Engineering Analysis

How to do an Engineering Analysis, Load Calculation, Heat Loss Heat Gain, Etc.

 

• From the home page select “My purchase orders” (left of the page)

• Select “+New order” (top of page)

• First enter the client information

• Select the “Engineering Analysis” tab at the top of the page

• Enter the correct information in the following fields

• When adding bedrooms and people living in the house total them together as one number

• The wall measurement is the exterior walls

• You can add items by selecting “+Add Items”

• Add all the necessary items

• Select the “View Details” button (top, right of page)

• Print out or e-mail the page

Basic Video

 

Room By Room

 

Additional Help understading what to do.

In all cases, the example would be a two story house with a basement. Outside wall dimension of 25 by 40, for a total square footage of 3000 sq ft. (including basement)

 

example 1:

Basement completely below grade, unfinished. How are walls and floors done? "Floor" would just be the main floor square footage, is that right? Under what option? (basement-unfinished?)

And basement walls do not go into the wall calculation if the basement is not conditioned, is that right? If the basement does receive conditioned air, how is the Floor done?

2 story house - Walls

• Perimeter 25+25+40+40 = 130
• Ceiling height MLA 9', ULA 8'
• Walls would be 130x17

If basement is unfinished and will remain that way you do not count Sq Ft

Floor:

25x30 and choose unfinished basement

Heating SQ FT = MLA = 750, ULA= 750, BLA 0 = 1500 - You don't need to count the basement SQ FT as it in not finished but they may consider finishing and would add it in.
Cooling SQ FT = MLA = 750, ULA= 750, BLA 0 = 1500

example 2

basement 100% finished, below grade, walls are insulated. How are walls and floors done? Floor would be the square footage of the basement, is that right?

If that is correct, why is there a cooling load for a finished basement floor?

2 story house - Walls - walls in basement.. 1/2 of basement height is under frost line so only count half... "you don't have to do this as the number will not be all that far off so if you exclude basement walls you'll still be fine"

• Parimeter 25+25+40+40 = 130
• Ceiling height MLA 9', ULA 8', BLA 8' = 1/2 basement 4'+8'+9= 21
• Walls would be 130x21

If basement is finished

Floor:

25x30 and choose finished basement

Heating SQFT = MLA = 750, ULA= 750, BLA 750 = 2250
Cooling SQFT = MLA = 750, ULA= 750, BLA 0 = 1500

Example 3

Basement below grade, half finished, half unfinished. In the finished half the walls are insulated. In the unfinished half the walls are bare cinderblock. How are Walls and Floors done?

2 story house - Walls - walls in basement.. 1/2 of 1/2 of basement height is under frost line so only count half... "you don't have to do this as the number will not be all that far off so if you exclude basement walls you'll still be fine"

• Parimeter 25+25+40+40 = 130
• Ceiling height MLA 9', ULA 8', BLA 8' = 1/2 of 1/2 basement 2'+8'+9'= 19'
• Walls would be 130'x19'

If basement is partially finished

Floor:

12.5x15 and choose unfinished basement

12.5x15 and choose finished basement

Heating SQFT = MLA = 750, ULA= 750, BLA 375 = 1875
Cooling SQFT = MLA = 750, ULA= 750, BLA 0 = 1500

Example 4

Basement 100% finished, 1/2 half below grade (slopes down from the front to the back of the house, giving a walkout basement.

2 story house - Walls - walls in basement.. 1/2 of basement height is under frost line so only count half... "you don't have to do this as the number will not be all that far off so if you exclude basement walls you'll still be fine"

• Parimeter 25+25+40+40 = 130
• Ceiling height MLA 9', ULA 8', BLA 8' = 1/2 of basement 4'+8'+9'= 21'
• Walls would be 130'x21'

If basement is finished

Floor:

12.5x15and choose finished basement

12.5x15 and choose slab edge insulated

Heating SQFT = MLA = 750, ULA= 750, BLA 750= 2250
Cooling SQFT = MLA = 750, ULA= 750, BLA 375= 1875

Example 5

Same as example 4 but there is a slab that extends out the back of the house from the walkout basement. How are floors done? There should be an extra heat load from the outside slab if it is not insulated from the house. (most of the times it's not.)

see above

• Some things to consider...
• Any future remodels planned?
• Desired temp for client summer and winter.
• How their system performs now and size installed.
• Duct sizing.

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