SIST EN 13053:2007/kFprA1:2011

Ventilation for buildings - Air handling units - Rating and performance for units, components and sections

To amend EN to address issues regarding energy classification of Air Handling Units as a result of discussions in Eurovent WG6C.

Lüftung von Gebäuden - Zentrale raumlufttechnische Geräte - Leistungskenndaten für Geräte, Komponenten und Baueinheiten

Ventilation des bâtiments - Caissons de traitement d'air - Classification et performance des unités, composants et sections

Prezračevanje stavb - Klimati - Ocenitev in lastnosti klimatov, sestavnih delov in sekcij

General Information

• Status: Not Published
• Public Enquiry End Date: 10-Apr-2011
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 28-Sep-2016
• Due Date: 03-Oct-2016
• Completion Date: 28-Sep-2016
• Ref Project: EN 13053:2006/FprA1 - Ventilation for buildings - Air handling units - Rating and performance for units, components and sections

Relations

• Consolidated By: SIST EN 13053:2007+A1:2011 - Ventilation for buildings - Air handling units - Rating and performance for units, components and sections
• Effective Date: 01-Oct-2011
• Revised: SIST EN 13053:2007 - Ventilation for buildings - Air handling units - Rating and performance for units, components and sections
• Effective Date: 01-Apr-2011

Overview

EN 13053:2006/FprA1 (CEN) is an amendment to the European standard EN 13053 for ventilation for buildings - air handling units (AHU). The amendment focuses on energy-related characteristics and improves the energy classification of AHUs following discussions in Eurovent WG6C. It updates fan-section requirements, defines air velocity and fan power consumption classes, and adds an informative Annex B on heat recovery characteristics, efficiencies and auxiliary energy evaluation.

Key Topics

• Air velocity classes (fan section)
  The standard defines average air velocity classes inside the AHU casing (V1–V9). Common application ranges are V2 to V7, and lower velocities are recommended to reduce energy consumption.

  • Example classes: V1 ≤ 1.6 m/s, V2 >1.6–1.8 m/s, … V9 >3.6 m/s.

• Fan power consumption and classes
  Clause 6.3.2 provides a reference method to calculate a fan’s reference power (Pm) from fan-section static pressure (Δp) and airflow (q). Drives are grouped into power classes P1–P7 defined relative to Pm (e.g., P2 ≤ Pm × 0.90, P4 ≤ Pm × 1.00). Values are based on nominal conditions (air density 1.2 kg/m³).

• Heat recovery system (HRS) rating
  Clause 6.5.2 and the new Annex B define:

  • Temperature efficiency (ηt) under dry conditions: ηt = (t'' − t') / (t' − t1').
  • Pressure loss and how it affects auxiliary electric consumption.
  • Coefficient of performance (ε) = QHRS / Pel and combined energy efficiency (ηe) = ηt × (1 − 1/ε).
  • Heat recovery classes H1–H6 (e.g., H1 ≥ 71%, H3 ≥ 55%, H5 ≥ 36%) for balanced mass flows (1:1).

• Auxiliary energy and yearly views
  Annex B explains how to account for pumps and fans in electrical power calculations and how to translate instantaneous efficiencies into yearly/primary-energy performance metrics.

Applications

• AHU manufacturers: specifying product performance, declaring velocity and fan power classes, and documenting heat recovery performance.
• HVAC designers and consulting engineers: selecting units that meet energy targets, optimizing fan velocities and HRS class for building energy models.
• Energy assessors and facility managers: comparing AHU options based on standardized efficiency metrics and estimating annual energy impacts.
• Test labs and certification bodies: applying the defined classes and measurement bases when rating units.

Related Standards

• EN 13053:2006 (base standard) - amended by FprA1
• EN 308 - referenced for basic test conditions for heat recovery performance

Keywords: EN 13053, air handling units, AHU, heat recovery, energy classification, fan power, ventilation for buildings, CEN, Eurovent, HVAC.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2011
3UH]UDþHYDQMHVWDYE.OLPDWL2FHQLWHYLQODVWQRVWLNOLPDWRYVHVWDYQLKGHORYLQ
VHNFLM
Ventilation for buildings - Air handling units - Rating and performance for units,
components and sections
Lüftung von Gebäuden - Zentrale raumlufttechnische Geräte - Leistungskenndaten für
Geräte, Komponenten und Baueinheiten
Ventilation des bâtiments - Caissons de traitement d'air - Classification et performance
des unités, composants et sections
Ta slovenski standard je istoveten z: EN 13053:2006/FprA1
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 13053:2006
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA1
November 2010
ICS 91.140.30
English Version
Ventilation for buildings - Air handling units - Rating and
performance for units, components and sections
Ventilation des bâtiments - Caissons de traitement d'air - Lüftung von Gebäuden - Zentrale raumlufttechnische
Classification et performance des unités, composants et Geräte - Leistungskenndaten für Geräte, Komponenten und
sections Baueinheiten
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 156.
This draft amendment A1, if approved, will modify the European Standard EN 13053:2006. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13053:2006/FprA1:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Modification to 6.3, Fan section .4
2 Modification to 6.5.2, Classifications and requirements .5
3 Addition of Annex B .7

Foreword
This document (EN 13053:2006/FprA1:2010) has been prepared by Technical Committee CEN/TC 156
“Ventilation for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the Unique Acceptance Procedure.
Introduction
The aim of this amendment is to modify the essential energy-related characteristics of air handling units, and
to give additional information to enable a better and more practical energy classification.
1 Modification to 6.3, Fan section
In 6.3.1, replace Table 4 with the following:
"
Table 4 — Classes of average air velocity levels inside the casing
Class Air velocity
m/s
Class V1 maximum 1,6
Class V2 > 1,6 to 1,8
Class V3 > 1,8 to 2,0
Class V4 > 2,0 to 2,2
Class V5 > 2,2 to 2,5
Class V6 > 2,5 to 2,8
Class V7 > 2,8 to 3,2
Class V8 > 3,2 to 3,6
Class V9 > 3,6
NOTE The air velocity in the unit has a large influence on
energy consumption. The velocities are calculated for air
velocity in AHU cross-section. The velocity is based on the
square area of filter section of a unit, or if no filter is installed,
it is based on the square area of the fan section.
".
Add below Table 4, a NOTE 2 and replace "NOTE" with "NOTE 1".
"NOTE 2 Common velocity classes are V2 to V7 dependant on application. To reduce energy consumption it is strongly
recommended to reduce the velocity.".
Add a new subclause 6.3.2, Power consumption of fans as follows:
"
6.3.2 Power consumption of fans
The power consumption of drives can be defined in classes. The maximum power consumption has to be
calculated by the following equation:
0,925 0,95
Pm = (∆p / 450) × (q + 0,08) (6)
ref stat v
where
Pm is the reference power consumption, [kW];
ref
∆p is the static pressure to be measured at the fan section, [Pa];
stat
q is the air flow of the fan, [m3/h].
v
Table 5 defines the power consumption (Pm ) classes:
max
Table 5 — Classes of power consumption of drives (fans)
Class P max [kW]
m
Class P1
≤ Pm × 0,85
ref
Class P2
≤ Pm × 0,90
ref
Class P3 ≤ Pm × 0,95
ref
Class P4
≤ Pm × 1,00
ref
Class P5
≤ Pm × 1,06
ref
Class P6 ≤ Pm × 1,12
ref
Class P7
> Pm × 1,12
ref
Each fan shall be specified in the power
consumption classes. All values are based on
nominal conditions with a density of 1,2 kg/m³.
NOTE 1 The power consumption is the useful power supplied from the mains (including any motor control equipment).
NOTE 2 Common power consumption classes are P2 to P5 dependant on application.".
2 Modification to 6.5.2, Classifications and requirements
Replace Table 5 and the text below including Table 6 with the following:
"The following characteristic values define the thermal efficiency of a heat recovery system (HRS) under
balanced mass flows conditions (1:1). The following values shall be indicated.
NOTE 1 For further information see Annex B.
Temperature efficiency (η ) under dry condition:
t
η = (t ´´- t ´) / (t ´- t ´) (7)
t 2 2 1 2
where
t ´´ is the temperature of the supply air, [°C];
t ´ is the temperature of the outside air, [°C];
t ´ is the temperature of the exhaust air, [°C].
Pressure losses of the heat recovery system
∆p ∆p + ∆p (8)
HRS = Supply Exhaust
where
∆p is the sum of pressure losses, supply and exhaust, of the HRS, [Pa];
HRS
∆p is the pressure loss of the HRS supply air, [Pa];
Supply
∆p is the pressure loss of the HRS exhaust air, [Pa].
Exhaust
NOTE 2 All HRS based pressure changes have to be considered (e.g. add. filters).
Electric power consumption (P ) based on pressure losses:
el
P = q × ∆p × 1 / η + P (9)
el v HRS D el aux.
with
q is the air flow, in m³/s (standard density of 1,2 kg/m³);
v
η  is the 0,6 average overall static efficiency of power consumption, [./.];
D
P is the auxiliary electric power consumption (e.g. pumps, etc.), [kW].
el aux.
NOTE 3 All electric power consumptions influenced by the thermal capacity of HRS should be considered (e.g. water
pumps).
NOTE 4 P for pumps: P = q × ∆p × 1 / η
el aux. el Pump v HRS media D
Coefficient of performance (ε):
/ P (10)
ε = Q
HRS el
Energy efficiency (η ):
e
η = η × (1 – 1 / ε) (11)
e t
The combined values (ε, φ and η) shall be indicated by the following basic conditions
...