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

Views: 506

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

Jenna Bader posted events
9 hours ago
Sean Lintow Sr replied to mark avila's discussion Aeroseal Homeseal Pro unit for sale?
"As I recall you have to be a Aeroseal listed "distributor" aka installer to get the…"
17 hours ago
Paul Raymer posted an event

Radon Protections in New Homes at On line

January 30, 2018 from 1pm to 2pm
Radon-resistant construction is becoming a focal point in the high performance building industry.…See More
yesterday
mark avila posted a discussion

Aeroseal Homeseal Pro unit for sale?

Hello,We may be in the market to purchase a used machine should someone have one for sale.Cordially,See More
yesterday
Robert Zockoff liked Tray Biasiolli's discussion Two-stage furnace, control at furnace or thermostat?
yesterday
Profile IconKevin Jacks, Christine Elovecky and Bryan McIntyre joined Home Energy Pros Forum
yesterday
Kevin Jacks liked Diane Chojnowski's group Job Board
yesterday
Scott Doyle liked David Butler's discussion RESNET gets serious about modeling platform consistency
yesterday
Quinn Korzeniecki posted an event

BPI Retreat at HPC New York 2018 at Saratoga Springs, NY

February 12, 2018 from 12pm to 4pm
BPI will be hosting a retreat for BPI GoldStar Contractors, Test Centers, Proctors, and Certified…See More
yesterday
Quinn Korzeniecki added a discussion to the group Building Performance Institute (BPI)
Thumbnail

BPI to Host Retreat for Stakeholders on February 12th

BPI will be hosting a retreat for BPI GoldStar Contractors, Test Centers, Proctors, and Certified…See More
yesterday
Rhett Major posted an event
Thumbnail

Building Analyst - Energy Auditor Class at Conservation Consultants, Inc.

February 26, 2018 at 8am to March 2, 2018 at 5pm
Building Analyst - Energy Auditor class for BPI Certification, using Saturn Resources On-line…See More
yesterday
Barbara Smith's video was featured

ACEEE Report: How to Talk About Home Energy Upgrades

How can home energy assessments lead to more energy efficiency upgrades? Using a behavioral science approach to answer this question, we conducted an online ...
yesterday
Profile IconMichael W. Ford and Rob Vehring joined Home Energy Pros Forum
Wednesday
Luke Yang is now a member of Home Energy Pros Forum
Tuesday
KRicket Smith-Gary commented on Efficiency First California's blog post Is Health The Future of Home Performance?
"While discussing health benefits for various retrofits and new construction, please also keep in…"
Monday
KRicket Smith-Gary liked Efficiency First California's blog post Is Health The Future of Home Performance?
Monday
goodtidings comfort is now a member of Home Energy Pros Forum
Monday
Tina Baldt added a discussion to the group Job Board
Thumbnail

Hiring QC Specialist - Chicago/Evanston, IL

CMC is looking for a QC Specialist to join our growing team in the Chicago, IL area.Please see…See More
Sunday
Jim Gunshinan posted a blog post

Using God Talk—or Not—to Help the Planet?

I am always impressed with the work of Susan Shelton and the Shelton Group. So an email message…See More
Jan 12
David Butler posted a discussion

RESNET gets serious about modeling platform consistency

A critical element in ensuring the consistency of HERS Ratings is enhancing the consistency which…See More
Jan 12

Photos

  • Add Photos
  • View All

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

Badges  |  Report an Issue  |  Terms of Service