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System Sizing. Proper System Design. Load Calculation Equipment Selection Duct Layout Branch runs Terminations Start ups Customer checks. The Next Step. Room By Room Load Calculation. Kwik-Way. www.spacepak.com Contractor assistance. Load Calculation.

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Proper system design
Proper System Design

  • Load Calculation

  • Equipment Selection

  • Duct Layout

  • Branch runs

  • Terminations

  • Start ups

  • Customer checks


The next step
The Next Step

  • Room By Room Load Calculation

Kwik-Way

www.spacepak.com

Contractor assistance


Load calculation
Load Calculation

  • Essential for a properly performing job

  • Shortcuts are not encouraged

  • BTUs not CFM!!!

  • Loads give you net values

  • Equipment discussed in nominal values


Load exceptions
Load Exceptions

  • Sensible vs Latent

    • Don’t add 1/3rd for latent

  • Sunrooms

    • Where does it face?

  • Commercial applications

    • Exceptional heat sources?


Load calculation1
Load Calculation

  • ACCA Manual J

    • Industry Standard

    • Currently revision 8

    • Not for commercial loads

    • Cautions in rooms with large glass areas

      • Use peak function for large glass areas

    • www.acca.org


Kwik way
Kwik Way

  • Runs from Internet

    • www.spacepak.com and then contractor assistance

    • http://www.spacepak.com/html/hvac_contractor_installation.htm

  • Quick program

  • Free

  • Does not keep files, must print out

Skip to

Equipment Selection



  • This was done off internet….

  • www.spacepak.com

  • Room by room analysis.

  • Totals load and suggests model and size.

  • Nice presentation tool.

  • Want a CD? Ask you salesmen….


ALTITUDE CORRECTION

Step One

  • determine atmospheric pressure at given altitude

5.2561

Altitude Pressure = 14.696x(1-6.87535E-06xA)

Where: A = altitude in feet


529.67xaxb

Corrected CFM =

14.696x(c+459.67)

ALTITUDE CORRECTION

Step Two

  • Correct CFM for Altitude

Where: a=pressure at altitude, b=specific CFM, c=entering air temperature


Equipment selection
Equipment Selection

  • Check systems capacity chart

  • Match to the load calculation

  • Data on internet

    • www.ariprimenet.org

    • Use mix match systems


Ari listing edited
ARI Listing (edited)

Model # SpacePak # Mfr SEER Matched capacity AEU

AC024X1222 345719 ESP-2430V+TDRLUXAIRE, 11.10 * 22600 * $171*

AC024X1222 345540 ESP-2430D+TDRLUXAIRE, 10.90 * 22200 * $171*


System design
System Design

Let’s do a house!



My mother in law s house
My Mother-In-Law’s house

  • 80’s Ranch.

  • On a slab

  • Attic space available

  • Windows are double pane, low “e”

  • Walls are R13

  • Ceilings are 8’ R19

  • Heated with boiler and baseboard (cooling only)

  • 70 by 38 ft.


  • This was done on internet….

  • www.spacepak.com

  • Room by room analysis.

  • Totals load and suggests model and size.

  • Nice presentation tool.

  • Want a CD? Ask your salesmen….


Where do i fit the equipment in
Where do I fit the Equipment in ?

  • Look for a central return grill spot

  • Horizontal or Vertical Unit

  • Spacepak in the attic or basement

  • Reaching the other floors w/ 2”

  • “I want the condenser behind the garage”

  • Commercial and multi-zone systems


Where to place the return
Where to Place the Return?

Central Location – Out of Direct Living Area


Air handler location
Air Handler Location

  • Return Air Duct Dictates Unit Location

    • Best Location for Return Air Grill

    • Split Return Air?

  • Unit Location Dictates Trunk Layout

    • Best Option for Trunk Layout?

  • Outlet Location: Dictates Trunk Run

    • How Many Outlets, Where do they go?



Outlet location

ESP-3642

Outlet Location

5190

606

3806

2748

4706

9910

2385

5935


Restrictors and Balancing:

Each 2”run will provide between 1700-2000 btu at a run length of 10’-20’

3 restrictor sizes

15%, 30% and 50%

Living room = 3 full runs

Family room = 5 full runs

How about the Dining room?

Needs two outlets but gain is only 2800 btu.

Use 2 30% restrictors on both runs. = 2800 btu

Runs must total 19 full open for 3642D – 850 CFM to get ESP to 1” and 1.5” W.C.


Outlet location1

5190

606

>

<

3806

2748

ESP-3642

4706

9910

2385

5935

Outlet Location


High static plenum
High Static Plenum

Will this pull

on fitting?

Short

runs

Long runs


Considerations
Considerations:

  • Want to keep runs as close as possible to 10 feet in length. Full 40 cfm and 2000 btu per outlet makes it much easier to balance…..

  • Generally less $$$ to run supply plenum extra distance than run long 2” runs.

  • Want to “premake” the 2” runs downstairs where it’s nice and cool!!!!


Suggested

Layouts


Plenum connection

5190

606

>

<

3806

2748

ESP-3642

4706

9910

2385

5935

Plenum Connection


Estimating the job
Estimating The Job

  • Good measurements can make you money

  • Old homes are gold but full of surprises

  • Refer to Spacepak’s Typical equipment list

  • Two sizes fit all

  • Spacepak is a premium product

  • Selling the extras


Airflow Considerations

  • Spacepak min. required outlets 14, 19, 26

  • Split or extended return duct

  • Filters

  • New air handler, old system


We never undersize

Conventional systems undersize for humidity removal

Difficult to keep up on 100° days

Space Pak’s 6 row coil

Humidity control built in

Size for the worst day

We Never Undersize


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