BUILDING DUCTING

HOW TO INSTALL DUCT WORK

STEPS

STEP 1:- CONSULT THE BUILDING CODES

FOR STATE AND MUNICIPALITY. EACH STATE HAS ITS LAWS OWN REGULATIONS IN HVAC INSATALLATIONS.

STEP 2:- PUT UR SAFTEY GEARS,

INCLUDING GOGGLES,FACE MASK,RESPIRATORS,WORK GLOVES,HELMET.

STEP 3 :-

SET THE MOUNTING RING OF YOUR DUCT WORK IN THE PLACE OF FURNACE, FAN OR AIR CONDITINOER.

STEP 4 :- RUN THE DUCT ALONG THE

ROUTE SPECIFIED BY UR PLAN . MOUNT INTO THE CELING WALL OR FLOOR PLAN USING THE METAL STRAP 3 TO 4 FEET. ATTACH THE STRAP USING NAIL AND HAMMER .

STEP 5 :- INSERT A CONNECTING COLLAR

INTO THE EACH LENGTH OF DUCT, THEN SLIP A MEW LENGTH ON THE OPPOSITE SIDE OF THE COLLAR.AFFIX THE PLACE USING DUCT TAPE

STEP 6 :- USE THE CUTTER OR SCISSORS TO

CUT OF THE EXCESS DUCT WHEN TIN WHEN IT REACHES THE END OF YOUR PLANNED LINE

STEP 7 :- WRAP THE LENGTH OF

COMPLETED DUCT IN THE INSULATION BY ROLLING IT IN SPIRAL PATTERN LIKE HANDLE THE HANDLE OF TENNIS RACKET

STEP 8:-

WRAP DUCT TAPE AROUND THE EACH END OF LENGTH INSULATION AND ALONG THE SEAM OF THE WRAPPED INSULATION .

STEP 9 :- REAPEAT UNTILL ALL YOUR GRILLS

AND REGISTORS ARE HOOKED UP TP YOUR HVAC SYSTEM.

STEP 10:- TEST YOUR SYSTEM BY TURING IT ON

AND CHECKING U HAVE SIGNIFICIANT AIR FLOW THROUGH EACH GRILL.

MATERIALS

Flexible non metallic ducts • These large-diameter, wire-reinforced ducts

can be used in long lengths, and have enough flexibility to snake around obstacles.

Long lengths eliminate the need for many joints, but leaks can occur where flex duct joins sheet metal registers or other types of ductwork.

These ducts are popular in attic and any cramped space .These duct can be torn, cut and crushed, so careful handling is important.

Sheet metal ducts:• Made from galvanized steel ,aluminum are the most common materials, these ducts can be rectangular or round. • One duct section usually slides into another. Leaks typically occur where sections join.

• They are also the least likely to harbor dangerous molds or growths because they have non-porous surfaces.

Fiberglass lined ducts :• These are sheet metal ducts that have internal or external fiberglass lining. This type of duct is common in office and commercial buildings, as it dampens the sound of the air conditioner unit.

• These ducts can deteriorate and eventually release fiberglass particles into the air this is a major health concern, especially with long-term exposure.

• These are also difficult to clean due to the cleaning process can damage the lining and release fibers. These ducts can also become contaminated with molds and bacteria.

Fiberboard ducts: Fiberboard is made from

fiberglass strands that have been compressed and bonded with a resin, and then covered with a sheet of foil laminate to protect them from moisture.

This type of duct is good for cooling and heating systems because it is well insulated by itself

It is not recommended for ventilation because, like fiberglass-lined ducts, they can become a breeding ground for mold and mildew in humid climates. Also, because the surface is rough, they can also affect airflow and efficiency.

COMPONENTS OF DUCTINGVIBRATION ISOLATERS• The blowers in the air handler

can create substantial vibration, and the large area of the duct system would transmit this noise and vibration to the inhabitants of the building.

• To avoid this, vibration isolators (flexible sections) are normally inserted into the duct immediately before and after the air handler.

TAKE OFFS STACK BOOTS AND HEADS . When the system is designed with a

main duct branching into many subsidiary branch ducts, fittings called Take-offs allow a small portion of the flow in the main duct to be diverted into each branch duct.

Take-offs may be fitted into round or rectangular openings cut into the wall of the main duct

The outlet of the take-off then connects to the rectangular, oval, or round branch duct.

Ducts, especially in homes, must often allow air to travel vertically within relatively thin walls.

These vertical ducts are called stacks and are formed with either very wide and relatively thin rectangular sections or oval sections.

At the bottom of the stack, a stack boot provides a transition from an ordinary large round or rectangular duct to the thin wall-mounted duct

VOLUME CONTROL DAMPERS SMOKE AND FIRE DAMPERS

Ducting systems must often provide a method of adjusting the volume of air flow to various parts of the system.

These dampers may be manual or automatic.

Smoke dampers are driven by a motor.

The motor is installed in the run of the duct and detect smoke either in the air which has extracted from or is being supplied to a room .

Naga vinnela 14031AA045 Shruthi vandhana 14031AA068 B.Madhu latha 14031AA007 M. Sowmya 14031AA035 V. Saritha 14031AA071 K. Vamshi 14031AA024 K. fanish 14031AA032 Sharath kumar 14031AA074