This Article is About
floor insulation
exterior siding
exterior doors
heat loss
peace of mind
Hvac Load Calculation
Join 1000's of Authors at StreetArticles Today!

How do they determine what size Air Conditioner you need?

What are some things that you should require from your Air Conditioning Contractor before you sign a contract? Make sure he is Licensed and Bonded, if you do not know him ask for references and then check them out. Ask him what size unit he is proposing and how he arrived at that tonnage. A good Air Conditioning Contractor will always run a load calculation on your home first, this removes any guess work and gives both of you peace of mind.

The load calculation, based on Manuel J, will take many things into consideration, such as, how much insulation you have in your ceiling and walls, if it is on pier and beam they will also take the floor insulation into consideration and whether it is under pinned or not. The height of your ceilings, the square footage of your home, the type windows you have, the size of your windows and which direction they are facing. You exterior doors, size, type and direction they are facing and the type of exterior siding on your home.

Load calculations also take in consideration how much infiltration your house has. they will need to know how many people are in your family and if you entertain guests, if so how many on the average. The contractor should also ask you what you expect out of your A/C system. All these figures determine how much heat gain, for Air Conditioning purposes and how much heat loss, for heating purposes your house has in terms of BTU's. They should also run a load calculation on each individual room to determine how much air is required for that particular area.

in Air Conditioning terms 12,000 BTU;s is equivalent to one ton of air conditioning, so if you have a 48,000 btu heat gain then you would need a 4 ton unit. A 4-ton Air Conditioning unit should have an Air handler that will produce a minimum of 400 cfm of air per ton, or 1600 cfm. Depending on the brand, some will move 1800-2000 cfm while others will move 1600 cfm. This will determine how you size your duct system!

The Duct system is the "Heart of any Air Conditioning System", without a properly sized duct system it doesn't matter what type unit you have you will never be satisfied.Usually residential systems are based on .08 static pressure, example: a 6" duct will move 100 cfm of air, 7" will move 150 cfm & 12" will move 600 cfm etc.

Sizing the return air chamber is of critical importance, you should have at least 1 sq. ft. of Return Area per ton of Air Conditioning, example: with a 4-ton system multiply 144sq. inches x 4-tons and you will have the necessary area of R/A grill opening for a 4-ton system, so you will need 576 sq. in. of return air grill. That could be one-12x48" grill or 2- 12x24" R/A grills. If you set your system up like this you will have a quiet system that will operate at maximum efficiency.

Street Talk

No comments present
You May Also Like
Save on High Winter Heating Bills - Stop Attic Heat Loss
Before autumn turns to winter, take some time to inspect your weatherstripping and insulation. You can cut those high winter heating bills by making sure your house is well weatherstripped and your attic floor insulation is sufficient. Follow these and the other energy-saving tips listed below and cut those high…
By: John Dove in  Home Improvement  >  DIY   Sep 19, 2011  
  Likes: 0

Dog Kennel Designs
dogs play an important part in providing home security so we can only reword them by providing shelter and good nutrition ,however today we are going to look at some free house dog designs which include the follewing asheville humane soceity dog house asimple but function dog house with gently…
By: mpimbye in  Writing and Speaking  >  Writing Articles   May 24, 2011  
  Likes: 0

Acklins The Island Of Therapeutic Tropical Breeze #3
The next few days, we replaced the damaged exterior doors and windows. It was not long afterward that the lumber ran out. So while we waited for a new shipment of lumber, we spent our time sport fishing, relaxing and visiting the many settlements of the island. The second shipment…
By: Alfred DeCosta in  Travel and Leisure  >  Destination Tips   May 08, 2012  
  Likes: 3

Why Leds Are Used Commonly In Manufacturing Unit?
LEDs are most commonly used in for residential, commercial due the numerous benefits that can be availed from these lights. Installing low energy LED in the commercial, industrial, office-based industries has increased due to the numerous benefits LEDs gives. Due to the numerous advantages LEDs gives, preferred to use from…
By: Lighting RetroFit in  Home Improvement  >  Energy Efficiency   Jun 08, 2016  
  Likes: 1

Houston Solar Panels Encourage People Towards Green Environment & Saving Money
One of the most important reasons why Houston solar panels are appreciated worldwide is their amazingly capability of producing electricity and fulfilling various power needs of many households across the U.S. Solar panels are a sort of devices which are primarily used to convert light into electricity. Sun is the…
By: James Macken in  Home Improvement  >  Energy Efficiency   Jun 03, 2016  
  Likes: 1

How to Choose the Right LED Lighting For Interior?
LED lighting for homes is the best method for interior home lighting today. While LED lights are not inexpensive, the long lifetimes and low power use made them the best choice for home and official use. LED lights can be used for interior and outdoor lighting to increase the beauty…
By: Lighting RetroFit in  Home Improvement  >  Energy Efficiency   May 31, 2016  
  Likes: 0

Enhance Home Decoration With Beautiful Wall Lights
A good interior lighting design is important as it can be used to create any level of your lighting design, giving you flexibility with your interior decor. Wall lights are used widely in many houses to decorate the room or a specific area. These lights provide security at a door…
By: Lighting RetroFit in  Home Improvement  >  Energy Efficiency   May 28, 2016  
  Likes: 0

How Flood Light Fixtures Are Energy Efficient?
LED is Light Emitting Diodes are solid light bulbs that are energy-efficient. When first used these were limited to single-bulb that was used in applications like instrument panels, electronics, pen lights but now in the recent days as the popularity is increasing people are preferring to use in outdoor and…
By: Lighting RetroFit in  Home Improvement  >  Energy Efficiency   May 16, 2016  
  Likes: 0

Introducing A Home Solar Energy System for Your Home
As it has turned out to be increasingly hard to have the capacity to bear the cost of the increasing expenses of vitality from your neighborhood hydro supplier, numerous individuals have begun hoping to produce their own power with a home sun powered vitality framework. They should simply catch the…
By: Zeeshan Ahmad in  Home Improvement  >  Energy Efficiency   Apr 18, 2016  
  Likes: 0

Subsidized Insulation Solution By Local Governments Is Key To Energy Conservation
Winter is a month away and already the whole country is up in arms about the possibility of increases in electricity tariffs. This is time when many of us see the cost of energy consumption in the home almost double. The reason is not far-fetched; in this season the temperature…
By: Dan Boateng in  Home Improvement  >  Energy Efficiency   May 23, 2013  
  Likes: 0

Solar is One Of the Highest Yielding, Safest Investments You Can Make!
Putting aside all of the social and ecological advantages , Investing in a solar system for your home or business is one of the highest yielding, safest investments you can make. The “Solar Perfect Storm” is here right now with average system paybacks in the 3-5 year range and return…
By: Laura5 in  Home Improvement  >  Energy Efficiency   Jan 30, 2012  
  Likes: 0

Which Of These Hidden Problems Lurk Beneath Your Home’s Stucco Exterior?
Noise. Dust. Unexpected delays. Unexpected expenses. A never-ending line of decisions for you to make. Does any of this sound familiar? If so, then you’ve probably done home remodeling in Phoenix in the past. On the other hand, if you’re gearing up to do your first-ever home remodeling project, then…
By: Brittney Davis in  Home Improvement  >  Energy Efficiency   Aug 22, 2014  
  Likes: 0

Solar Panel Information- Solar Energy for Your Home
Saving money is top priority especially in today's economy. All the buzz about solar power is exciting but can be very confusing! Companies dedicated to advancing green energy are promoting solar panels for your home to help reduce electric bills and make homes run cleaner. They say you can DIY…
By: Solar Stella in  Home Improvement  >  Energy Efficiency   Sep 02, 2011  
  Likes: 0

Diy Solar Panels Cost A Fraction Of the Price Of Commercially Sold Panels
Renewable solar energy is an exciting technology that came with a great promise of reducing energy costs for an average household while saving the environment from carbon emissions at the same time. However, for some reason, the commercially produced solar panels for homes have failed to break the cost barriers…
By: matt2 in  Home Improvement  >  Energy Efficiency   Jun 18, 2011  
  Likes: 1

When to Hire Domestic Energy Assessors North West
If you have been thinking that it is time to move on to a new home and would like to sell your current one, you should know that there are certain steps that you need to follow. Besides talking to a real estate agent, you will need to get in…
By: Johny Deanes in  Home Improvement  >  Energy Efficiency   Nov 13, 2015  
  Likes: 0

Article Views: 2122    Report this Article