The Utra tech Copeland scroll compressor unloads at 67% capacity. The scroll compressor is 95% efficient on high speed and 94% on low. This is why the scroll at this time is the number 1 compressor for residential application. when it works it works efficiently. However there is other factors for your over all application. coil size of evaporator, fan speed, coil temperature to regulate your TXV metering valve. ect.. Copeland states their 2 speed ultra compressors take 53% more humidity out of the air then their single speed compressors, I will have to find out what this means, is it combined with variable speed or just a constant cfm. Data on the 286B 2 ton 286B with FE4C-3 23,000 btu high 19,400 btu low 3 ton 286B with FE4C-5 36,000 btu high 29,400 btu low 3 ton 286B with FE4C-3 34,600 btu high 28,600 btu low what you want in a two speed system is for your system to run at low speed most of the time. It will take less energy and take out humidity. your 286B is similar to the 226A but with data control so since I'm in Fl and we don't have the 286B yet I will say that it should run around 4.8 to 5.5 amps in low spead around 8.5 to 10.5 amps in high. You want the high speed for the time of day that it is the most hot and days that it is very hot. two speed with variable speed air handlers have change the way we think or I think. And it has nothing to do with what the data specs say or what a computer tells me the thing should be. As we discussed most load calculations unfortunately are used for sales pitching. It's not the exact, it just gives a frame of reference so a professional can make his decision. No two programs will give you the same btu nor will two people give you the same end btu it's just a frame of reference. Data in is data received and we all perceive data differently. I've done loads since they came out on DOS back in 1989. It is only a guide for me not an end all. Let me say, that we can get even more precise, with a home energy audit and HERS rating with a blower door and duct blaster test. We can also grade your insulation, yes it's just not about R-value there is 3 levels of how the insulation was installed. It gets so ridiculous that it has become ridiculous. You may have to look at your home, see how your old system performed. Did it run all the time last summer? We had a hot and rainy summer last season. All these factors I use when I give a bid to a customer. I really focus in on the customer gut feeling too and what temperature is your comfort level. Many Manual J are based on 78F temp in side your home. Well what if you like it at 72F and what if it get's 98F and stays there for 2 weeks? Then this should be changed in the manual J for a proper rating. You know your energy bills, you know that the system before either ran too much or not enough, or it was pretty much out of site out of mind. The good thing is that over sizing is not like it was 10 yrs ago. There is variable speed air handlers and 2 speed compressors that can regulate humidity and your comfort level and this is what we are trying to accomplish, a comfort level in the most efficient way that doesn't cost a million banana's If there is a concern, you may want to look at the FE4C-3. it looses a .5 SEER but has less btu's and it is a slant coil that is much easier to clean. It is very hard for me to give advice since I have not physically looked at your application, but I do know you have a very good contractor that should take care of your needs.

Guys, I have gotten stuck in between two systems for my final decision. Please help me out to pick the right one. I am trying to decide in between these two ; #1 - Bryant 6129135 Active Systems BRYANT HEATING AND COOLING SYSTEMS PERFORMANCE 13 PURON HP BRYANT HEATING AND COOLING SYSTEMS 286BNA048****B CNPV*4821AL*+UI 1300 1040 315(A,J)AV048090 45500 11.50 15.50 46000 8.20 29600 1 HRCU-A-CB 355 1140 also includes - Evolution touchscreen thermostat and comes with free Bryant Air purifier - one year test drive - I don't know how it works but they say they will provide 100% refund if I am not satisfied with the system within a year from the installation date #2 - Trane 5768796 Active Systems XR17 TRANE 4TWR7048A1 4TXCD063BC3 1370 1090 *UD2C080B9V4 48000 12.50 17.00 45500 9.00 30400 1 HRCU-A-CB 342 1077 Yes Not include thermostat. will use exiting HW VP IAQ includes GPS-2400 plasma air cleaner price wise the Trane is roughly $200 more expensive than the Bryant after the tax credit is deducted Both contractor will add two returns and one supply and will fix the distribution issues in my current duct work. Based on the notion I got; both contractors are very capable and have very good reputation I am more inclined to Bryant due to evolution controls. I do know Trane is very reliable and efficiency wise it is a little more efficient compared to the Bryant system. to me $200 difference in price is very negligible. I just want to make right decision. I got stuck! PLEASE HELP...

Smart-HDL Introduce The Pro HVAC Module ALL your Air condition connection and control Problems now it solved with Smart-HDL, the New Pro HVAC Module and the intelligent DLP LCD Panel introduce you wide range of control 1 - DonÂt be confused, you can connect single Compressor Stage, Multi Compressor Stages both in 1 Module. 2 - Safety Running time: adjustable Running Sequences for Single and Multi Stage to safe your Compressor. 3 - Safety ON/OFF Protection: ON compressor, FAN safety adjustable delay time 4 - All Modes, Adjustable Cooling Heating, Auxiliary control. 5 - FAN Control: 3 Fan speeds as Low , Medium , High 6 - No Need Convertor: 24 VAC, 110VAC, 220VAC compressors and fans, all can be connected and controlled to the HVAC relays 7 - VAV control, 0-10 VDC controlling with adjustable High, Medium, Low voltage Output 8 - AHU Control, 4-20 mA output 9 - Auto Mode: to auto select between Cool, Heat, Fan in all your year seasons 10 - Adjustable: Temp sensor calibration built in the LCD panel to fit your real room temp. 11 - Extra sensors: Second Temp sensor/ Humidity input 4-20/0-10 V 12 - Diffrent calculation used LCD temp sensor, HVAC ext temp sensor, or Average between both for big halls. 13 - More control: can be control as master slave thermostat for 1 compressor for many DLP LCD panels 14 - Powerfull: each DLP Thermostat can control up to 8 other LCD Thermostat. 15 - Integration: smart-HDL also can control split AC by IR control, 3rd Party HVAC BMS system by RS232. Smart-HDL care about everyone in the world, to make your home healthy, saves your energy, educates you, and makes you happier. For more info, Manuals, Films and others you can visit our website http://www.smart-hdl.com For installation and Programming Film you can visit http://www.youtube.com/sbustraining

The biggest problem with HVAC zone systems is knowing when to choose it as a solution and when not to. Some HVAC companies it's about "sell, sell, sell" whether or not it works... there's more money in "sell, sell, sell" --- when it's only about money? So does the comment above mean I do it for free? No. If you think that you are reading things that aren't there. New construction? best to choose separate systems 9 times out of 10. In order for a zone system to work, you have to know what you are doing. Most HVAC companies staff (the techs they send you) are 20-30 year olds. How much practical experience could they possible have? It's best for HVAC zone systems to be an elegant solution. A HVAC zone system is a tool in the tool bag. Not all homes are suitable for zone systems. Some homes there is no other way, and in some cases complications to those problems will make an HVAC zone system design possibly more prone to problems. You have a problem now, do you want more problems. These decisions among others are decided "in person" --- so considering that becareful what information you decide upon from the internet. Just because it's here doesn't necessarily mean it's true. That said: Depending on equipment level chosen, how many different floors you have in your structure, how much room you have available... will all be factors that make you decide one way or another. From there it's in your best interest to pick a contractor that is skilled: especially when it comes to HVAC zone systems. (there's a lot of garbage out there.) (click to enlarge if necessary) I service the Katy, Texas area.