Air Cooled Portable Air Conditioning Units Water Cooled Portable Air Conditioning Units...Check out our New 5-ton units! Portable Heating and Cooling Units Meet our Newly Redesigned 5-ton Water Cooled Units..........OWC and PWC seriesWritten For the projects of our customers we use the following data for the design of the electrical installation:1. - 3.5 ton AC, environmentally friendly R410A, split system, with both condenser and air handler, central air conditioner system.2. - It is equal to 42000 BTU of capacity.3. - Power supply of 208-230/1/60.4.- Rated current of 22.1 A.5. - 16 SEER Efficiency.At acquisition and installation time we verify the data from the manufacturer of the AC and we make the changes if any.Written This will depend on the weather! If it is especially hot outside the AC will have to work harder to cool your space. It is impossible to give you an accurate answer to the question, but sometimes estimates can be made based off of typical load profiles in your area.

Benjamin LyddaneWritten This question is under-specified. The energy use depends on the time during which the compressor and fan are working, and on the efficiency of the device and on the temperature difference between inside and outside.The ton unit is a hold-over from the days when blocks of ice were delivered: in your case 3.5 tons a day. It is easy, but misleading, to work out the thermal energy stored in a block of ice when heated to room temperature ~ it is about 3.5 kW per ton of ice melted in a day.(12000BTU/hr in American units) But it is rather strange to realize that air-conditioning is one of those rare devices that give out more thermal energy than the electrical energy they use. This ratio called COP can amount to an efficiency of 300% to 1000% though air conditioners are not usually rated like this, but in a peculiar mixed unit ratio called EER, Energy Efficiency Rating which mixes BTU (output) divided by watt.hours (input) as the efficiency measure.If units are converted to a uniform system, EER is like COP (Coefficient of performance) using a scaling factor in this way:(EER) BTU/hr /watts = (COP) Watts out / watts input all times 0.293Until recently, efficiency as EER as low as 6 was permitted.

Now AirCon units must be at least EER 6 and better is 12.Let’s suppose your 3.5 ton unit is brand new and moderately high efficiency. That three and a half tons of ice represents 3.5 X 3.5kW thermal power divided by the efficiency multiplier now easily available (COP = 3.5) and we end up with 3.5kW as an estimate for the electrical power, consumed for as many hours as the outside temperature is too hot. And that gets us to Seasonal SEER - but I won’t bug you with that.Updated I think it is 3.51KW per RT [refrigeration ton], although that does not account for inefficiencies.1 RT = 12000 BTU/hour.Refrigeration tons to kilowatts (kW) conversion calculatorwleWrittenStay cool and comfortable when it heats up outside with a central air conditioner you can rely on.  Our home air conditioning units keep your home cool on the hottest days with reliability and efficiency you can count on year after year. AccuComfort™ Variable Speed Platinum 20 Air Conditioner A system that works smarter.

Our AccuComfort™ Variable Speed Platinum 20 Air Conditioner comes with AccuComfort™ technology that allows the system to consistently adjust to run at a more efficient speed to maintain your personal level of comfort. air conditioner outdoor unit dimensionPlus, with up to a 21.00 SEER rating, this A/C system is one of the most efficient multi-stage cooling units on the market.central air conditioning unit not cooling problem Up to 21.00 SEER3 ton ac unit ratings Multi-staged cooling with maximum comfort and humidity control Quietest operation compared to nearest competitors Watch a quick video to learn more. AccuComfort™ Variable Speed Platinum 18 Air ConditionerOur AccuComfort™ Variable Speed Platinum 18 Air Conditioning System comes with AccuComfort™ technology that allows the system to consistently adjust to run at a more efficient speed.

Plus, with up to 18.00 SEER, this variable-speed A/C is one of the most efficient home air conditioners on the market. Gold 17 Air Conditioner This home cooling system's design keeps you comfortable, thanks to generous two-step cooling.  Plus, with ratings up to 18.00 SEER, this central air system provides incredible energy efficiency saving you on operating costs.Talk to one of our dealers. Silver 16 Air Conditioner Get efficient performance with this energy-efficient air conditioner that may qualify for an energy tax credit.**  Built with you in mind, this home air conditioning system's durable design will help you beat the heat year after year. Silver 14 Air Conditioner The latest introduction to our air conditioning line, providing homeowners with excellent comfort and savings.  The Silver 14's design provides your home with the reliable cooling you would expect from American Standard and the efficiency you require from a new central air conditioning unit.

Single-stage cooling with consistent comfort Silver 13 Air Conditioner With the Silver 13 central air conditioning unit, you do not need to sacrifice impressive comfort for energy savings.  This A/C system's design provides your home with the reliable cooling you would expect from American Standard and the efficiency you deserve from a new central air conditioning unit. Single-stage cooling and consistent comfort Silver Series SI Air Conditioner Reliable American Standard Heating & Air Conditioning at its most affordable. Consistent comfort through single-stage cooling Peace of mind that's easy on your wallet Compare up to 5 products. Sign up or log in to customize your list. Background: Our two-story house is about 3,000 square feet. When we bought it last year, it had two separate AC units, a 2.5 ton and a 4 ton. They were both old and died last month. We had them replaced with a single 5 ton unit, with two zones controlled by dampers (the original ductwork was merged into a single supply).

The contractor insisted that 5 tons (versus the original 6.5) would be fine since the new system was much more efficient. It was very hot today (pushing 90) and I noticed that regardless of what I had either thermostat set to, it just kept getting hotter and hotter. I felt cool air blowing out of the vents, but it simply wasn't cooling the house. I got an emergency technician visit and he checked everything and asked me about the previous system. He came back inside and said, "We screwed up." It seems the 5 tons is not adequate for the heat load this house experiences. Although the system is working perfectly, it just can't cool both zones at once. As a temporary workaround, he suggested running just one zone at a time. The warranty manager is going to call me tomorrow. I want to understand the options. I thought the technician said the 5 ton unit we have is the "largest residential unit available", so replacing it with something bigger might not be possible. What else could be done here?

Could a second condenser be added? Is there some other way to beef up this system? Hopefully the company will "make this right" as the technician said. But given that they apparently made a mistake on sizing it, I'm not confident they'll make the best recommendation. I'm not a HVAC expert but a 5 ton unit sounds pretty large for a 3000sqft house. You can probably approach this in one of two ways. One is probably what the previous owner did and just throw more cooling capacity at the problem (two units, larger units, etc.). Alternatively, you can start looking at ways to get more out of your existing unit. Some things that might help: If your windows are old, consider replacing them with more efficient windows Find and plug sources of air leaks - doors, windows, electrical outlets and other exterior openings Plant trees and shrubs to help shade the house Install ceiling fans to help circulate the air Add insulation to the exterior of the house (requires replacing siding usually)

Seal all duct work with proper HVAC tape to prevent leaks Replace your air filter Install an air exchanger The benefit of trying some of the above is that they also help when heating. I have a 3,200 square foot home (2,800 down and 400 up) that has a single 5-ton unit with three dampered zones and one "dump" zone. I live in South Texas and we have dozens of 100+ degree days every summer. My system is able to hold the house easily at 74 degrees in all zones even when it is 100 degrees outside. A few thoughts: First my home is relatively new (6 years) and has efficient windows, radiant barrier in the attic and is well insulated. Our dump zone that runs any time one of the dampered zones calls for air is in the kitchen - always the hottest room in the house and this helps to keep the busiest area in the house cool. This also helps bleed off supply from the other three zones making sure the unit runs long enough to adequately cool and dehumidify the house. It is a simple but elegant solution to the challenge of too many zones running for short periods of time.

I also have the zones set where the dampers don't close all the way - providing a bit of a "leak" to keep air moving in the entire house when one zone is running but the others aren't. I had the builder put in lots of return air. I have five ceiling mounted filter grills in the house to keep the unit well supplied with return air and to maximize filter effectiveness. The slower the air moves across the filter the quieter and more effective each return will be. This also helps to even out the temp in the house since it isn't all going to one large filter. I have three 12X12 filter grills, one 12X24 and one 20X30. Finally - I have a Z type evaporator coil in the air handler rather than the standard V shaped one. This allows my 5 ton unit to maximize efficiency and increase the surface area of the large volume of air moving across the coils. I didn't even know this existed when we built six years ago - but it works great. Like I said - I easily keep our house at 74 even when it is 100 outside - and could keep it cooler - I just don't for budget reasons.