Ventilation System Design

Retouchreform is your one-stop HVAC service provider for all your design, installation and repair needs. Whether you’re looking for help with something minor or need an experienced professional to take on a larger scale project — We are your go-to pro and we are ready to handle it all. Browse through the list of my services below, and get in touch for your free estimate.

"We are experienced in HVAC system design and well aware of ASHRAE/ISHRAE standards. Our team can understand your need and can develop HVAC model in Autodesk Revit easily using the calculated design data. Hope to help you with your next project."

Experience design at scale

Since 2014, Retouchreform has been recognized as a top HVAC Designer and Contractor in India. We’ve provided clients with a wide range of contracting services for all their remodeling and repairing needs. Whether you’re looking to renovate your existing space or add a whole new extension, We are happy to help you achieve the results you seek. Contact us today to receive a free estimate.


Do you have a construction or remodeling idea that you’d love to bring to life? Since 2014, We’ve provided our clients with a wide range of contracting services, including Industrial HVAC Installation, at competitive market rates. If you’re looking for a certified expert for your next project, We are the person to call. Get in touch today for your free estimate.


Our clients are our number one priority, and we’ll go the extra mile to make sure they’re completely satisfied with our work. Have a specific project that requires professional attention? Our Air Purifier Installation services are designed to tackle even the most complex projects. Call us today to discover how we can help.


Looking for a reliable HVAC Contractor with years of experience? Since 2014, We’ve earned a reputation for absolute customer satisfaction with our contracting services. We offer Filter Maintenance and Replacement and many other services at competitive rates, all while providing clients with personalized attention that’s catered to their needs. Get in touch so we can get started right away.

Step - 1
HVAC System Design
Building Survey

Feasibility studies are preceding studies initiated in the very early stage of a project to collect the required input details from the client to do our load calculations.

Step - 2
HVAC System Design
Selection of Systems (Classification of Machines)

Based on the building survey report we will offer/think about the HVAC system which may deploy to the site, all are conceptual. You will have options to choose the right system. We will give a budgetary proposal and prepare detail design related documents. 

Step - 3
HVAC System Design
Load Calculation (Cooling and Heating loads)

Performing heating and cooling load calculations for all conditioned building spaces to determine the zones and capacity of the new heating, ventilation, and air conditioning.

Factors of Calculations: conduction and convection heat transmission, air ventilation and infiltration, solar heat gain, maximum anticipated staff and public occupancy, existing and future equipment, machines, appliances, and other internal building heat sources.

Identify and locate all of the equipment, machines, appliances, and other similar internal building heat sources on the floor plans of the building. Include their BTU ratings so they can be used for the heating and cooling load calculations and future air conditioning system balancing.

Step - 4
HVAC System Design
Machine Selection

Factors affecting machine selection:-

Site condition

Economic condition

Client requirement

Interior requirement

Space availability

Noice level

Outside wall availability for Window A/C

Availability of water for a water-cooled chiller

As a design consultant, we will select the best cost-effective system for the client:-

Window A/C Selection

Split A/C Selection

Ductable Split A/C Selection

Package A/C Selection

VRF A/C Selection

Chiller A/C Selection

AHU Selection

Step - 5
HVAC System Design
Duct Desiging

Duct systems are designed to properly distribute air throughout a building. Ducts that are not well designed result in discomfort, high energy costs, bad air quality, and increased noise levels.

Step - 6
HVAC System Design
Fan Selection

A fan is the prime mover of an air system or ventilation system. It moves the air and provides continuous airflow so that the conditioned air, space air exhaust air or outdoor air can be transported from one place to another through air ducts or passages.

Step - 7
HVAC System Design
Chill Water Pipe Designing

Piping which join the pump, the chilled and FCU or AHU in which chill water is supplied is called secondary or chill water piping.

Methods for chilled water pipe design - Constant velocity method and Veclocity + Friction method.

Step - 8
HVAC System Design
Fittings Selection

In the Hydronic system, the chilled water pipes are usually joined with either screwed or welded flanges, fittings or compression joints.

Types of fittings - Pipes fittings and Machine fittings (Chiller, Pump, AHU or FCU etc).

Step - 9
HVAC System Design
Selection of type and size of equipment

Selection of type and size of equipment is crucial as far as the smooth and cost-effective system. We will ensure it during the design of a system.

Step - 10
HVAC System Design
Planning the location of each piece of equipment in the building

Planning the location of each piece of equipment in the building is important in during design to get most out of the system. Our team will always emphasise on the matter to ensure efficiency.

Step - 11
HVAC System Design
Drafting and documentation of HVAC system

Duct layout/Plant layout - We will provide you the complete design layout with all used components like plenums, ductwork, blowers, registers, grills, diffusers, dampers, volume adjustment devices, controls, etc. Outside air ventilation and air change quantities for the building.

Preparation of Bill of Quantities (BOQ) - List of item in project and its quantity as per the final design drawings.

Preparation of material specification - Detail of a material / equipment by the design, construction and performance of all listed item in BOQ.

Preparation of tender document - Tender Drawings, Tender Bill of quantity and Tender specification (will contain scope of work, approved makes and material specification).

Step - 12
HVAC System Design
Approval of all data sheets and technical submittal

Verification of contractor construction document (like equipment technical data sheet, GA drawings, equipment performance curve) and construction drawings and approving the same.

Step - 13
HVAC System Design
Construction and Commissioning Management

Verification of project schedule, inspection of supplied equipment’s, inspection of work quality and final verification of equipment commissioning report and approving the same.

fall in love with our features

HVAC System Design

Heating or Cooling Load Calculation following Carrier E-20, ASHRAE/ISHRAE and software.

HVAC System Installation

Our team of experts can provide a number of installations to fit your needs.

RFIx - Doorstep Repair Service

We also provide doorstep ventilation system repair service. Kindly install our RFix App from the Google Play and book the service you need.

HVAC Model Drafting

2D HVAC Layout drawing in AutoCAD and 3D HVAC model using Autodesk Revit.

HVAC System Maintenance

We provide routine check-up of HVAC system to ensure nonstop service.

Free Consultation

Do you want to discuss any project with us? Feel free to contact.