Greetings everyone, 

    I was wondering if anyone could help me with this error, TREAT is saying that the primary heating system capacity adjusted by distribution and heating safety factor exceeds its assigned share of building load by more than 50%.

   The heating information came from the energy audit, so I am not sure how I can correct this error. Any help will be greatly appreciated, 

   Luis

Tags: factor, heating, safety, treat

Views: 126

Replies to This Discussion

Luis, Good Evening, John of NY Construction Pros here.

I don't think you need to worry about this warning from TREAT too much.  All it means (as I understand it) is that the primary heating appliance is too large in its Btu capacity for the house.  I get this warning often.  We ignore it.  If you receive the other warning; that the capacity is TOO SMALL, this matters but if it is to big, it doesn't matter.  Check with PSD Consulting for the definitive answer but I say, don't worry.  I hope this helps.

John WL, Yorktown heights NY.

It is very common to find equipment grossly oversized. I mean 1.5 - 2x Manual J and 2-3x the size the house needs. 

It's our experience that TREAT load calc is very close to Manual J - which tends to oversize equipment by 15-40% depending upon how well you intend to fix the home.

(Just one of many examples - I have a client with a 6500 sf 1920's brick mansion that the load calc is 140,000 btu, and the house carries 70° to 5° f outdoor with roughly 60,000 btu. We can prove this through Ecobee logging: http://bit.ly/4ecobeethermostats - And this house still has leakage in excess of 5000cfm50.)

We have realized tremendous comfort and energy savings from aggressively downsizing. Our process is to downsize equipment until we get an undersized warning, then we know we are in the ballpark. If you don't get an undersized warning you are probably too big.

We don't have outdoor ductwork in our area. I would be very careful doing this with outdoor duct unless you are sealing and insulating on levels similar to these guys: http://bit.ly/ring4club

RSS

Discussion Forum

Basic Heat loss information

Started by Luis Hernandez. Last reply by tedkidd Oct 30, 2014. 1 Reply

How to model a skylight

Started by Luis Hernandez. Last reply by Luis Hernandez Oct 16, 2014. 2 Replies

Modeling the apartment upstairs

Started by Luis Hernandez. Last reply by Ethan MacCormick Sep 26, 2014. 2 Replies

Modeling a Townhouse

Started by Luis Hernandez. Last reply by Luis Hernandez Jul 7, 2013. 4 Replies

Latest Activity

CEE posted a blog post
1 hour ago
Sean Lintow Sr replied to Chris Bellanca's discussion Overheating garage
"There are only two methods - block the heat before it gets in & exhaust what gets in Blocking -…"
5 hours ago
John White posted photos
12 hours ago
John White posted a blog post
12 hours ago
Rob Madden posted a discussion

E&O Insurance

Any recommendations for a good E&O and general liability insurance carrier for energy…See More
17 hours ago
John Redmond added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Flir I7 Infrared Camera (Barely Used)

I have been away from this site for a while, so my apologies if this is supposed to be posted…See More
19 hours ago
John Redmond joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
19 hours ago
Hannah Wood liked Quinn Korzeniecki's discussion Application Period for 2018 Energy Auditor (EA) and Quality Control Inspector (QCI) Pilots Now Open
21 hours ago
Quinn Korzeniecki posted a discussion

Application Period for 2018 Energy Auditor (EA) and Quality Control Inspector (QCI) Pilots Now Open

We need you!Applications are now being accepted to participate in the 2018 Energy Auditor (EA) and…See More
21 hours ago
Quinn Korzeniecki added a discussion to the group Building Performance Institute (BPI)
Thumbnail

Application Period for 2018 Energy Auditor (EA) and Quality Control Inspector (QCI) Pilots Now Open

We need you!Applications are now being accepted to participate in the 2018 Energy Auditor (EA) and…See More
21 hours ago
David Butler replied to Chris Bellanca's discussion Overheating garage
"Easy... insulate the attic ceiling. I'm not sure how much good it would do to air seal a…"
21 hours ago
Chris Bellanca posted a discussion

Overheating garage

Hi all, I'm looking for potential solutions to a problem at a client's house.  The south facing 2…See More
23 hours ago
Landon added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Brand new retrotec blower door system $3000

Hi, I’ve got a brand new blower door system from retrotec that I got 2 months ago, and never got…See More
23 hours ago
John Redmond posted discussions
yesterday
David Holtzclaw replied to David Holtzclaw's discussion GSHP for domestic hot water
"Thanks John & Bill. Bill your experience is one reason why I wanted a larger heat pump with…"
yesterday
Diane Chojnowski posted events
yesterday
Rob commented on Bob Krell's group Healthy Indoors (IAQ)
"Hello, Has anyone tried custom filtering of window AC units? Specifically concerned with…"
yesterday
Michael Dunseith's 2 photos were featured
Wednesday
Franco Oyuela commented on Perry Ning's blog post Warnings About Portable Air Conditioners
"Here are the top five benefits of owning a portable air conditioner: 1. Low Price – All…"
Wednesday
Daniel Baur-McGuire commented on Kurt Shafer's status
"Whole house fans are a scam if you use air conditioning. Seriously "
Tuesday

Photos

  • Add Photos
  • View All

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

Badges  |  Report an Issue  |  Terms of Service