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First Duct - Pre Insulated Duct Supplier

ADVANTAGE

Reason why First Duct better

Compare

Comparison

First Duct panel product is the preferred solution for all your ducting needs. Here on this spread we compare the different types of ductings compared to that of ours.

FirstDuct Panels	Flexible Ducts	Spiral Sheet Metal	Rectangural Sheet Metal

PERFORMANCE

Thermal insulation

Air seal

Friction loss

Acoustics

Air quality and hygiene

Lifespan

Safety

Transport

Construction

Installation

Availability

Easy estimation

Competitiveness

Energy saving

Leaking Air

Static pressure within the duct (Pa)	First Duct wind leakage Volume (1/s.m2)	Metal Sheet wind leakage Volume (1/s.m2)
200	0.083	0.7636
400	0.134	1.2328
1000	0.44	4.048
2000	0.801	7.3692

Energy Saving

Material	Energy saving index
20 mm First Duct with thermal insulation	85.23%
25 mm duct from galvanizing iron sheet	79.14%
19 mm duct from galvanizing iron sheet	74.26%
8 mm duct from galvanizing iron sheet	59.51%
Duct from galvanizing iron sheet	0

R-Value

Insulation Materials	R / Inch
Fiberglass Batt	3.14 - 4.30
Fiberglass Blown (attic)	2.20 - 4.30
Fiberglass Blown (wall)	3.70 - 4.30
Rock Wool Batt	3.14 - 4.00
Rock Wool Blown (attic)	3.10 - 4.00
Rock Wool Blown (Wall)	3.10 - 4.00
Cellulose Blown (attic)	3.13
Cellulose Blown (Wall)	3.70
Vermiculite	2.13
Autoclaved Aerated Concrete	1.05
Urea Terpolymer Foam	4.48
Rigid Fiberglass ( > 4lb/ft3)	4.00
Expanded Polystyrene (beadboard)	4.00
Extruded Polystyrene	5.00
Polyurethane (foamed-in-place)	6.25
Polyisocyanurate (foil-faced)	7.20

http://coloradoenergy.org/procorner/stuff/r-values.htm

The R-value is a measure of thermal resistance used in the building and construction industry. Under uniform conditions it is the ratio of the temperature difference across an insulator and the heat flux (heat transfer per unit area per unit time, $\dot Q_A$ ) through it or $R = \Delta T/\dot Q_A$ . Thermal resistance varies with temperature but it is common practice in construction to treat it as a constant value.

An R-value is a unit thermal resistance for a particular material or assembly of materials (such as an insulation panel). The R-value depends on a solid material's resistance to conductive heat transfer. For loose or porous material, the R-value accounts for convective and radiative heat transfer through the material. However it does not acocunt for the radiative or convective properties of the materials surface, which may be an important factor for some applications.

R is expressed as the thickness of the material normalized to the thermal conductivity. The unit thermal conductance of a material is the reciprocal of the unit thermal resistance. This can also be called the unit surface conductance. The higher the number, the better the building insulation's theoretical effectiveness.