Air Duct Sizing Calculator Online

Table Of Content

• Finding the index run – duct sizing
• HVAC Ductwork Sizing (with Calculator): How to Size Air Ducts Easily
• HVAC Systems - Duct Design
• Air Ducts - Major Friction Head Loss, Online Calculator

It is better to include a fresh air supply duct to introduce outdoor air for ventilation. Typically, the fresh air is about 10% of the total airflow of the HVAC unit. One supply air diffuser will probably do the job but I decided to go for two diffusers in an effort to reduce the noise level. Most HVAC units are designed to have a 400 CFM of airflow for every BTU or 1 ton of cooling capacity and BTU divided by 400 CFM is 30.

Finding the index run – duct sizing

So, follow the below step-by-step process and I hope you will be able to design HVAC ductwork successfully. As you can see, designing HVAC ductwork is a lengthy process, especially if you have little to no knowledge about it. In the ServiceTitan Ductulator, select the type and shape of duct you plan to use to get the correct corresponding measurements in the duct size chart. To calculate the duct CFM for each room, you must first perform an HVAC load calculation for the whole house and for each room, using the Manual J method. So, if a room measures 10-by-10 feet, the total area equals 100 square feet.

HVAC Ductwork Sizing (with Calculator): How to Size Air Ducts Easily

You might want to open the AC BTU Calculator in a separate window for convenience, so you can easily return to this Ductwork Sizing page. Ductwork that is too large won’t have enough pressure, and the velocity of air won’t carry it to the furthest reaches of the home or building. This will result in significant temperature imbalances that nobody will like.

HVAC Systems - Duct Design

Moreover, it employs industry-standard (such as ASHRAE) formulas to provide accurate results. Can save money by reducing the number of time spent on manual and long calculations, and avoiding costly mistakes. Saves time by providing quick and easy calculations, putting an end to performing complex mathematical calcs manually.

The total effective length (TEL) equals the measured length from the farthest supply outlet, through the equipment, and to the farthest return outlet—plus the equivalent lengths of all turns and fittings. Friction rate gets calculated based on the pressure drop per 100 feet. The less static pressure available, the larger the ductwork required.

Air Duct Velocity Calculator

Whenever you branch out a duct, minus the total airflow by the airflow going to the branch duct to reduce the size of the subsequent main duct and connect two different duct sizes with a duct reducer. Once you got the HVAC unit, diffuser and grille sorted out, get ready a layout plan drawing or sketch it out. To calculate the required equipment size, divide the HVAC load for the entire building by 12,000. One ton equals 12,000 BTUs, so if a house or office needs 24,000 BTUs, it will take a 2-ton HVAC unit. If you get an uneven number, such as 2.33 for a 28,000 BTU load capacity, round up to a 2.5-ton unit. This is complex and technical information that many HVAC technicians struggle to grasp – and wouldn’t accurately calculate without specialized ductwork sizing software.

Air Ducts - Major Friction Head Loss, Online Calculator

The living room has a floor area of 300 sqft and the capacity needed is 9000 BTU. To calculate the airflow requirement for the living room, divide 9000 BTU by 30 and the result is 300 CFM. Afterward, you need to decide what type of supply air diffuser you prefer and settle the size of the supply air diffuser.

ASHRAE updates duct size calculator - Cooling Post

ASHRAE updates duct size calculator.

Posted: Mon, 02 Jan 2017 08:00:00 GMT [source]

I believe with better knowledge, we all can have a more energy-efficient world. If you have trouble or not feeling confident enough, consider my Email Consultation service or directly engage me to design the duct system with my Design & Layout Drawing. Without them, you may not have a balanced airflow throughout your home. As a general good practice, you should fix the height of the main duct to be about the same as the height of the HVAC unit.

Air Ducts Spreadsheet Template - The Velocity Method

There is an inverse relationship between the internal diameter of a duct and the duct velocity. This means that the air velocity will expand as the duct diameter reduces. Calculate air velocity flowing through ducts easily using our free Air Duct Velocity Calculator.

I have the supply, return and fresh air ducts as well as diffusers and dampers. The size of the main duct is based on the total airflow or the airflow rated on your HVAC unit. For duct sizing, you can use online calculators or see my post How to Calculate Duct Size? Friction loss rate depends on many different duct size measurements, like the length of each duct; the amount of coils, filters, grills, registers, and dampers in your system; and the amount of turns in the ductwork. Your contractor will use a duct size calculator to combine these measurements and features into your system’s static pressure measurement.

He design, install, commission and service various kind of HVAC systems. Ever since he created this website, Yu has helped hundreds of homeowners and engineers. Similarly, the dining and kitchen room has 4 linear diffusers and the master bedroom has 4 linear diffusers. Meanwhile, bedroom 2 and bedroom 3 only have 2 linear diffusers respectively. Choose a more powerful blower – for example, if your calculation based on the number of tons multiplied by 400 yields 1,200 CFM, consider choosing a blower capable of 1,500 CFM.

H2x is CIBSE-verified design software built to improve the efficiency and quality of your design process. We’ll do another tutorial covering additional ways to improve efficiency in ductwork system. Now we want to make a table with the rows labelled as per the example. Each duct and fitting needs its own row, if the air stream splits such as with a Tee section, then we need to include a line for each direction, we’ll see that later in the article. Once you have these, just tally them together to find which is the biggest Load as we need to size the system to be able to operate at the peak demand.

By understanding and applying the principles outlined in this guide, mechanical engineers can ensure their systems deliver optimal performance, comfort, and longevity. The final step is to determine what materials are needed to complete the job based on your planned duct system. There's a reason we are rated 4.9/5 for customer support on Capterra. Our integrated help buttonmeans that a real engineer will assist with any design query, no matter how big or small. However, it's essential to input correct data for the most accurate results.

The total number is determined by the unit size of the AC, heat pump or air conditioner in tons/BTUs. This is vitally important, something we’ll belabor a bit, because ducts that are too small or narrow will wreck efficiency and make the system work too hard, leading to early mechanical failure. Our Ductwork Calculator, which some call a ductulator, gives accurate results for duct sizing diameter when the right information is plugged into it.

26 Secret Tips the Cruise Lines Don't Tell You

Table Of Content

• Cruise Ships with Lower Scores (under
• How Dirty Are Cruise Ships
• Code Adam

With a perfect score, these cruise ships represent the gold standard in cleanliness and sanitation, reassuring passengers about their health and safety while on board. Don't open that unmarked door, or you may unwittingly step into the cruise morgue. Nope, it's not on the official tour, but most large ships have one. (Cruise Critic estimates about three deaths per week.) The onboard morgues can typically store up to three bodies, until the ship reaches an appropriate port. So for example, if you're sailing through the Caribbean when a passenger dies, that person is kept in the morgue until the ship returns to the United States. The more you cruise, the more you pick up on cruise tips and secrets the cruise lines don't always tell you.

Cruise Ships with Lower Scores (under

It’s not always the case, but sometimes you’ll run into discounts around the ship if you buy when the ship is in port. For instance, maybe it’s a spa session that has a slight discount if you book a service while the ship is docked. Or things like Royal Caribbean’s North Star observation pod are free when done while the ship is in port, but sees a charge if sailing.

How Dirty Are Cruise Ships

Can you hear a combination of two secret codes on a cruise ship? This is another secret code that a cruise ship staff uses to discreetly communicate to each other that there’s some form of emergency going on that requires their action. Ever wondered what those strange—and sometimes downright funny—codes that a cruise ship captain uses to communicate with crew members mean? Maybe you’ve heard the crew saying weird things that didn’t make sense. In 2013, Carnival Triumph's engine caught fire, and the air-conditioning system shut down along with the sewage system. There were 4,200 passengers floating in the Gulf of Mexico with their raw sewage spilling in the hallways.

Code Adam

Getting it on between passengers and crew is expressly prohibited. It can reportedly cost the crew member their job, no questions asked. If you want to read the latest report for the ship you’re sailing, the CDC maintains a database of the latest scores. Also includes are full inspection reports, so you can see exactly what the ship needed to address. One thing you might not think to bring is a small portable fan for your cabin room.

Secrets of Cruise Ships From Crew Codes to Sex to Norovirus - Bloomberg

Secrets of Cruise Ships From Crew Codes to Sex to Norovirus.

Posted: Wed, 31 Jan 2018 08:00:00 GMT [source]

Plus, there are the fumes generated from carrying ships the size of small towns. The Sapphire Princess generates the same amount of sulfur dioxide as 13.1 million cars generate in a day, according to the EPA. Since the year 2000, there have been about 200 reports of cruise ship disappearances (a whopping 23 of those occurred in 2012). According to Ross Klein, author of Cruise Ship Blues, 94 out of the 200 disappearances have happened on Carnival ships. The average age of the vanished passengers has been 44, and they've gone overboard typically on the final night of the cruise.

Unfortunately, we live in a world where you have to be cautious with your valuables. Every cabin will come with an in-room safe, which you should use whenever you leave the room. It’s perfect for storing extra cash, electronics, passports and more. No, you don’t have to go through the same hassles that you see in airports to get on the ship.

Upon disembarkation, cabins undergo a detailed cleaning process. This includes changing bed linens and towels, vacuuming or mopping the floors, dusting surfaces, and disinfecting high-touch areas such as doorknobs, light switches, and remote controls. One cruise ship made headlines in 2023 for failing its inspection, scoring a shockingly low 67, which is extremely rare. Scores are assigned based on the inspection findings, and a cruise ship must achieve a minimum score of 86 to pass.

Bring your own power adapter to give you more outlets

But it also means that every bad decision you make is set tofilm. It’s not significantly different than being filmed in a supermarket. Except that you don’t live in a supermarket for a week at a time.

Cabins at the ends of the ship should have less noise

They work closely with local authorities and environmental organizations to mitigate any negative impacts on these fragile ecosystems. Moreover, cruise lines have implemented enhanced cleaning measures in response to the ongoing pandemic. Here is a list of the inspection score results for the several popular cruise lines. You can find the most inspection scores for individual cruise ships on the CDC’s website, as well as individual ship inspection reports.

Housekeeping staff make the beds, empty trash bins, and tidy up the cabin. They also restock amenities such as toilet paper, tissues, and soap. Additionally, elevator interiors and buttons are regularly cleaned to minimize the spread of germs. High-touch surfaces, such as handrails, escalators, and doorknobs, are given extra attention to ensure cleanliness. Food and beverage areas, such as restaurants and buffets, follow stringent cleaning procedures to prevent foodborne illnesses. Utensils and dishes are washed using high-temperature dishwashers, and surfaces are sanitized regularly.

Assuming the warrants are for minor items, we’ve heard of them letting the passengers cruise before escorting them off the ship once it arrives back at port. When you’re packing, it’s a great idea to bring an assortment of medicines for general issues. Ibuprofen for a headache, Imodium for your stomach, aloe for sunburn, etc.

Some cruise lines will use “Operation Bright Star” in this scenario. If you hear “Code Purple” on the overhead speakers, don’t panic. Cruise ship security is highly trained to deal with all kinds of emergencies.

The issue, apparently, is that cruise ship toilets (and most regular toilets, too) aren't equipped to flush anything except waste or toilet paper, as they use vacuflush systems. Otherwise, you'll mess up the system for your entire floor until the plumber fixes the system. Fire is the biggest threat to a cruise ship and one no cruise captain ever wants to hear or have to alert the crew about. There are also reports that a “Code Winnie” is a secret code for a poo in the pool on Disney Cruise Lines. A code red indicated an outbreak of illness on board the ship. Norovirus is the cruise-vacation souvenir no one wants to bring home—so check out this list of the safest (and not-so-safe) cruise lines to ensure you have a bon voyage.