Manual J (Load Calculation) Overview

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Free eBook: 'How to Pass Load Calcs for Permits’
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This is a fast-paced, recorded webinar (12/31/20) where Chris covers the basics of ACCA Manual J and elements of a Site Survey.
1. I’m too busy , What does this mean to me?
2. (4) Details that impact your Heat Loss & Heat Gain the most
3. Sample Manual J Reports
4. Where to find training that will increase your System Design Accuracy & Confidence
Interested in more? Check out our events page for upcoming virtual and in-person training
: www.hvacproblog.com/events

Опубликовано:

5 июл 2024

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Комментарии : 41

@RateItGreen 3 года назад

Good information- thanks for sharing this. The load is constantly changing throughout the day so variable speed is the key.

@hubercats Год назад

Awesome presentation! Thank you.

@caseyjarvis2842 2 года назад

Thank you for this video interested in your guide and and advice on studying for the hvac license exam

@mainormoscoso01 2 года назад

Great information, thanks for the tip on CoolCalc to do calculations.

@AttainableHome 3 месяца назад

This is really excellent, thanks so much for doing this. Learned a ton (no pun intended)

@samersarah957 2 года назад

I’m enjoyed in this informative lecture Chris. I’m graduate from hvacr school so what’s manual you’re advice me to go with it? I want to start in residential work. Thanks.

@ranzerbinz 2 года назад

Great Job Chris! Loved the seminar. This information was incredibly useful. I love using these videos as a supplement in my classroom instruction. Thanks man! Hope you're doing well?

@HVACProBlog 2 года назад

Thanks Derek! Things are great! Glad to hear you are still able to use the content…

@gregburns8099 3 года назад

Semper Fi brother. Just found you. I am a RNC installer looking to move into design and layout. I can appreciate your attention to detail when it comes to correct installation and following code. Would appreciate any help in making my work better, making my installers better and making customers happy.

@HVACProBlog 3 года назад

Semper Fi Greg! If you are ok with reading, I provide a ton of content for free on my website: hvacproblog.com If you want more structured, video training (at a cost), you can find options on my Patreon! What would you say is your #1 need when it comes to learning a detail with System Design?

@flyonbyya 8 месяцев назад

I Hate to sound profoundly ignorant, but I’ve heard from a couple guys that have their Michigan mechanical license say it’s either suggested or some sort of standard procedure to add 20% to the calc. That true, false or it’s more complicated?

@HVACProBlog 8 месяцев назад

A bit more complicated. Most Manual J v8 software has about 20% oversizing already built in due to rounding, etc. Also, if you are installing an A/C or Heat Pump, there is an allowable oversizing as part of Manual S equipment selection. However, you should not simply 'add 20%' as you can see this will continue to significantly oversize the system...

@Zimmerdf 2 года назад

We have an old Farm house completely gutted ready for HVAC. I have been asking HVAC companies if they do load calcs and most don't. The last one I asked if they would do a Manual J and they said yes. I asked how they could do an accurate Manual J before spray foam and Aero-Barrier and he said they use an estimate method. Sounds a whole lot like Manual E to me... Can you complete a Manual J before insulation and air seal?

@itamarnavarrete3057 Год назад

Hi Chris , i got a question about manual j , how apply 1800 sqft into table 7D AE BASE CASE LATENT GAIN if square feet goin in 500 , chart 1000-1500-2000-2500-3000 max

@asfanjagirdar1553 Год назад

Hello Sir, I have confusion while doing the load calculation for the Unfinished and finished basements about when to include them in the calculation. Please answer.

@carlospires6040 9 месяцев назад

👌

@d.baileyspeaks 5 месяцев назад

MWSS 271, Cherry Point!

@HVACProBlog 5 месяцев назад

Nice! I was with MASS-1 when we deployed for the Iraq Invasion in 2003! Semper Fi !

@balfretsoriano4795 2 года назад

Thanks and I want to ask you about where to get these books for me to continue learning all about it if you can send me the information about it thank you again 😊

@HVACProBlog 2 года назад

Hi Balfret! Thanks for commenting and asking - the best place to purchase the ACCA Design Manuals are on their website: www.acca.org/standards/technical-manuals

@CJRoe-ss9bt Год назад

cool calc always seems WWWWAAAAYYYYY off. just did one block and room by room for the same new construction house. got different numbers for each. Just less than 20kbtuh for cooling and 49.5kbtuh for heating block, and a total of 28.8kbtuh for cooling and 39.7kbtuh for heating room by room. If all the info I'm putting in to any software is a guess (new construction), it seems like taking rule of thumb guess would be just as (in)accurate. WTF over. Super frustrating, buy all the programs, use the free ones, do the training and watch the videos. Its all a freaking guess!!!

@deanwilliams1075 Год назад

Would like to have the free resource

@d.baileyspeaks 5 месяцев назад

USMC Veteran!!

@carlospires6040 11 месяцев назад

What the best software load calculation, for you?

@jamesemanuel9527 2 года назад

Well done Chris. Just getting through the final steps of starting an LLC. Had some schooling and mostly commercial service experience (little bit of construction experience). Wanna run this business right and not sq ft / ton method. Thanks for putting this out there.

@HVACProBlog 2 года назад

Thanks for the kind words James! Looking forward to hearing your success in the near future!

@jeromeearly8932 Год назад

My house is 2500 square ft. The size of my air conditioning unit is 3 1/2 ton. The house was built in 1988. I don’t consider 75 to be cool. What size unit do I need to be able to stay at 70 when its 95 outside.

@Balticblue93 Год назад

So so so many variables here to even answer the question. Is that 2500 above grade or total, if you have a basement? How much of your house faces south? What size furnace blower fan in CFM? Was the AC new in 1998? Any chance you could track down the Make and model of the indoor and outdoor units that you currently have? Have you installed any upgraded windows or insulation since you bought it new? What part of the country do you live in? if high humidity, do you have a dehumidifier? Theoretically, 3.5 tons should easily be able to offset and take off 25 degrees of heat off the supply air on a standard system especially if you have enough return air. Do you change your filter and use the correct MERV rated filter for your system often? Conventional thinking states that a 4.5 tons of cooling is needed based on a 500cfm per ton. There are way more questions, but i could get pretty close with a lot of the items listed above. I have seen tight houses that could do it it with 3 tons and super loose homes that would need 5-tons of cooling with a dehumidifier to pull enough heat off. Do you have your equipment cleaned yearly like the AC coil and outdoor condenser unit?

@Anunakipower Год назад

Where to purchase the software? Thanks!

@frankgall6 3 года назад

Where can I find your site survey sheet?

@HVACProBlog 3 года назад

Hi Frank! Great question! The Site Survey Form is available on my Patreon Site as a PDF resource, in lieu of in-person trainings since the pandemic restrictions in New England: www.patreon.com/HVACProBlog?fan_landing=true Chris Morin is the Author, Owner & Founder of the popular HVAC Pro Blog. For Advice with Residential HVAC System Design, Quality Installation, and System Diagnosis, you can find Chris’ Articles on HVACProBlog.com, Exclusive Member Content on Patreon, or popular social media outlets Facebook, LinkedIn, Twitter and RU-vid.

@georgedvojacki9770 3 года назад

How do I get a copy of your PowerPoint presentation.

@HVACProBlog 3 года назад

Hi George! Copies of my presentations are made available to my Patreon Members only at this time. If you are interested in learning more, or using them as a resource, I have Manual J, S, & D Training available as part of the Elite Membership, with downloadable PDF copies...www.patreon.com/HVACProBlog?fan_landing=true

@ggk29 4 месяца назад

New to me

@trent308 3 года назад

Well done! Well presented. Doing master suite/garage addition extreme north California. Im old school extensive engring background started w autocad R12 in high school, hell, backed into a C10 license working in telecom - really having my eyes opened. 14 sheets of design plans I drafted, thought I was going to impress the guys down at the county for my little addition project- hah! Title 24 ... Wha? Manual J? errrr... Sprinklers? INSIDE the house?? Just thnkn where does it end? we will be counting and accounting for and taxed on, sheets used in the bathroom next. Great job here though, I will be aware of and able to do the load calcs based on your vids. But when the code/gov is telling you when you are comfortable, how bright your lights can be, how many gallons you can flush, and what equipment you can put in your own house..? Its a free country? not so much... Shweew, I feel better, lol. Great job, thank you for your service.

@HVACProBlog 3 года назад

Thanks for the kind words Trent! Happy to hear this helped...