigerant based system
- Constant air volume CAV
- Evaluation of cooling effects: outdoor watermist fan
- Fan.
- Fan coil refurbishment for improved operational efficiency
- Fan coil unit
- Fan coils
- Fan convector
- Fan heater
- How do I know what capacity fan coil I need?
- How does a chilled water fan coil unit work?
- HVAC
- Intermittent extract fan
- Types of pump.
- Types of fan.
- Variable air volume VAV
- Ventilation
- What are the different types of fan coil units?
Featured articles and news
Design and construction industry podcasts
Professional development, practice, the pandemic, platforms and podcasts. Have we missed anything?
C20 Society; Buildings at Risk List 2025
10 more buildings published with updates on the past decade of buildings featured.
Boiler Upgrade Scheme and certifications consultation
Summary of government consultation, closing 11 June 2025.
Deputy editor of AT, Tim Fraser, discusses the newly formed society with its current chair, Chris Halligan MCIAT.
Barratt Lo-E passivhaus standard homes planned enmasse
With an initial 728 Lo-E homes across two sites and many more planned for the future.
Government urged to uphold Warm Homes commitment
ECA and industry bodies write to Government concerning its 13.2 billion Warm Homes manifesto commitment.
From project managers to rising stars, sustainability pioneers and more.
Places of Worship in Britain and Ireland, 1929-1990. Book review.
The emancipation of women in art.
Call for independent National Grenfell oversight mechanism
MHCLG share findings of Building Safety Inquiry in letter to Secretary of State and Minister for Building Safety.
The Architectural Technology Awards
AT Awards now open for this the sixth decade of CIAT.
50th Golden anniversary ECA Edmundson awards
Deadline for submissions Friday 30 May 2025.
The benefits of precast, off-site foundation systems
Top ten benefits of this notable innovation.
Encouraging individuals to take action saving water at home, work, and in their communities.
Takes a community to support mental health and wellbeing
The why of becoming a Mental Health Instructor explained.
Mental health awareness week 13-18 May
The theme is communities, they can provide a sense of belonging, safety, support in hard times, and a sense purpose.
Mental health support on the rise but workers still struggling
CIOB Understanding Mental Health in the Built Environment 2025 shows.
Design and construction material libraries
Material, sample, product or detail libraries a key component of any architectural design practice.