Galvanized and Stainless Steel Ductwork for Your Home

People say that to have a good home, one must have a good ventilation system in place. That means having ducts – steel ductwork among them – and vents installed above the ceiling. These metal formations help in making our house "breathe." A good HVAC system in a home enables the house’s inhabitants to live comfortably and healthy as sufficient amounts of clean air are circulated inside while hot and humid air exits the home. With the heat circulation, your home is assured of obtaining the right amount of clean air for the right temperature. Another benefit for steel ductwork is shortened electric consumption bills because you will not be able to spend more energy; insufficient insulation makes the home easy to lose heat in winter and cold in summer. High electricity costs are often associated with faulty insulation: air conditioners work too hard to cool the room and heaters

Steel, in its galvanized form, is the most common material for ductwork for use in heating, ventilation, and air conditioning. Steel is an alloy of iron and carbon; carbon prevents discoloration of iron and makes the mineral stronger and more durable. It is the most common building material in the whole world; yearly production of steel amounts as much as 1.3 million tons. It plays a pivotal role in the construction, maintenance, and usage of buildings, airplanes, ships, computers, household appliances, and weapons. Today, there are different grades of industrial steel available and comes in different forms.

A dependable material for your home

 Galvanized steel is the most common material used in ductwork. This material gained its popularity among home builders as it is relatively easy to work with; bending, hammering, and cutting are often done without any delay. It is lightweight compared to other duct materials and costs less than those. Steel is first placed into a hot furnace where molten zinc is already prepared. The steel plates are then immersed into the white-hot zinc liquid. There, the two minerals combine together chemically to form a more durable form of steel. The zinc coating helps in preventing corrosion, which is a regular problem in ducts and ductwork; it is able to resist chemical change brought by salt and other hard materials; and is known to be effective even in places where extreme temperatures are observed.

There are three methods of manufacturing ductwork, yet we are going to consider only one method: the Phenolic, or pre-insulated, method. The making of steel ductwork starts with the outline of the duct to the steel panels insulated beforehand. The parts are cut, usually at 45 degrees, according to their outlines. In the case of elbow ducts and other bent varieties of ductwork, the parts are further bent into the desired shape for the different fittings. Enclose the seams and edges with aluminum tape; and lock the parts in place with glue.

Steel is better

There are other kinds of ductwork aside from steel: flexible ducts and fiberglass duct boards. Flexible ducts are those that are made of plastic wrapped over coils of metal wires. It is usually found as clothes dryer vents and a lot of places where air pressure is low. Fiberglass duct boards are made by not cutting the duct board; instead, it is made by making creases on the duct board and folding these creases. Staple wires and metal-backed tape attach and seal these duct boards; usage of regular duct tape is strongly discouraged because it dries and discharges itself from the duct board from time to time.

Steel ductwork is recommended well by many than flexible ducts and fiberglass duct boards. Unlike flexible ducts, steel ductwork does not restrict air flow since it has a lower air resistance rating. Flexible ducts have tendencies to bend too much which also restricts air flow; same goes for those that are beaten and crumpled. Flexible ducts become saggy over time which increase pressure loss that lead to higher electric costs, low air quality, and can shorten the HVAC equipment. Fiberglass duct boards are inferior to steel ductwork in the sense that it also resists air flow more than those of the steel variety. This kind of ductwork is also hazardous to health as fiberglass particles can be removed from the duct board and into the rushing air; these particles can be inhaled by people and cause respiratory diseases. The duct surface can inhibit the growth of molds because it traps dirt; a dilemma ensues when cleaning these ducts as it may damage the surface.

Consult and buy one now!

Steel ductwork is readily available in home improvement stores everywhere, or online through retailers’ and manufacturers’ websites. There are a lot of choices of this kind of ductwork out there. Selecting steel ductwork for your home depends largely on your needs. You should ask a ventilation expert before buying one.


A well-installed duct system makes a home more comfortable to live in and its inhabitants healthier. A good living and good savings, not to mention efficiency, are things that only steel ductwork can provide.