Ducts and Tanks: Insulation Product Selector
- Boiler Rooms
- Service Areas (back of house)
- Occupied Areas (front of house)
- Ventilation
- A/C
- Kitchen Extraction
- Toilets Extraction
- Heating Services Storage, Tank and Calorifier
Ducts
The table below sets out the
recommended products and finishes for ductwork in a range of
locations.
Tanks, cylinders & calorifiers
The table below sets out the
recommended products for tanks, cylinders and calorifiers.
Typical Specification Clauses
Square or Rectangular Ductwork: Thermal
Insulation
D1 Bright Class ‘O’ finish
Ductwork to be insulated with Crown Duct Roll/Crown Duct Slab,
......mm thick. The insulation to be cut to fit on site so that the
top and bottom pieces overlap the sides. Insulation to be bonded by
means of a suitable adhesive in accordance with the manufacturer’s
recommendations.
All insulation pieces to be closely butted together and all joints
to be sealed by means of matching self-adhesive tape not less than
100mm wide.
D2 Sheet metal finish
Ductwork
should be insulated with Crown Duct Slab as described in
specification D1.
Sheet metal of a suitable grade should then be applied following
the recommendations in specification P3.
Round or Oval Ductwork: Thermal
Insulation
D3 Bright Class ‘O’ finish
Ductwork to be insulated with Crown Duct Roll/Icerock Ductwrap,
......mm thick. The insulation to be wrapped round the ductwork and
bonded by means of a suitable adhesive in accordance with the
manufacturer’s recommendations.
All insulation pieces to be closely butted together and all joints
to be sealed by means of matching self-adhesive tape not less than
100mm wide.
D4 Sheet metal finish
Ductwork should be insulated with Crown Duct Roll as described in
specification D3.
Sheet metal of a suitable grade should then be applied following
the recommendations in specification P3.
Note that Crown Duct Roll is only suitable where the metal casing
is supported independently.
Ductwork: Fire Protection
Rocksilk PyroDuct .....mm thick to be used to provide ...... hours
fire protection (see table on pages 19-27) to steel ductwork as
detailed in this schedule (specifier to state which ducts require
fire protection). It is to be installed using the ...... fixing
system.
Ductwork: Acoustic Insulation
PRODUCT DISCONTNUED
Tanks: Thermal Insulation
Rectangular
cold water storage and feed and expansion tanks to be insulated
with Knauf Insulation Crown Duct Slab, ......mm thick.
The insulation to be fitted so that two opposite pieces overlap the
sides thus maintaining insulation thickness throughout.
The insulation to be bonded to the tank with a suitable adhesive,
applied in accordance with the manufacturer’s recommendations. All
slabs to be closely butted together and all joints sealed with a
matching self-adhesive tape not less than 100mm wide.
Where necessary, for external applications or where additional
mechanical strength is required, the insulation should be protected
by sheet metal.
Cylinders and Calorifiers: Thermal
Insulation
Cylindrical vessels shall be insulated with Crown Universal Slab
type CS ..... thickness ......mm, firmly secure to the vessel with
metal bands, adhesive or a combination of both. The metal bands
should not be over tensioned so as to significantly reduce the
thickness of the insulation. On vertical surfaces, circumferential
support rings shall be fitted and spaced apart at distances which
will provide adequate support according to the weight of the
insulation. The support rings shall protrude from the vessel to a
maximum distance of 10mm less than the thickness of the insulation.
All joints must be well butted together and vertical joints on
adjacent courses staggered. In multi-layer applications, all joints
shall be staggered.
The insulation may be fixed to domed ends by impaling over pins and
secured with spring washers or forked pins welded to the vessel. In
either case, the outer ends of the pins should be depressed below
the surface of the insulation to prevent heat being transmitted
direct to the covering.
Note: Vessels operating at sub-ambient temperatures must have an
adequate continuous vapour seal applied over the insulation and
fixings.
Ducts - Thermal - Square
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Ducts - Thermal - Round
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Ducts - Fire Protection
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Tanks
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Cylinders & Calorifiers