RHEEM UNITSIZE

Subject: Re: Fwd: Quick question about current HVAC planFrom: Randy Pollock ([email protected])To: [email protected];Date: Tuesday, April 8, 2014 9:49 PM

Hi Peter,

Any success with making the updates to the duct sizes ?

Please let me know where you are in the process.

I really need to get these changes completed ASAP so I can move forward with my contractor who is waitingto get the details.

ThanksRandy

On Thu, Apr 3, 2014 at 10:35 AM, Randy Pollock wrote:OK thanks. I didnt know the static pressure specs could change things.

On Thu, Apr 3, 2014 at 9:50 AM, Peter James Chin wrote:Thank you, Sir Randy.

I will get the specs from this model and recalculate. At a glance, it has a small external static pressure. It only hasan available of 0.2 while the Goodman has 0.5. But let us see what values we can get out of these.

-Peter

From: Randy Pollock To: Peter James Chin Sent: Thursday, April 3, 2014 4:56 AMSubject: Fwd: Quick question about current HVAC plan

Hi Peter,

Here is the specs of the air handler I had sent you before. It is model RGJD-12ERCM whichshoes 2000 CFM max.

Let me know what else you need.

Randy

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From: Randy Pollock Date: Wed, Feb 26, 2014 at 12:45 PMSubject: Re: Quick question about current HVAC planTo: Peter James Chin

OK, get some sleep sometime !

My mom is doing better, thank you for asking. She will see the doctor to day to give her a reporton her progress and talk about some additional surgery she will need.

I have attached the spec of the furnaces which have been purchased. They are the 120K BTUunits, they are model RGJD-12ERCM.

You can see the specs for the air flow. It says it ranges from 1200-2000 CFM. Not sure if thatwill change any of the load calculations or if using 1400 is best value.

I will try and chat later when I have some time.Randy

On Wed, Feb 26, 2014 at 12:28 PM, Peter James Chin wrote:I have to finish off pending jobs otherwise I get swamped, Sir. But I am still on top of the workloads so we cantake care of your design work with no glitches now. How is your mother doing, Sir?

From: Randy Pollock To: Peter James Chin Sent: Wednesday, February 26, 2014 9:25 AM

Subject: Re: Quick question about current HVAC plan

OK sounds good. Thank your for the quick reply. Shouldn't you be sleeping right now ?

On Wed, Feb 26, 2014 at 12:22 PM, Peter James Chin wrote:Good Evening, Sir.

I think we are in for a very detailed review with your contractor, Sir. And this is good since he is very thorough.Anyway I have all the design details here and I will give everything that you need as long as they are all here.Let us connect on Skype when you have the time, Sir. I will also go over each of these items and try toanswer them one by one.

From: Randy Pollock To: Peter James Chin Sent: Wednesday, February 26, 2014 8:55 AM


Hi Peter,

Do you have the details of the load calculations ? You had sent me summary earlier. The hvac contractor isasking for the details which include occupancy, heat loss, (See his question 5 below). When I originally sent


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you the load calculations in spreadsheet from previous engineer, it broke them out for bathrooms and bararea, and dining areas. If you have the load calculations to that detail, then please send. If not, that should befine.

Also, I noticed that on your last load summary you had sent a while back you had AHU1B as 3.4 tons andAHU1A as 5.2 tons cooling load. I see that AHU1A is the dining area closer to the kitchen and AHU1B is thisdining area on the South side of the space. Conceptually it seems that the AHU1B is a much larger area thanAHU1A. Can you confirm the load calculations you sent me where label correctly ? It would seem that AHU1Bwould have a higher load than AHU1A, since the area is much bigger and has many more window.

Also, there used to be a small supply duct running into the kitchen to supply the kitchen with someconditioned air. However, I see the duct is still there but is not connected into the system. Shouldnt this beconnected into the system ? I think it should be connected into the air handler that you currently have with a3.4 ton load which was labeled AHU1B, however because the kitchen is located next to AHU1A, it wouldseem that it would be more convenient to connect into that air handler.

I didnt notice any supply openings in the bathrooms, I thought there might have been at one time. If not, wedefinitely need to add one for each bathroom.

We definitely need to revisit the return air opening positions and types of diffusers.

My contractor had some concerns below, I have added some comments to them, please address them aswell, especially the duct sizing. I assume the duct sizing was based on auto calculations from the autocadsoftware, as the contractor felt they were over sized. The CFM values labeled on each diffuser, are thosecalculated automatically from your software based on the duct sizes feeding the diffusers ?

Also, the air handlers are two cooling speeds, 1200 and 2000 CFM. Your load calculations all show 1400CFM. Should you adjust the load calculations to reflect 2000 CFM ? Would the higher fan speed kick on whenthe units are at greater cooling capacity ?

From contractor:

Randy: After receiving the specs on the diffusers I met with my duct work and design guy. (third person to lookat these drawings). The following are just some of the items we came up with.1. The linear diffusers as shown, which I assume are the ones you purchased are not made for the type ofsystem you are planning. The are meant to work with a constant air flow VAV box system as you might find ina large commercial facility.Me: I believe he thinks because the linear slot diffusers are thermostatically controlled, they are controlling theair volume, however I believe they are only changing the air direction depending on the outside temperature.Thus I do not think this is a valid comment. I do not think we need a VAV system.

2. The number, location, and ratings for the supply outlets is excessive.

Me: We are at maximum cooling capacity for one air handler 5.2 tons, and with the other at 3.4 tons, butadding in some air flow to the kitchen area and bathrooms if not already included, we should be at maximumcapacity for the second air handler. As long as the CFMs calculated at each outlet are correct, and if you addthem all together and if they reach 2000 CFM per air handler, than I would think that the number of is correct?

3. The duct sizing is way to large for the equipment specified.

Me: Shouldnt this be calculated automatically by the software and would tell us if these are correct orincorrect ? How can we verify ? We have a restriction on the duct depth of 10", are the duct lengths correct orcan they be reduced based on the calculations ? Do we have any tables or calculations we can show that theduct sizes are correct ?

4. The use of flexible duct within a hard ceiling does not meet any codes in Chicago.


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Me: I assume we can change this to circular metal ducts instead of flexible ducts ?

5. If there is a room size, occupancy and heat loss schedule for the space than we might be able to reengineer the drawings. This would have to be an additional cost to the actual installation.

Me: Please send details of load calculations, I think the ones you sent earlier were just summary.

Lets talk later,Randy

On Tue, Feb 25, 2014 at 9:40 PM, Peter James Chin wrote:Absolutely, Sir. How about your mom, Sir? We hope she is doing all right. But we have to understand thatgoing to the hospital is part of our life. Much like a truck needs to go see a mechanic from time to time. I amglad that my own parents are both healthy and strong, Sir. We spent most of our time at the farm and thenature of work and the diet made a big difference in our family's health. And another thing is that I finallyhad my plumbing and electrical guys back at the office. They were out most of the time doing constructionwork on the field so I was not able to work at the upper levels right away. But since they are here, includingthe structural engineer, then we can continue working.

From: Randy Pollock To: Peter James Chin Sent: Tuesday, February 25, 2014 10:42 AM


Hi Peter,

Sorry for not getting back to you. I have been spending some time in Arizona, where my mom has been inthe hospital.

I am back in Chicago and will try and get in touch with you. I have a contractor involved and has somequestions about the duct sizing. I am going to see if I can get him on Skype with me and you at the sametime. Can you do a 3-way call on Skype ?

Randy

On Thu, Feb 13, 2014 at 11:16 PM, Peter James Chin wrote:Good Evening, Sir Randy. Do you have the time to be on Skype? We need to discuss the changes on theplans when you have the time. Thanks!

From: Peter James Chin To: Randy Pollock Sent: Tuesday, January 28, 2014 8:52 PM


Good Evening, Sir Randy. Let us connect on Skype when you have the time, Sir. I have to explain thechanges to you. Thanks!

From: Randy Pollock To: Peter James Chin Sent: Tuesday, January 28, 2014 6:41 AM


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Hi Peter,

Did you look at the two PDF versions I sent you (they are both items you had sent me earlier) , i.e., the11-05 and the 12-23 version of M1 ? By that time we had already settled on the air handler. I believe theonly change that was supposed to be made in the 12-23 version, was to replace the ceiling mounted2'x2' return grill with a ceiling mounted linear slot diffuser as to keep the aesthetic requirements I waslooking for. This should not have required moving the air handlers above. It should have just requiredexchanging the square diffuser for the linear slot diffuser and the connect made between them and thereturn air duct system.

Regards,Randy

On Mon, Jan 27, 2014 at 11:50 PM, Peter James Chin wrote:Good Morning, Sir Randy. Let us connect on Skype when you have the time, Sir. We need to discussthe changes since there were a direct result of the changes that we made on the kitchen area. Thelocation and access of the air handlers got affected when we made changes on the kitchen. T

From: Randy Pollock To: Peter James Chin Sent: Wednesday, January 22, 2014 6:30 AM


Hi Peter,

I hope all is well.

I just had a chance to examine the 12-23-2013 version of the drawings you sent me. The only changethis should have included over the previous version 11-05-2013, was to replace the 24" x 24" squarereturn grill in the ceiling area between the north side of the bar and the south side of the bathroomentrances, with a linear slot diffuser.

However, when I examine the two versions of the drawings , 12-23-2013 vs. 11-05-2013, I just noticedthat you changed the location of the AHU1B, and instead of it being staggered with the location ofAHU2B, both air handlers are parallel and you have changed the access to the air handlers in theceilings of the bathroom underneath instead of access on the side of the ceiling through the hallway tothe kitchen.

I do not agree with this change. I am not sure if it was just an accidental change. However, I need youto update the drawings such that the location of AHU1B is staggered again with the position of AHU2Band in the same location as you had in the 11-05-2013, and as well move the supply and return ductwork back to the location of 11-05-2013.

Could you change that back as in 11-05-2013, but leave the linear slot diffuser in the ceiling next to thebathroom. Could you then please re-send me the .pdf files and the updated dwg file ?

Thanks very much,Randy

On Mon, Dec 23, 2013 at 12:07 AM, Peter James Chin wrote:Okay, Sir. I will add one supply diffuser on the ceiling near the bathroom hallway. I will remove the


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24x24 return grille. Please check the revised drawings here, Sir. The Shop Drawing should takeabout 2-3 days since I have to draw the whole plan in sections and magnify each view so all theminute dimensions will be visible.

From: Randy Pollock To: Peter James Chin Sent: Monday, December 23, 2013 8:31 AM


Thank you Peter.

Because of the requirement to have a completely finished ceiling, other than the linear slot diffusers,we cannot put that 24"x24" grill in the ceiling there by the bar/bathrooms.

Either we can place another couple linear slot diffusers in the ceiling in front of the bathrooms (I needto count how many I have and if there is enough) but tie them in the return system,

or we can put a thin, long louver/grill (maybe one or two lovers) in the wall in front of the bathrooms,near the ceiling.

How fast could you make the shop drawings, I need to post the project on a contractor site to getbids asap.

The cooking hood and makeup air, I already contracted that with an installer so would not need shopdrawings for that.

ThanksRandy

On Sun, Dec 22, 2013 at 7:47 AM, Peter James Chin wrote:Hello there, Sir Randy. Attached are the Autocad file as well as sample of a Shop Drawing.

From: Randy Pollock To: Peter James Chin Sent: Sunday, December 22, 2013 2:37 PMSubject: Re: Quick question about current HVAC plan

Hi Peter,

Happy Holidays to you as well. I hope a healthy and happy New Year to you in you family in 2014.

Regarding those return grills, I believe those should have been taken off the drawings. We had alarge return grill in the ceiling over the hallway leading from the dining room to the kitchen. Thereturn grill for the other air handler is in the ceiling over the small open utility room at thesouth/west side of the bar.

Are the shop drawings something that can be generated automatically from the existing autocadfiles ?

I was thinking of attaching the drawings to a contractor site so that they can bid on the project. Iwas going to use what ever is available. I might need to the autocad file format to upload as wellas pdf version


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Randy

On Sun, Dec 22, 2013 at 12:25 AM, Peter James Chin wrote:Merry Christmas to you and your family, Sir Randy! Wish you good health all year long also!

As for these three boxes, those are Return Air Grilles. And it looks like you got the old drawing. Ihave already sent you the final draft about a month ago. But anyway let me resend you theupdated one as attached here. Please use this instead.

Please note that these are still design drawings, Sir. I need to talk with your local ProfessionalEngineer to sign off the plans or to your builder or contractor who is going to build it so I canintegrate their preferences also. These design drawings would have to undergo another set ofchanges, Sir. The contractor or builder will need to have "Shop Drawings" for this one. Shopdrawings means the detailed drawings that magnify each section or area together with thedimensions to help the production of each duct run. The HVAC contractor will need to determinehow many plain sheets is it going to take and the shape and size of each. Let us connect onSkype when you have the time, Sir, so I can explain this to you further. Thanks!

-Peter

From: Randy Pollock To: Peter James Chin Sent: Sunday, December 22, 2013 5:56 AMSubject: Quick question about current HVAC plan

Hi Peter,

I was looking over the HVAC plan and noticed 3 squares with 'X' in the middle, on top of some ofthe main duct lines. They have a caption '24"x24", but no other description. Could you tell mewhat those items are ? I highlighted the area in yellow in the attached pdf. Could you also sendme the autocad files that contain the latest version of the plans.

ThanksRandy


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