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Search Results - HVAC

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HVAC (pronounced either "H-V-A-C" or "H-vak") is an initialism or acronym that stands for "heating, ventilating, and air conditioning". HVAC is sometimes referred to as climate control and is particularly important in the design of medium to large industrial and office buildings such as skyscrapers and in marine environments such as aquariums, where humidity and temperature must all be closely regulated while maintaining safe and healthy conditions within. In certain regions (e.g., UK) the term "Building Services" is also used, but may also include plumbing and electrical systems. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as HACR (such as the designation of HACR-rated circuit breakers).

Heating, ventilating, and air conditioning is based on the principles of thermodynamics, fluid mechanics, and heat transfer, and on inventions and discoveries made by Michael Faraday, Willis Carrier, Reuben Trane, James Joule, William Rankine, Sadi Carnot, and many others. The invention of the components of HVAC systems went hand-in-hand with the industrial revolution, and new methods of modernization, higher efficiency, and system control are constantly introduced by companies and inventors all over the world.

The three functions of heating, ventilating, and air-conditioning are closely interrelated. All seek to provide thermal comfort, acceptable indoor air quality, and reasonable installation, operation, and maintenance costs. HVAC systems can provide ventilation, reduce air infiltration, and maintain pressure relationships between spaces. How air is delivered to, and removed from spaces is known as room air distribution.[1]

In modern buildings the design, installation, and control systems of these functions are integrated into one or more HVAC systems. For very small buildings, contractors normally "size" and select HVAC systems and equipment. For larger buildings where required by law, "building services" designers and engineers, such as mechanical, architectural, or building services engineers analyze, design, and specify the HVAC systems, and specialty mechanical contractors build and commission them. In all buildings, building permits and code-compliance inspections of the installations are the norm.

Showing 1 to 25 of 160 Articles matching 'HVAC' in related articles.
Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | Next >>

1. Office & Commercial Air Conditioning Advice
July 03, 2009

Households are not the only buildings that require air conditioning. Most buildings such as offices, warehouses, schools, government buildings and stores all require air conditioning as well. Almost any building that at one time or another has to house a large amount of people should have air conditioning. Below are 4 tips relating to commercial air conditioning systems. 1) Get A Unit With More Capacity - Commercial properties require the air conditioner to have more capacity than that of a residential property. This is because commercial properties have a far greater number of people and... (read more)

Author: James Fletcher

2. Use of MEP Design and MEP Engineering Services
July 03, 2009

There are so many engineering services in the industrial market and every engineering service has a flexible team of mechanical engineers and draftsmen who concentrate in drawing, drafting services and mechanical design. Our experienced team has very depth knowledge of mep design which enables the most complicated hvac, electrical and plumbing projects. Engineering follow ASHRAE, IMC, IPC, NEC, NFPA codes for MEP (Mechanical Electrical Plumbing). Engineers have grown exponentially and have always maintained commitment to provide the best craftsmanship and level of expertise to meet our cl... (read more)

Author: Harvesh Modh

3. Considerations in Structural Steel Design & Construction - Part 1
June 26, 2009

Troubles in the steel industry reveal many of the same characteristics as allied industries: Instrumentation, electrical, plumbing, HVAC and concrete. But, steel has some rare characteristics which leads to special considerations in its design and fabrication. The major factors affecting design of steel structures are weight, steel connections, quality of steel, schedule & cost estimates. Here we will try to address first two issues – weight & connections. Weight Steel is heavy and contractors associate weight with cost and that is true. But the actual cost of the steel structure is in t... (read more)

Author: James Lee

4. Office Air Conditioning - How To Fix An All To COmmon Problem
June 26, 2009

If you have worked in an office before, you have most likely had issues with the air conditioning. So many offices have problems where one side of the office is freezing cold whilst the other side of the building is boiling hot. So why does this happen and what can be done about it? Below is a guide to commercial air conditioning systems which discusses why so many problems occur in offices and also highlights some possible solutions to your dilemmas. The Cause - So why does the air conditioning system in an office cause so many problems? The main cause of the problem is the differing hea... (read more)

Author: James Fletcher

5. Minneapolis Heating and Air Conditioning- How to Choose a Contractor
June 23, 2009

Minneapolis heating and air conditioning- How To Choose a Contractor. The last thing most of us want to be doing when the weather changes is dealing with a new furnace or new air conditioner.If you find yourself in that position here are some tips to help you make it as painless as possible.How do you find a reputable HVAC contractor to work with?Ask your friends and associates or coworkers for recommendations, word-of-mouth is often the best and most important form of advertising for small businesses and usually gives you the most accurate information unless the contractor is a family member... (read more)

Author: Irving Bradley

6. How To Fix Blocked Air Conditioning Drains
June 22, 2009

All reverse cycle or refrigerative air conditioning systems have condensation or drain pipes to remove any condensation from the system. So what do you do if your air conditioners drain pipes get blocked? What will happen if these condensation pipes stop flowing? Below is a guide to air conditioning drain pipes with 3 ways to keep your drains clean and free from obstructions. Drains from an air conditioner are used to remove any condensation produced by the system. If these drains become blocked, the air conditioner will leak water either down the wall or through the ceiling, depending on... (read more)

Author: James Fletcher

7. 4 Tips To A Better Air Conditioning Quote
June 19, 2009

Purchasing a new air conditioning system? Do you know the top 4 things that you must have included in your quote? Read on to find the 4 most important things, to make sure that they are included in the quote that you receive from your air conditioning contractor. These 4 tips may save you money down the track, and help ensure you get a great air conditioning system that you are happy with. 1. Are The Installers Qualified - Before agreeing to any work or letting any contractor in your home, you must check to ensure they are qualified, licensed and insured. Ask to see any certificates, lice... (read more)

Author: James Fletcher

8. Mechanical Maintenance Education in Arizona
June 16, 2009

Careers in heating, ventilation, air conditioning and refrigeration are obviously useful and prevalent in a state that holds average temperatures of at least 70 degrees year-round. Arizona career training schools provide programs that will lead you to a successful career in the HVAC area. This education prepares you for positions as high as vice president of maintenance to owners of air conditioning and refrigeration corporations. Your interest in this field, however, may go beyond that of the opportunities open to a graduate of an HVAC program. In this case, an Arizona mechanical mainten... (read more)

Author: William Hauselburg

9. Mechanical Drafting Design by Experienced Mechanical Engineer
June 16, 2009

Mechanical 3D Modelling is an Indian company working for worldwide clients providing various value added mechanical drafting, design and 3d modeling services. We are known for quality, cost effectiveness and time bound mechanical engineering services complemented by state of the art facilities. Description: Mechanical drafting and design services provided by experienced mechanical engineer with every possible capability and processes, which you need to develop, manufacture your future mechanical design products. Mechanical Drafting and Design Services include: • Mechanica... (read more)

Author: Harvesh Modh

10. What is mechanical design and benefits of outsourcing mechanical design
June 14, 2009

The preparation of plans and calculations which set forward in detail the Heating, Ventilation, Air Conditioning (HVAC) elements of the building is called mechanical design. Mechanical design services deal with conception and design of mechanical systems. From the concept to detailed design, and on to drawing production, mechanical design products accelerate core activities of product development. In today’s world mechanical design services have considerable amount of revenue. Some of the general benefits include improved correctness and efficiency along with easy interference inspection.... (read more)

Author: Kelvin Aniston

11. Tips for choosing a home energy contractor that doesn't suck
June 14, 2009

Every once in a while, you may have a need for a contractor that focuses in home energy products. For example you may need to install a new furnace or perhaps repair your furnace. Or, you may need an HVAC (heating ventilation and air conditioning) tune up. In any event, opening your phone book will show that there are practically hundreds of choices. Which one do you opt for? The ones with the fanciest or most familiar commercials on the TV or radio? The first one in the your local internet search results? The one with the biggest advertisement? The best possible ad for contractors, ... (read more)

Author: Energy Dave

12. Benefits of Geothermal Heat Pumps
June 14, 2009

The Department of Energy (DOE) and the Environmental Protection Agency (EPA) have both endorsed geothermal heat pump systems as among the most energy efficient, environmentally clean, and cost effective systems for temperature control. Homeowners can expect to enjoy a comfortable, reliable, and economical system while also reducing energy use and pollution. Ground source heat pumps provide heating, air conditioning, and, if so equipped, supply the house with hot water. They are smaller than a traditional heating/cooling unit and can easily be retrofitted into any home. The mechanica... (read more)

Author: Henry Egg

13. Geothermal Heat Pumps
June 14, 2009

Above the ground we can expect to experience dramatic temperature changes throughout the year. However, just a few feet below the Earth's surface the temperature remains more constant at around 50 to 60°F. A geothermal heat pump takes advantage of these more mild temperatures through a series of pipes and a heat exchanger. In winter, when ground temperatures hover around 50° F, these systems pump fluid underground through a series of buried pipes, called a loop. The fluid becomes naturally heated, circulates back into the home, and an electrically driven compressor and heat exchanger c... (read more)

Author: Henry Egg

14. 4 Troubleshooting Air Conditioner Tips
June 11, 2009

Air conditioners often fail at the worst possible times. When it is extremely hot, you don't want your air conditioner to suddenly stop working. But if it does, there are some simple steps you can take to try to fix the problem yourself. Below is a list of the 4 most common air conditioning problems encountered, with some advice on how to fix them yourself rather than paying for the expensive air conditioning repairman. 1. Check The Air Conditioning Controller - Make sure your air conditioner controller is running on the correct setting first. Air conditioners have different setting for b... (read more)

Author: James Fletcher

15. Geothermal Technology
June 11, 2009

Commercial Geothermal HVAC Geothermal Experts ">Did you know the earth can heat and cool your home while saving on energy costs over the long term? Just below the earth's surface, the temperature remains relatively constant throughout the year by absorbing half the sun's energy. Geothermal heat pumps tap into this natural ground source of energy reducing heating costs up to 60%, and cooling costs by 25% in summer months. GHP's have three components: a ground heat pump, a closed pipe system, and the air delivery system. Buried in the ground is the closed loop, which is a continuous lo... (read more)

Author: Charlie Egg

16. Professional Structural Engineering Consultant San Diego - A Guide
June 10, 2009

With about thousands of professional structural engineering consultants practicing in the USA today, finding the appropriate one for your requirements can be a challenging task. The sectors is diversified into more than 15 practice areas and encompass specialties such as structural, steel, mechanical, electrical as well as HVAC services. Choosing a structural engineering consultant can be a lengthy process that often takes one week or more and any mistake at the start can cost you extremely. A right structural consultant quickly and effectively can: 1. Save you money and time 2. ... (read more)

Author: Richard Bose

17. 5 Choices In Home Air Conditioning - HVAC Guide
June 08, 2009

When looking for a new air conditioning system, you will quickly realize there are many different options out there available to you. So how do you know which air conditioning system is best for you? Sometimes it is hard to tell what type of system you should buy. If you would like some help, read our tips below which discusses the advantages and disadvantages of each type of air conditioning system. 1. Window Mounted Or Box Units - Box or window units are the cube looking units you see sticking out of a side of an apartment wall or a window. They are a cheap way to air condition one room... (read more)

Author: James Fletcher

18. Air Conditioning - 4 Step Guide To Purchasing A New HVAC System
June 07, 2009

If you are looking at purchasing a new air conditioner, there are quite a few important things to bare in mind. Following is the 4 main things you must consider before buying an air conditioning system. 1. What Is Your Budget - Before you start even looking at getting air conditioning, you should set yourself a budget. Different HVAC systems cost different amounts of money so you need to know what you can afford before you go searching. Different air conditioners range from a few hundred dollars to tens of thousands of dollars depending on what system you choose. A budget will also help y... (read more)

Author: James Fletcher

19. Important Things You Should Know About Your Home Improvement Project
June 01, 2009

Building Contractors are those specialized people you need when it comes to doing improvements on your home or business. These contractors have the most current knowledge of building codes and laws, construction methodologies and your home improvement project. Contractors can handle most any type of improvement remodeling, interior design, exterior repairs, new building projects, and service/repairs. Before hiring one, it is always better to ensure they are appropriately licensed and both of you are bound by a mutual agreement. When hiring a contractor make sure your check their ... (read more)

Author: Ricky Gaspard

20. ACCA And QI Specifications For Contractors And Technicians
June 01, 2009

It is readily apparent that quite a few of the air-conditioners and heat pumps installed in structures across the US fail to work as specified. Some of the reasons include sizing, airflow issues, and incorrect refrigerant charge. Other issues relate to improper installation practices and questionable service procedures. Any of these problems causes the system to perform less than satisfactory by the owner…especially concerning efficiency and comfort. Reputable contractors are called everyday to correct these issues and others. Hopefully, the contractors and technicians who are correcting issue... (read more)

Author: Phil Rains

21. Air Conditioning Contractor Secrets Revealed - 5 Great Tips To Save You Money
May 29, 2009

If you need an air conditioning system it will most likely cost you a lot of money. But what if you could save money and still get a great brand of air conditioner? Read on for the following 5 tips to help you get the best hvac system available at a terrific price. 1. Get At Least Three Quotes - At a bare minimum, you should get at least 3 quotes before proceeding with any work. If you have the time, consider getting 5 quotes. The more quotes you can get the more options you will have available to you. Be sure to get similar quotes so you are comparing apples with apples. 2. Offer To... (read more)

Author: James Fletcher

22. 4 Ways To Lower The Noise Of Your Air Conditioning System (HVAC)
May 29, 2009

The noise pollution caused by machines such as HVAC equipment can be very annoying and cause serious problems. As city's grow and blocks become smaller and houses are clumped closer together, the noise from air conditioners becomes a real problem. So are there ways to limit this noise from your hvac system? Below are 4 top tips to reduce the noise pollution emitted from your hvac system. 1. Choose An Inverter - Most inverter air conditioning systems are designed to be a few decibels quieter than a standard air conditioning system. If you are concerned with noise, or are choosing a large ... (read more)

Author: James Fletcher

23. The top 5 reasons you need to change your furnace filter
May 28, 2009

You're walking through the local super store and you come to the furnace filters section. You stand there and think "when did I change my filter last?" Did you know that not changing your air conditioner or furnace filter regularly can cause some serious issues! Here is a list of the top 5 problems: 1. Increased energy consumption 2. Increased wear and tear on HVAC equipment 3. Chance of life threatening conditions 4. Poor climate control 5. Reduced air quality 1. Increased energy consumption? When you don't change your air conditioner and furnace fi... (read more)

Author: Jamie Hanson

24. centrifugal compressors
May 28, 2009

Centrifugal compressors; also known as turbo-compressors belong to the rotor-dynamic type of compressors. In these compressors the required pressure rise takes place due to the continuous conversion of angular momentum imparted to the refrigerant vapor by a high-speed impeller into static pressure. Unlike reciprocating compressors, centrifugal compressors are steady-flow devices hence they are subjected to less vibration and noise. The working principle of a centrifugal compressor: The low-pressure refrigerant enters the compressor through the eye of the impeller. The i... (read more)

Author: Mohamed Fawzy

25. All about Geothermal
May 28, 2009

Geothermal Basics How does a geothermal heating and cooling system work? What makes a geothermal system different from ordinary systems? What are the components of a geothermal system? How much room do I need for a geothermal system? How efficient is a geothermal system? Is the efficiency rating actual or just a manufacturer's average? Do geothermal systems require much maintenance? What does geothermal mean for the environment? How does a geothermal heating and cooling system work? Outdoor temperatures fluctuate with the changing seasons but underground temperatures don... (read more)

Author: Henry Egg

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