Can anyone suggest a good and easy to use program for load calculation please .
Has anyone used EMS HVAC load calculator? Thank you.

Views: 520

Reply to This

Replies to This Discussion

What is goal?   just to size the the house?  Cost the system?  Pay back on HVAC upgrade?  Pay back sealing building? How much do you do a year?  If just one a yr just MJ 5 or do it by hand.   If like me 3-4 a day then need it quick I will use design star / write soft and this will give pay back and pre sell the job.

Thank you Eric
I am just doing new homes and need to determine the size of equipments .i will be doing over 100 homes per year
Thank you for your help

I like Wright soft with drawing boxes,  I can run a load in 10 min whole house. room to room in 60 min.  I find the number a little high 20% if not using blower door  and right R- in  walls and attic. if building is rated very loose and end up tight then very over  in BTU's.   I like to run the heating system at design temp and see if it runs 100% at night, that's my goal.   Most systems are 300% to large around here  I see a 120,000 BTU and needs only 33,000 BTU at very cold design temp  or a 3 ton AC  after attic sealed and windows redone  just 2 ton is needed.  Look at the tablet whole house app.

Thank you so much Eric

I got to agree with Eric on WrightSoft - with that let me also add; get training on it. It is to easy to get the numbers wrong & it will help you make sure you aren't oversizing to much. With that they will also show you that Manual J is not the end all be all - you still have to work through Manuals S, T, & D and how to get it right using their software.

Elite software is what I use. The company also has tech support.

Wrightsoft. With the accurate inputs, full version, I have hit the actual design load--clocked meter- within 3% and one, which deliberately under-sized, anticipating unfinished improvements proved within 5%. 

The learning curve can be steep but we design radiant floors, walls, driveways and Unico high velocity as well as low velocity all with one brand. 

how did you prove the load is right?  This winter I am putting a hour meters on heating systems on a very tight buildings. I find 80% of systems are very over sized 3-4 times is very common   

Clock the meter under design conditions. 

do you find the gas gas meter to be off as much as 30% - more when old? Just  Change out the meter then gas cost go up?  I find the inside cups fill full  of "tar" like a carburetor, and bearing get coated.    

RSS

Latest Activity

Alan Lehman posted a discussion

Zehnder Comfopipe vs. rigid pipe

Hello All,I have installed few Zehnder systems and I am not sure if my rep is giving me the info I…See More
5 hours ago
Profile IconKatelyn Haas Conrad, Sandra James, arthur wilson and 1 more joined Home Energy Pros Forum
10 hours ago
Diane Chojnowski posted a discussion
12 hours ago
Brett Little's 2 events were featured
16 hours ago
Landon added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

BRAND NEW: Fantastic Software for Retrotec

I purchased a new blower door system from retrotec and it came with the fantestic software.…See More
yesterday
CEE posted a blog post
yesterday
CEE's blog post was featured
yesterday
Profile IconAnnette Young, Jordan Bowman, Ruben Martinez and 1 more joined Home Energy Pros Forum
yesterday
Brett Little posted events
Saturday
Ben Thompson replied to Stuart Perkin's discussion TrueFlow in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Stephen. Do you still have a Trueflow that you would sell? Ben Thompson,…"
Friday
Ben Thompson added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Wanted: TrueFlow plate

Seeking an Energy Conservatory TrueFlow plate (grid) in good condition. Ben Thompson.…See More
Friday
Scott Partlo replied to Jerry Needham's discussion Closed cell on roof deck to prevent mold.
"You say that 2" of closed cell foam is applied OVER the roof deck.  Where exactly was the…"
Friday
ayazfudugo1 replied to Tom Smith's discussion Are Energy Efficient Windows worth the investment?
"For both new and existing homes, Energy efficient windows are an important consideration Heat…"
Friday
Profile IconTodd Williams and Haley Keegan joined Diane Chojnowski's group
Thumbnail

Hall of Shame

In this group, members share an array of images from the field, showing the kinds of issues…See More
Friday
Todd Williams liked Diane Chojnowski's group Hall of Shame
Friday
Home Energy Magazine posted a blog post
Thursday
Leona Zoey posted a blog post

Landlords Are Your Friends

While it may be easy to forget given their apparent position of power over you, landlords usually…See More
Thursday
Ruben Martinez liked Diane Chojnowski's video
Thursday
Haley Keegan joined Building Performance Institute's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
Thursday
Donald Hester replied to Jerry Needham's discussion Closed cell on roof deck to prevent mold.
"For the roof shingle issue that is an unfortunate issue with many home inspectors that have been…"
Thursday

Photos

  • Add Photos
  • View All

© 2018   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service