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HASMAN AEROSEALDUCTWORK LEAKAGE SEALING SOLUTION
2 THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
WHAT IS AEROSEAL?
AEROSEAL is a breakthrough
technology for sealing air duct
system leakage from the inside.
The method is perfect for
improving air tightness on new or
existing ductwork systems.
The patented process was
developed in the 1990s on behalf
of the US government at the
University of Berkeley in
California. Ever since it has been
used in both residential and
commercial markets. Through an
international network the Aeroseal
process is now available in the
USA, the UK, and across Europe.
Aeroseal technology provides a
much needed breakthrough to
improve energy performance of
inefficient HVAC systems, which
make up a substantial part of a
building’s energy bill and carbon
footprint.
3THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
HOW DOES AEROSEAL WORK?
The Aeroseal machine pressurises the ductwork system, then a sealant is transformed into a gaseous
state using heated compressed air. The aerosolized sealant particles are blown through the ductwork
system to seek out leakage. Adhesive particles attach directly onto the edges of any hole, quickly and
effectively closing it from inside the ductwork. Gaps of all sizes up to a diameter of 1.5cm are sealed and
will withstand a pressure of up to 2,000 Pa. In line components such as attenuators and fire dampers are
unaffected by the process.
4 THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
WHAT NEEDS TO BE CONSIDERED WHEN APPLYING AEROSEAL?
The process itself needs only
a few steps of preparation. First
all inlets and outlets of the air
duct system are sealed shut with
foam plugs or metal plates. The
ductwork connections to air
handling units, fans or heat
exchangers are dis-connected
and built-in sensors are taped
over, so that no particles of
the sealant can get into these
components. Silencers and
dampers don‘t have to be
protected as long as they are
completely open. The Aeroseal
machine is connected onto the
ductwork system by a length of
transparent plastic hose.
5THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
ADVANTAGE 1: SPEED
Finding ductwork leakage is
very difficult, usually there is
restricted access to the duct
system due to the building’s
characteristics, other services
and ductwork insulation.
Leakage is made up of many
small leaks, and lots of other
factors make locating and
closing holes in the ductwork
system extremely time
consuming and expensive.
When Aeroseal is used none of
this matters, the process is
faster and less invasive whilst
delivering superior results.
Aerosealed ducts can achieve
higher efficiency than tightness
class D, as per DW144.
Aeroseal has lowered the
leakage of airduct systems by
an average of 90%.
6 THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
ADVANTAGE 2: COSTAeroseal’s speed reduces the cost of sealing leakage compared to
manual sealing. No building work is necessary and the building can
be used again within 2 hours of sealing. To perform the process, 2 or
3 service technicians are sufficient - this results in lower staff
expenses and reduced risk to staff from working at height, confined
space entry and manual labour.
Where ductwork has already been insulated there is further saving as
this does not need to be removed or repaired.
7THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
ADVANTAGE 3: INCREASE OF COMFORT AND HYGIENE
Besides achieving unprecedented air tightness, Aeroseal also leads to a substantial increase in the level
of comfort within buildings, the thermal loss through leaks is greatly reduced and thus an even distribution
of heating and cooling is supplied throughout the building.
Another advantage of the Aeroseal technology is the increase of hygiene. The sealant meets the
requirements of the hygiene guideline VDI 6022 and has no negative health aspects. It may thus be used
in all buildings such as schools, hospitals and other public facilities.
8 THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
ADVANTAGE 4: DOCUMENTATIONAeroseal provides real-time data during sealing which is then
converted into a certificate at the end of the process. Total air loss
and equivalent hole size in the ductwork are calculated, these are
then presented clearly in graph-form and percentages. This makes it
simpler to achieve required leakage rates as per DW144.
9THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
ADVANTAGE 5: ENERGY SAVINGS
Fan power requirement increases by 3
times compared to the air leakage rate.
The SFP value (Specific Fan Power)
according to EN 13779 can be reduced by
the reduction of the air leakage rate. This
allows a compliance with the guidelines of
EnEV 2014
Ductwork leakage testing is not mandatory on all new ductwork systems, therefore many systems are commissioned despite being highly
inefficient. The lowest class of ductwork (class A) is generally expected to leak 6%, many untested systems will leak far more than this. This
leads to large inefficiencies and increased demand on fan power. Improved air tightness achieved with Aeroseal can reduce fan power
requirement and deliver considerable energy savings.
THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
HASMAN - AEROSEAL PROJECTS
Recent ProjectsLeakage (l/s) Equivalent Leakage
Class Overall leakage
reduction %Pre Post Pre Post
Whitfield Street Laboratories 477 42.1 >A B 91%
Hospital Northern Ireland 526 47.1 >A B 91%
Mickleton Hills Farm Wedding Venue 117 23.2 >A A 80%
New Bond Street Luxury Offices 33.2 1.8 >A D 95%
Francis Crick Institute Laboratory 60 9.0 B D 84%
Whipps Cross Hospital Ward 583 51.4 >A B 85%
Triumph Motorcycles Factory LEV 29 6.0 >A C 80%
10
THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
CASE STUDY: FRANCIS CRICK INSTITUTE
A state of the art research laboratory could not pass a vacuum hold test and it was suspected that ductwork leakage was the
cause of failure. The laboratory could not be opened until a vacuum hold test was passed. The extract ductwork system
serving the lab was sealed from the plantroom and the laboratory was then able to maintain a vacuum hold test for the
required duration. This allowed the laboratory to be opened in early 2019 without any ductwork replacement or building
alteration.
Date:Duct Material:
Objective:
Preseal leakage:
Postseal leakage:
Reduction of leakage:
February 2019
Steel
Seal ductwork leakage to make laboratory airtight
Class B
Class D
84 %
11
12 THE NEW AIR TIGHTNESS CLASS FOR DUCTWORK
CASE STUDY: MICKLETON HILLS WEDDING BARN
The supply ductwork system for the luxury wedding barn was laid underground within the concrete foundations of the building. The plastic
ductwork could not be safely accessed and was leaking above the specified airtightness class A. The wedding barn was due to open for
business in late 2018. Aeroseal of the ductwork system meant that no structural works were required and no ductwork replacement needed to
achieve the required airtightness class.
Date:Duct Material:
Objective:
Preseal leakage:
Postseal leakage:
Reduction of leakage:
September 2018
Plastic
Compensate shortcomings of the ventilation system install and ensure the building‘s opening on time
Not meeting tightness Class A
Class A
80 % ∅3
60 (e
xt. d
im)
AIR VOL (m3/s)
FULL LOADFUSE SIZEELECTRICAL SUPPLY
AIR HANDLING UNIT SCHEDULE
DUCT CONNECTIONSIZE (mm)
REF DESCRIPTION MANUFACTURER WEIGHTSIZE WxHxD(mm)
MODEL
AHU1 796kg S-572x1145 / R-561x1110DAIKIN UATYQ30-AFC3Y11790x2150x1730 2.292ROOFTOP PACKAGED UNIT 415v, 3Ph, 50Hz 40A 27A
2m
3m
4m
5m
6m
7m
8m
9m
10m
D2 D2 D3
D7
D7D9 D8
D1D4 D4D5 D5 D3 D2 D2
D4D5 D5 D3 D2 D2
D6
D12
D10
D4
D13D14D14D14
D1
D1 D11
D14D15
D8
D8
D8
D8
D8
D8
D8
D8
D8
D8
D11D11
D8
D16D16D17
D17
D17D17
D17
B
CC
A
A
D
D
EE
B
3080 3080 3080 4225 2745 2745 2745 7120
5640990 15490 1810 5100
22120 6910
2990
501
1145
221
4025
00
SUPPLY DUCT DROPS HERE TOUNDER SLAB LEVEL
RETURN AIR DUCT RISES HERE TOHIGH LEVEL & CONNECTS TO BARNWALL RETURN AIR GRILLE
DETAIL OF THE SUPPLY AIRDUCTWORK CONNECTION TO THEFLOOR LINEAR GRILLE
∅600∅360 (ext. dim.)
∅360
(ext
. dim
.)
350
12001200120012001200
1200 1200 1200 1200 1200 1200
1200
∅720
WHEATER PROOFED GALVANISEDDUCTWORK
U-PVC DRAIN PIPEWORK
∅500 (int. dim.)∅615 (ext. dim.)
900x900RETURN AIRGRILLE
1200
300
250
250
250
250
250
250
250
250
250
800
350
800
350
800
350
800
350
800
350
800
350
800
350
250
250
800
350
800
350
800
350
800
350
800
350
800
AHU1
300
442
150
175
325
325
150
175
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
2024 4950 2450 4427
∅360
(ext
. dim
.)
2150 4280
∅360
(ext
. dim
.)
1494 5480 2450 4427 2150
6861
4961
∅600 (int. dim.)∅720 (ext. dim.) ∅720 (ext. dim.)∅300 (int. dim.)
∅600
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
∅360
(ext
. dim
.)
1200800
350
200
180350
30
900x300
350
200
180
REV.DWG. NO. -
DRAWN
CHECKED
SCALE
DATERECORD DRAWING
CONTRACT DRAWING
APPROVAL DRAWING
PRELIMINARY DRAWING
DRAWING TITLE
CLIENT
PROJECT
195 GREENHAM BUSINESS PARKNEWBURYBERKSHIRERG19 6HW
TEL No: 01635 523700FAX No: 01635 [email protected]
DATEDESCRIPTIONREVISION
NOTES
ALL DIMENSIONS, EXCEPT WHERESTATED, ARE IN MM
ALL DIMENSIONS, WHEREAPPLICABLE, TO BE CHECKED,PRIOR TO MANUFACTURE.
THIS DRAWING IS THECOPYRIGHT OF SCUBAIR LTD,AND MAY NOT BE REPRODUCEDWITHOUT LICENSE.
DRAWINGS USED TO FORM THIS DRAWING
GARCPLIGHTING
MECHANICALELECTRICAL
---
--
air conditioning, ventilation & electrical services
1:50@A1,1:100@A3
R.M.
31/05/18
C2370/001
R.M.
MICKLETON HILLS FARM
GROUND FLOOR VENTILATIONLAYOUT
MICKLETON HILLS FARMWEDDING VENUE
HASMAN LTDUnit 2 Sandon Way,
Sandon Industrial Estate
Liverpool, L5 9YN
www.hasman.co.uk
