This document discusses ductwork design for HVAC systems. It covers key topics such as duct sizing based on balanced airflow and pressure drop; appropriate materials and insulation; layout considerations like placement of supply and return ducts; and ensuring noise control, maintenance accessibility, and code compliance. The document emphasizes integrating HVAC elements like grilles and diffusers effectively through techniques such as concealment, custom designs, strategic placement, and using them as design features. Proper ductwork design is important for maintaining indoor comfort and air quality in an interior space.

1. www.aftershockacademy.in
www.aftershockacademy.in

3. COURSE No.
COURSE NAME:

4. COURSE No.
COURSE NAME:
DISCLAIMER:
THIS EDUCATIONAL CERTIFICATE PROGRAM IN SUPPORT OF PROVIDING FUTURE PERSONAL DEVELOPMENT IS LICENCED TO
AFTERSHOCK ACADEMY, A DIVISION OF CRAN PROMOTIONS PVT. LTD. WHOLLY OWNED BY CRAN ENTERPRISES PTE. LTD.
This educational module is directed by and for the use of those instructing on behalf of or enrolled in, as received whether, directly or
indirectly, whether live in person or digitally transmitted by Aftershock Academy or those authorized representatives of Aftershock
Academy. The recipient is not use this presentation, make copy of, photograph, record whether copy or digitally access and use this
educational module in any manner by anyone other than those authorized as any other is unauthorized use. Without reserve, anyone in
possession of the educational module are to use it for the purposes of presenting and framing the subject matter content and are not to
copy, distribute, use or disclose the contents to anyone, whether for independent gain or not, without the authorization of Cran
Enterprises Pte. Ltd. and any such copies extended for classroom or familiarization prior to classroom use are to be deleted from the
computer system permanently it was obtained on and deleted from any electronic correspondence the program was attached to.
Educational investments and future opportunities are subject to market conditions, student’s participation, subject acumen, depth of
research, effort and talent. By continuing review of this educational module to the following slide and/or those following, partially or
completely, one agrees to the above terms and conditions without reserve. Cran Enterprises Pte.Ltd. All Rights Reserved, 2021.

5. 1.
WEEK 13
1. Overview of class assignments
2. Q&A Previous class
3. Introduction To HVAC Systems
4. HVAC System Types
5. Thermal Comfort
6. HVAC Zoning, Control & Energy Efficiency
7. Air Quality, Ventilation, Sound & Noise Control
8. Ductwork Design
9. LAB – HVAC Layout
10. LAB – HVAC Layout
11. LAB – HVAC Layout
12. LAB – HVAC Layout
13. Ductless Mini Split System
14. HVAC Maintenance & Sustainability
15. LAB – HVAC Layout
16. LAB – HVAC Layout
17. LAB – HVAC Layout
18. LAB – HVAC Layout

6. COURSE No.
COURSE NAME:
DUCTWORK DESIGN

7. INTRODUCTION TO DUCTWORK
• Ductwork is a fundamental component of
HVAC (Heating, Ventilation, and Air
Conditioning) systems that plays a crucial role
in maintaining indoor comfort and air quality.
• Interior designers should have a basic
understanding of ductwork principles,
including duct sizing, insulation, and
placement, to ensure that HVAC systems are
integrated effectively into interior spaces.
• Ductwork consists of a network of ducts,
which are conduits or channels, used to
transport conditioned air from HVAC
equipment to various spaces within a building.
Ducts can also carry return air back to the
HVAC system for reconditioning.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

8. PURPOSE OF DUCTWORK:
Ductwork serves several key purposes, including:
– Distributing conditioned air evenly
throughout the building.
– Maintaining indoor temperature and
humidity levels.
– Ensuring air quality by facilitating the
exchange of fresh outdoor air.
– Controlling air pressure differentials within
the building.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

9. DUCT SIZING:
• Balanced System: Ducts should be sized to
create a balanced system, where the volume
of air supplied to each room matches the
airflow requirements of that space. Oversized
or undersized ducts can lead to inefficiencies
and discomfort.
• Friction and Velocity: Duct sizing takes into
account the friction and velocity of air within
the ducts. Reducing friction through proper
sizing minimizes energy consumption and
noise while maintaining the required airflow.
• Pressure Drop: Duct sizing also considers
pressure drop. Excessive pressure drop can
lead to reduced airflow and inefficiency.
Designers aim to keep pressure drop within
acceptable limits.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

10. DUCT MATERIAL AND INSULATION:
• Duct Material: Choose duct materials that suit
the specific requirements of the system.
Common materials include sheet metal,
fiberglass duct board, and flexible ducting. The
choice of material depends on factors like
cost, insulation needs, and ease of
installation.
• Insulation: Insulate ducts located in
unconditioned spaces, such as attics or
crawlspaces, to prevent heat gain or loss.
Insulation improves energy efficiency and
helps maintain consistent indoor
temperatures.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

11. AIR DISTRIBUTION AND LAYOUT:
• Balanced Airflow: Design the duct layout to
ensure balanced airflow to all spaces.
Properly sized ducts, diffusers, and registers
are used to achieve this balance.
• Placement: Consider the placement of supply
and return ducts to optimize comfort. Supply
ducts are typically placed near windows or
exterior walls for efficient temperature control,
while return ducts are strategically located to
capture air from living spaces.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

12. AIR DISTRIBUTION COMPONENTS:
• Registers and Diffusers: Select appropriate registers and diffusers for each room
based on the required airflow and aesthetics. Properly chosen components can enhance
the interior design while ensuring comfort.
• Dampers: Install dampers in the duct system to control and balance airflow. These can
be adjusted to regulate the amount of conditioned air delivered to specific zones or
rooms.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

13. NOISE CONTROL:
Consider the use of duct silencers or attenuators
to reduce noise caused by the HVAC system. This
is particularly important in quiet or noise-sensitive
spaces.
ZONE CONTROL:
Implement zoning systems that divide the building
into different zones with individual temperature
control. This allows occupants to adjust conditions
in their specific area, improving comfort and
energy efficiency.
RETURN AIR PATH:
Ensure that return air paths are balanced and not
obstructed. Proper return air circulation helps
maintain pressure equilibrium within the building.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

14. MAINTENANCE ACCESSIBILITY:
Design ductwork layouts that allow for easy
access and maintenance. Service personnel
should be able to reach and repair ducts and
components without difficulty.
COMPLIANCE WITH CODES AND
STANDARDS:
Ensure that the ductwork design complies with
local building codes and HVAC industry
standards. Non-compliance can result in legal and
safety issues.
COLLABORATION:
Collaborate closely with HVAC professionals and
engineers to create a ductwork design that aligns
with the specific HVAC system in use and the
building's requirements.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

15. HVAC ELEMENTS FOR AESTHETICS &
FUNCTIONALITY
1. Concealment and Integration:
• Recessed Grilles and Diffusers: Recess HVAC
elements into walls, ceilings, or floors. This method
conceals the elements while ensuring their
functionality. For example, a diffuser can be recessed
into a dropped ceiling to maintain a clean and
unobtrusive appearance.
• Cabinet and Furniture Integration: HVAC elements
can be integrated into cabinetry or furniture. For
instance, a vent can be discreetly placed within a
cabinet, allowing for air circulation without
compromising the design.
2. Custom Design and Finishes:
• Custom Grilles and Diffusers: Consider custom-
designed grilles and diffusers that match the interior
design aesthetic. Custom options can include various
finishes, materials, and even patterns or branding
elements.
• Matching Paint or Veneer: Paint or veneer grilles
and diffusers to match the surrounding surfaces. This
can make them blend seamlessly with walls, ceilings,
or floors.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

16. HVAC ELEMENTS FOR AESTHETICS &
FUNCTIONALITY
3. Use as Design Features:
• Design Statements: Some grilles and diffusers can
be incorporated as design features. Select ornate or
decorative options that become part of the interior
design statement, such as decorative grilles in
historic or ornate settings.
• Architectural Elements: Integrate HVAC elements
as architectural features, such as using decorative
grilles in wall paneling or creating unique patterns on
ceilings using diffusers.
4. Smart Placement:
• Strategic Placement: Place HVAC elements in less
conspicuous locations, like corners, or behind
furniture or curtains. This minimizes their visual
impact.
• Balance and Symmetry: Integrate HVAC elements
within the overall design composition. For example,
you can balance the placement of vents or grilles
within a room to create symmetry and a harmonious
design.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

17. HVAC ELEMENTS FOR AESTHETICS & FUNCTIONALITY
5. Grille and Vent Selection:
• Low-Profile Designs: Choose vents and grilles with low-profile or flush-mount designs
that are less obtrusive and blend with the surrounding surfaces.
• Directional Grilles: Select directional grilles that allow for air direction adjustment.
These can be directed upwards or to the side to minimize drafts or discomfort.
WHERE OUTSTANDING IS AVERAGE
DUCTWORK DESIGN
LEARN THE TOOLS OF A PROFESSIONAL INTERIOR DESIGNER

18. www.aftershockacademy.in
WHERE OUTSTANDING IS AVERAGE