Method Statement Installation of HVAC Ductwork

Introduction:

This Method Statement covers the installation of HVAC Ductwork and accessories and the requirement of checks to be carried out.

HVAC Ductwork:

HVAC Ductwork generally includes all types of Supply Air Ducts, Return Air Ducts, Fresh and Exhaust Air Ducts and their accessories such as duct elbows, offsets, transformation pieces branch pieces, tee connections, access doors, Fire Dampers, Volume Control Dampers, Sound Attenuators and flexible ducting.

Ready to take your skills to the next level? 🚀 Check out our Special Online Courses! 🚀
Gain valuable insights, boost your career, and learn from industry experts.

Planning Courses

METHOD OF PRE-INSTALLATION:

Ensure that approved material required to carry out work will be available.
All relevant documentation and material applicable to a particular section of work will be checked by the site engineer before commencement.
Physical verification of material will be carried out for any damages before taking it from stores.
The site engineer/supervisor will give necessary instructions to tradesmen and provide necessary construction/shop drawings.
The site engineer/supervisor will also check that the tools and equipment available comply with contract requirements.
Before Leak testing, the Site Engineer will ensure that the Calibrated test kit is available and in good condition.

METHOD OF PRE-INSTALLATION

Mark ducts Locations

Determine the position of duct supports as per approved construction layouts and specifications.
fix the duct supports as per the approved shop drawing and specification.
Any cut edges of angles, channels, or threaded rods will be touched up with Zinc rich paint.

Prepare ducts.

Raise the ductwork onto the supports ensuring that each length is aligned with the preceding length as per the dimensions shown on approved shop drawings.
Approved duct sealant shall be applied to the joints.
Any excess sealant so that the joint is left in clean and tidy condition.
Ensure that ductwork is clean and that no tool debris exists within the ductwork before proceeding to the next length.
All open ends of the ductwork shall be temporarily sealed with polythene sheets/plywood before leaving the job site to prevent moisture and dirt.

Fixing the ducts & accessories

Ensure that all accessories like Volume control dampers, Fire dampers, Access doors, Test points, and Sensors are installed according to approved shop drawings.
Install Sound Attenuators according to approved shop drawings.
Installation of ductwork (complete with accessories) shall be checked before applying insulation at joints.
Ensure the duct surface is clean and dry before applying any insulation material.
Ensure the thickness of the insulation is as per the approved shop drawing.
Ensure that all edge joints are closely butted, and ends are flush and seated properly.
Apply ALUGLASS Tape (Self Adhesive Aluminum Foil Laminated on Glass fabric) to the Joints of the insulation.
Where insulated ductwork passes through fire-rated walls/partitions the gap between the sleeve and ductwork shall be filled with an approved fire barrier.

The relationship between HVAC Ductwork installation and other activities:

Predecessor	Activity name RECOMMENDED COURSE Data Management and Reporting Data Management is the key success of construction projects reporting. This self-study course will teach you using a step by step case… 1,674 students WhatsApp support group Certificate View course	Successor
Masonry works	HVAC Ductwork	False Ceiling Works

Productivity rate for HVAC Ductwork installation:

Productivity rate:

Meter sq. /day = 5.6

Hour/meter sq. = 1.4

Labor Requirement Per Group:

Duct mechanic

Highly Skilled Labor

Helper/unskilled Labor

Download the Resources of this Article