Manual JS

B&B System Design LLC Icon HVAC System Design Services, Manual J, Manual JS, Manual JDS, Manual D, Radiant Design, Rescheck, Material takeoff, Express delivery

For optimal HVAC system performance, accurate Manual JS calculations are crucial. This standard is designed to estimate the heating and cooling needs of residential buildings by considering various factors such as square footage, insulation levels, window types, and local climate conditions. 

Manual S offers a crucial framework for determining the sizing of heating and cooling equipment. This manual focuses specifically on the selection and sizing of residential HVAC systems, ensuring that they operate efficiently and effectively under various conditions.

Pricing

Our transparent pricing structure caters to homeowners and businesses of all sizes, from small to large.

Blockload

$0.07/SQFT

Delivery Time: 3-4 days

24h Delivery Available

Extras

Extra System/ Mini split head: $15
Express Delivery, Rescheck

Report Includes

●Manual J (Load Calculations)
–Blockload load calculations are perfect for jobs where permits require a Manual J but you’re only swapping the equipment. They make your life simple and as we don’t have to design the whole house Room by Room they’re more cost-effective.
●Manual S (Equipment Selection)

☆ ACCA Approved Manual JS
☆ ACCA Approved Software “Wrightsoft”
☆ Accepted in all 50 US states*

*Please confirm with your Local Municipality what their requirements are.

Room by Room

$0.10/SQFT

Delivery Time: 3-4 days

24h Delivery Available

Extras

Extra System/ Mini split head: $15
Express Delivery, Rescheck

Report Includes

●Manual J (Load Calculations)
-Room-by-room calculations are used when you need to know the individual room’s CFM for instances like when you’re adding mini splits or you plan to add Duct design in the future.
●Manual S (Equipment Selection)

☆ ACCA Approved Manual JS
☆ ACCA Approved Software “Wrightsoft”
☆ Accepted in all 50 US states*

*Please confirm with your Local Municipality what their requirements are.

Questions & Answers

Be informed what’s included in the package and the project’s requirements

What’s included in the Manual JS package?

A Residential Blockload or Room by Room Manual J (Load calculations) and Manual S (Equipment selection) design. The manuals are performed using the ACCA-approved software “Wrightsoft” and follow ACCA Manual JS standards.

What’s NOT included in the Manual JS package?

Anything not covered by Manual JS, Duct design, ERV/HRV Design, any documents, state-specific forms (can be filled by the contractor/homeowner), and an engineering stamp which is not required for Residential projects. Licensing, site plan, zoning, and installation requirements are separate from the Manual JS design and are outside the scope of the project.
*Some towns may require additional licensing/certifications that are outside the scope of our work, which is limited to ACCA compliant sizing of your heating/cooling & ductwork and equipment selection. ​

What information is needed to start?

A drawing of the house with the size of ALL walls (just exterior if we’re doing a Blockload), and dimensions (WxH) of all windows, and exterior doors, as well as a filled Price Quote form. The form will contain questions such as equipment preference, construction details, and so on.

Can a Blockload be upgraded to Manual D (Duct design)?

No, a Blockload can’t be upgraded to a Manual D (duct design), as Manual D needs the individual room load requirements. If you plan to add a duct design in the near future, please place an order for a Room by Room Manual JS.

What if you require any state-specific forms such as the Florida R405-2022 supplement?

I do not offer R405-2022. Please reach out before purchasing the gig to discuss any extra required forms as they’re not part of the Manual JDS.

What software do you use?

I use the ACCA-certified “Wrightsoft” program. I find it to be the most accurate and detailed program on the market.

Can this be used to get a permit?

Yes, it can. These calculations are required by most jurisdictions to obtain a Permit to start construction.

Are you familiar with the most up-to-date mechanical codes?

Yes, I am a Master HVAC Contractor License holder for the state of New Jersey and must have code update classes to maintain my license. I have completed well over 5000 load calculations for various states.

Manual JS Information

Learn what Manual JS is and what it’s used for.

Blockload Manual J&S

Block load calculations are perfect for jobs where permits require a Manual J, but you’re only swapping the equipment. They make your life simple, and as we don’t have to design the whole house Room by Room, they’re more cost-effective.

Room by Room Manual J&S

Room by Room calculations are used when you’re adding mini splits, as in this case, we need to know the individual room load and CFM. They can also be used when you plan to add duct design in the future, but you haven’t reached this stage yet. While a Room by Room design can be transitioned to a Manual D (Duct design), a Blockload Manual JS can’t as it’s missing the individual room load.

Overview of Manual J&S

For optimal HVAC system performance, an accurate heat load calculation is crucial, which is facilitated by Manual J. This standard is designed to estimate the heating and cooling needs of residential buildings by considering various factors such as square footage, insulation levels, window types, and local climate conditions.
The methodology outlined in Manual J allows HVAC designers to assess each area’s specific requirements, ensuring that the installed system operates efficiently and effectively throughout the year. By employing this detailed approach, Manual J aids in preventing common issues such as inadequate heating or cooling, which can lead to increased energy costs and uncomfortable living conditions.
Complementing Manual J and Manual S addresses the selection of HVAC equipment to meet the calculated heating and cooling needs. This guideline provides comprehensive criteria for choosing the right size and type of air conditioning and heating systems, ensuring that they align with the specific demands identified in the Manual J calculations. By focusing on system efficiency and performance characteristics, Manual S helps mitigate problems like oversizing, which can lead to inefficiencies and reduced lifespan of the equipment. In essence, the integration of both manuals ensures that HVAC systems are not only appropriately sized but also effectively match the specific needs of the building. Together, these manuals constitute a critical part of the HVAC design process, promoting both comfort and energy efficiency.
Employing the calculations from Manual J and the equipment recommendations from Manual S leads to a well-balanced system that functions optimally. Homeowners benefit from increased comfort levels while also enjoying the cost savings associated with efficient energy use. Overall, the importance of these standards cannot be overstated; they are essential tools that guide HVAC professionals in creating systems that meet the nuanced demands of modern residential living while also adhering to industry best practices.

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