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Simplified HVAC and Mechanical Systems Design, LLC

Keep It Simple and Sincere

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Expert Technicians

Trust us to deliver reliable solutions, exceptional service.

Flexible Scheduling

Trust us to deliver reliable solutions, exceptional service.

Transparent Pricing

Trust us to deliver reliable solutions, exceptional service.

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Welcome

Who We Are and What We Do

With over 25 years of experience, Simplified HVAC and Mechanical Systems Design, LLC specializes in efficient HVAC solutions for residential, commercial, and industrial projects. We focus on custom designs using ACCA Manuals J, S, D, and N, ensuring energy efficiency, comfort, and cost-effectiveness. Serving clients across the U.S. and Canada, we deliver timely, high-quality systems tailored to your building's needs.

About Company
Complete Solutions

Our Clients

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Homeowners

Key Factors to Consider Before Choosing the Most Appropriate HVAC System for Your Home

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Residential Builders

Key Factors to Consider Before Choosing the Right HVAC System for Your Home

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HVAC Contractors

Outsource HVAC Load Calculations and Duct Design to Cut Costs Effectively

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Architects

Energy Conservation assistance, Equipment placement, Provide HVAC Calculations and Permitting documents with support

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Top 6 Reasons

Why Choose Us

Simple, reliable HVAC design with 30+ years of experience—done right, on time, anywhere in the U.S. or Canada.

Expert Technicians

We design smart, straightforward systems that are easy to install, cost-effective, and reliable.

Over 25 Years of Experience

Compliant, precise load analysis for new construction and retrofit projects.

Cost-Effective, Energy-Efficient Solutions

Designs focused on reducing both upfront and long-term operational costs.

Fast Turnaround Time

Standard delivery within 5 business days—rush service available.

Nationwide Service

Serving all 48 U.S. states and most of Canada with remote design support.

Client-Focused Approach

Clear communication, timely updates, and support from start to finish.

HVAC Calculation Services

SIMPLIFIED HVAC and MECHANICAL SYSTEMS DESIGN, LLC

Standard Delivery Schedule

  • No more than five business days after receipt of design drawings and the retainer services fee.
  • An additional fee (30% to 60%) may apply to a requested delivery of three business days or less when business conditions warrant due to abnormally high demand.
  • Additional fee will not apply to a BLOCK LOAD calculation for NEW Construction and < 2,800 square feet floor area.

BLOCK LOAD Calculation

Fee ranges from $0.058 (< 1,600 Sq.Ft.) to $0.070 (< 5,900 Sq. Ft.) per Square Foot Floor Area.

Perfect for NEW Construction projects with less than 2,800 square feet floor area.

ACCA MANUAL J / ROOM-BY-ROOM LOADS

SERVICE CLASS SQUARE FEET $ / Square Foot FLOOR AREA FEE
1 < 1,600 $0.120 1,500 $180
2 < 2,400 $0.130 2,100 $273
3 < 3,400 $0.135 2,700 $364
4 < 5,900 $0.140 3,500 $490

DUCT SIZING - ACCA MANUAL D Calculations

SERVICE CLASS SQUARE FEET $ / Square Foot FLOOR AREA FEE
1 < 1,600 $0.070 1,500 $105
2 < 2,400 $0.080 2,100 $168
3 < 3,400 $0.085 2,700 $230
4 < 5,900 $0.090 3,500 $315

ACCA MANUALS J, S & D CALCULATIONS – Packaged Fees

SERVICE Class SQUARE FEET $ / Square Foot FLOOR AREA FEE
1 < 1,600 $0.23 1,500 $345
2 < 2,400 $0.25 2,100 $525
3 < 3,400 $0.26 2,700 $702
4 < 5,900 $0.28 3,500 $980

Important Notes

Note: Formal drawing with a detailed duct layout is NOT included in these calculation fees. A simplified sketch of the duct layout can be provided with an ACCA Manual D calculation.

Duct layout concepts and responsibility is to be determined at the time of invoicing based on any specific request by clients, mechanical contractor, architectural drawings and the AHU location(s).

Final pricing and schedule to be verified based on review of the architect, owner, contractor or builder submitted project information.

Computer Aided Designs

with ACCA manuals based calculations and duct schematic
  • Manual J _ Heating & Cooling Loads
  • Manual S _ Equipment Selection
  • . Manual D _ Blower performance and duct design & sizing
  • Manual T _ Air Distribution
  • Manual N _ Commercial Load Calculation
  • ASHRAE Standards 62.1 & 62.2 _ Ventilation
  • Building Codes: State & Local
       a.  I-Codes Building Codes – ICC Digital Codes
        b.  CHAPTER RE 4 RESIDENTIAL ENERGY EFFICIENCY – 2024 INTERNATIONAL ENERGY CONSERVATION CODE (IECC)
  • Window Glass Selections: Low-E, Argon Filled, Tinted
  • Window Glass Selections: Low-E, Argon Filled, Tinted
  • Window Glass Selections: Low-E, Argon Filled, Tinted

HVAC Design Process

Getting started is simple—just share your project details and location. We analyze your building's needs, design a custom HVAC solution, and deliver accurate results ready for implementation.

Integration of the ACCA Manuals J, S, D & T Design activities

Our Specialize

Tailored HVAC Solutions for Every Project

At Simplified HVAC and Mechanical Systems Design, we specialize in creating efficient, cost-effective HVAC solutions that meet the unique needs of each project. With over 25 years of experience, we focus on providing customized system designs based on the latest industry standards, including ACCA Manuals J, S, D, and N. Whether it's residential, commercial, or industrial, we ensure that every system is designed for optimal performance, energy efficiency, and comfort, tailored specifically to your building's requirements and location.

850 +
Projects Completed
100 %
Customer Satisfication
Testimonials

Our Happy Customers

Builders and HVAC contractors trust Simplified HVAC for reliable, code-compliant designs that improve efficiency and comfort.

Michael Greene

Simplified HVAC's designs are always accurate and easy to work with. They've helped us reduce installation errors and pass inspections with confidence.

5.0 rating based on 1,234 ratings
Ashley Collins

Working with Simplified HVAC is seamless. Their quick turnaround and precise reports save us time and improve project efficiency across the board.

5.0 rating based on 1,234 ratings
Tom Reynolds

Simplified HVAC has been a game changer. Their reliable designs have helped us avoid costly mistakes and boosted customer satisfaction.

5.0 rating based on 1,234 ratings
Laura Bennett

The team at Simplified HVAC consistently delivers clear, code-compliant designs that help us stay on schedule and avoid costly delays.

5.0 rating based on 1,234 ratings
Kevin Dawson

We've relied on Simplified HVAC for multiple builds. Their attention to detail and fast response times make them an essential part of our process.

5.0 rating based on 1,234 ratings
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