Complete Heat Load Calculation in Revit

Complete Heat Load Calculation in Revit | Full Tutorial

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TLDR: The tutorial demonstrates how to effectively use Revit for HVAC design by creating a space schedule, setting up conditioned and unconditioned spaces, and performing accurate heat load calculations to ensure efficient indoor comfort. 1. 00:00 🔧 Create a space schedule in Revit for heat load calculations by adding key parameters and using formulas for fresh and return air. 1.1 Create a space schedule in Revit as the first step for heat load calculation. 1.2 To create a space schedule for heat load calculation in Revit, access the analyze tab, select spaces, and add parameters such as level, room name, area, and space type. 1.3 To create a comprehensive heat load calculation schedule in Revit, include calculated cooling load, supply air flow, condition type, number of people, outdoor air per area, outdoor air per person, and calculate fresh air CFM using the appropriate formula. 1.4 To calculate fresh air in Revit, add a calculated parameter using the formula for outdoor air per person multiplied by the number of people, plus outdoor air per area multiplied by the area of the space. 1.5 To calculate return air in Revit, use the formula: return air = calculated air flow - fresh air, and add it as a calculated parameter in the schedule. 2. 06:03 🌡 Format Revit views for heat load calculations by sorting levels, adjusting unit settings, and specifying room conditions for accurate cooling load totals. 2.1 To format the view in Revit, sort by level, add a footer with totals, hide the repeating ground level, and ensure the level is not displayed in the body. 2.2 To view total areas and calculated cooling loads for each floor in Revit, use the formatting options to select and calculate totals, and adjust units as needed. 2.3 To change the cooling load unit in Revit's space schedule, access the unit settings, select HVAC, and choose the desired unit, while ensuring the correct space type is assigned for accurate heat load calculations. 2.4 Select the appropriate condition type in Revit for each room to specify whether to supply cooled air, heated air, both, or no conditioned air. 3. 10:55 🏢 Set up conditioned and unconditioned spaces in Revit, create a space schedule for fresh air requirements, and customize space tags to display essential information like cooling load and airflow. 3.1 Set up conditioned and unconditioned spaces in Revit for various rooms, specifying ventilation where needed. 3.2 During heat load calculations in Revit, it's essential to specify conditioned and unconditioned spaces accurately, particularly for principal rooms and corridors. 3.3 To perform heat load calculations in Revit, first create a space schedule to determine fresh air requirements and then adjust the space tag accordingly. 3.4 To modify a space tag in Revit to display additional information like supply airflow and cooling capacity, select the tag, go to the modify tab, and edit the family to include the desired space labels. 3.5 To customize tagging in Revit, select desired parameters like calculated cooling load and supply airflow, then apply changes to display them in the tag format. 3.6 To display the space name, calculated cooling load, and supply air flow in a vertical arrangement in Revit, edit the label settings to include prefixes and suffixes as needed. 4. 18:17 🏗 Save and load the updated Space Tag in Revit for accurate heat load calculations, create HVAC zones for multiple floors using a single AHU, and ensure proper identification of HVAC zones. 4.1 Save the Space Tag for Revit heat load calculation to your desired location and load it into the project to view the changes. 4.2 To display the supplier CFM and cooling load values in Revit, replace the existing Space Tag with the updated one from your saved files. 4.3 Select and update existing tags in Revit for rooms requiring air conditioning, ensuring accurate heat load calculations and proper identification of HVAC zones. 4.4 To supply conditioned air to multiple floors using a single air handling unit (AHU) placed on the roof, create an HVAC zone in Revit and define it accordingly. 4.5 Select the desired spaces in Revit to supply conditioning, then finish editing to confirm the selection. 4.6 Create HVAC zones in Revit for multiple floors using the same air handling unit (AHU) while managing duplicate name warnings. 5. 25:39 🌡 Accurate heat load calculations in Revit are crucial for HVAC system design, starting with building type and location selection to ensure efficient indoor comfort. 5.1 Accurate heat load calculations in Revit are essential for determining HVAC system requirements, optimizing sizes, and ensuring efficient indoor comfort. 5.2 To determine duct sizing, start the heat load calculation by accessing the heating and cooling load options in the analyze step of Revit. 5.3 To perform a heat load calculation in Revit, select the building type (e.g., school), specify the location (e.g., Hyderabad, India), and use the internet mapping service to define the location for accurate design conditions. 5.4 To resolve the project address error, ensure you are connected to the internet and use the search button to locate your city. 5.5 The ground plane is the horizontal surface for construction, requiring selection of the ground floor and project phase, while considering the service gap for HVAC and plumbing systems in the building envelope. 6. 31:15 🌡 The tutorial covers HVAC design using Revit, focusing on VAV systems, setting unconditioned spaces, calculating cooling loads, and exporting heat load reports. 6.1 The tutorial explains the selection and differences between single duct and dual duct Variable Air Volume (VAV) systems for air distribution in HVAC design. 6.2 Select the building infiltration class as medium and designate unconditioned spaces like corridors and washrooms in the default settings in Revit. 6.3 To calculate the cooling load in Revit for an unconditioned space in Hyderabad, input the cooling set point of 107°F, adjust the indoor air temperature to 102°F, select all HVAC zones, and set the cooling air temperature to 56°F to achieve a comfortable room temperature of 76°F. 6.4 The tutorial explains how to perform heat load calculations in Revit, including generating and saving load reports for various spaces. 6.5 To transfer a heat load calculation report from Revit to HVAC software, open the 3D view, select the export option, choose gbXML, check the use room and space volume, and save the report to your desired location. 6.6 Save the file as XML, then open Revit software to create or access a project. 7. 41:33 🌡 Import the gbxml file, set measurement units, and manually input location details in Revit for accurate heat load calculations, while noting potential inaccuracies in heat transfer through partition walls. 7.1 Select the latest ventilation option, set the measurement units, and import the gbxml file into the software for heat load calculation. 7.2 To view and edit the details of a selected space in Revit, such as the account department, access the space properties to see information like floor area and ceiling height. 7.3 Revit's heat load calculation may not accurately account for heat transfer through partition walls between conditioned and unconditioned spaces. 7.4 To perform a heat load calculation in Revit, manually input the location details, such as latitude and longitude, for cities not listed, like Hyderabad. 7.5 To determine air properties for heat load calculations in Revit, refer to the ASHRAE handbook for specific data such as latitude, longitude, elevation, and temperature ranges for your location, like Hyderabad. 8. 48:04 🔥 Perform heat load calculations in Revit by inputting space dimensions, U values, and partition details to generate accurate cooling load reports. 8.1 To perform a heat load calculation in Revit for an account department, select the appropriate space, input the floor area and U value, and measure any partition walls between conditioned and unconditioned spaces. 8.2 To calculate heat load in Revit, measure dimensions, adjust units, input wall partition area and U values, and account for temperature differences to finalize the cooling load. 8.3 To transfer a heat load report to Revit, create a space schedule by selecting the appropriate parameters such as level, space name, area, design cooling load, and supply airflow rate, then adjust formatting and settings as needed. 8.4 Create a space schedule and modify the space tag in Revit to display the design cooling load and specified supply air flow for accurate heat load calculations. 8.5 The tutorial demonstrates how to perform a heat load calculation in Revit for a VAV system in a single space, including selecting components, inputting data, and generating results. 8.6 Adding partition wall details in Revit increases the cooling load to 1.3 TR and supply airflow to 769 CFM, highlighting the importance of including all details for accurate heat load calculations.