skip to main content
Software
Integrations
Mobile App
Expert Support
All-In-One Platform for Construction and Design
See Pricing
Schedule a Demo
Talk to Sales: (888) 316-4595
My builder uses Houzz Pro to plan the timeline and give detailed estimates and daily updates with photos of progress, and provide invoices at pre-agreed key points in the build. This made the whole experience much more efficient and stress-free.
Steve W.
Client of Cribbs Construction
Learn More
Ideas
Discussions
Houzz TV
Houzz Research
Sign In
Houzz Logo Print
Explore DiscussionsFeatured Home DiscussionsFeatured Garden Discussions
Heating & Air Conditioning
matlab30

HVAC -Manual J load calculation

7 years ago

Hello,

My builder has computed Manual J for HVAC load.I have a couple of questions.


1.In the attachment HVAC-01,if I add upstairs and downstairs cooling load it totals to 49056 btuh but the AH1 only uses 43282 btuh? Why is builder using lower btuh?


2.The cooling CFM upstairs and downstairs adds up to 2028 but builder using 1800.Why builder is using the lower cfm(1800)?

Attachment HVAC_03 has manual D calculations.


Thanks






Comment (1)

Related Stories
ARCHITECTUREHVAC Exposed! 20 Ideas for Daring Ductwork
By Mitchell Parker
Raise the roof with revealed ducts that let it all hang out — and open a world of new design possibilities
Full Story
36
LAUNDRY ROOMS8 Ways to Make the Most of Your Laundry Room
By The Inman Company
These super-practical laundry room additions can help lighten your load
Full Story
199
HEALTHY HOMEGet Cleaner Indoor Air Without Opening a Window
By Mariana Pickering (Emu Building Science)
Mechanical ventilation can actually be better for your home than the natural kind. Find out the whys and hows here
Full Story
70
MOST POPULARMy Houzz: Hip Midcentury Style for a Mom's Backyard Cottage
By Angela Flournoy
This 1-bedroom suite has everything a Texas mother and grandmother needs — including the best wake-up system money can't buy
Full Story
266
MATERIALSInsulation Basics: What to Know About Spray Foam
By Mariana Pickering (Emu Building Science)
Learn what exactly spray foam is, the pros and cons of using it and why you shouldn’t mess around with installation
Full Story
280
INSIDE HOUZZHow Much Does a Remodel Cost, and How Long Does It Take?
By Erin Carlyle
The 2016 Houzz & Home survey asked 120,000 Houzzers about their renovation projects. Here’s what they said
Full Story
191
DECORATING GUIDES7 Tips to Sell Your Home Faster to a Younger Buyer
By Kristie Barnett, The Decorologist
Draw today's home buyers by appealing to their tastes, with these guidelines from an expert decorator
Full Story
335
LAUNDRY ROOMSOne of the Biggest Building-Code Offenders in the Laundry Room
By Dryer Vent Wizard International
A dryer vent specialist shares what to do — and what to avoid — to keep things safe and efficient
Full Story
88
KITCHEN DESIGNA Cook’s 6 Tips for Buying Kitchen Appliances
By Christine Tusher
An avid home chef answers tricky questions about choosing the right oven, stovetop, vent hood and more
Full Story
331
MOST POPULAR8 Little Remodeling Touches That Make a Big Difference
By Samantha Schoech
Make your life easier while making your home nicer, with these design details you'll really appreciate
Full Story
447
Sponsored
More Discussions
Help: Should I opt to repair or replace the damaged attic insulation?
2
Duct Fan/Blower
5
Water leaking from LG HVAC Standard Indoor Unit
8
60s a-frame renovation ideas
4
Controlling electric garage heater with line voltage thermostat
7