The following explanations are not intended as technical definitions, but rather are intended to assist the reader in understanding certain terms used on the website.

A

AC blowers

A low-pressure fan with an AC motor.

AHU

A ventilation device which usually integrates air, heating and filtration into one combined unit. May also include cooling and heat recovery.

Alternating current or AC

The flow of electric current which reverses direction periodically, typically at 50Hz in the UK and Europe. This is the standard type of electricity supply to domestic and commercial properties.

D

Decentralised heat recovery

A system of ventilation that collects heat from exhaust air that would otherwise be lost and reuses such heat by transferring it to the incoming fresh air. Decentralised heat recovery consists of multiple units supplying and extracting from around the home

E

EC/DC

Electronically commutated direct current

Electronically commutated’ or ‘EC

A type of motor which historically used a mechanical means of reversing the current flow but which now uses an electronic device to do the same, which is more reliable and more efficient

F

Fan coil

A device used to heat or cool a space which includes a water coil and fan for connection to the wider HVAC package within a building

H

HVAC

Heating, ventilation and air conditioning

Hybrid ventilation

A method that combines both passive and mechanical means to form a mixed mode ventilation system

I

IAQ

Indoor air quality

L

Lo-Carbon Products

A trademark used to represent our low-energy range of products;

M

MEV

Mechanical Extract Ventilation: a system of ventilation operated by a power-driven mechanism which extracts air from a room and discharges it only to the external air

MVHR

Mechanical Ventilation with Heat Recovery: a centralised system of ventilation that collects heat from exhaust air that would otherwise be lost and re-uses such heat by transferring it to the incoming fresh air

Motorised impellers

A motor that is supplied complete with an impeller attached to it

N

NVHR

Natural ventilation with heat recycling

O

OEM

Original equipment manufacturer

P

Plate heat exchanger

A type of heat exchanger consisting of a series of plates which transfer the heat from one airstream to another

R

RMI

Repair, maintenance and improvement

Rotary heat exchanger

A type of heat exchanger consisting of a circular honeycomb matrix which rotates in the air stream of a heat recovery device

S

Specifiers

Persons who may specify certain characteristics of products