Equipment

Hover over the Equipment to preview connection points. This ensures you connect to the correct input or output.

Use the Pipe drawing tool to create connections between the Equipment and the System.

• Inlet Connection: Typically indicated as the input side of the equipment by the arrow in the Equipment.

• Outlet Connection: Typically indicated as the output side of the equipment by the arrow in the Equipment.

Flow Connection: Connect the flow pipe to the top inlet of the equipment.

Return Connection: Connect the return pipe to the bottom outlet.

• The return typically has a Balancing Valve or Recirculation Pump by default.

Ensure pipes or ducts are properly connected.

• Connected: Pipes appear solid.

• Unconnected: Pipes remain semi-transparent with red circles at their endpoints.

Name: Serves as an identifier for the equipment within the design workspace.

• Click on the equipment, and update the name in the properties panel. Use descriptive names to quickly identify equipment in reports and schedules.

Rotation: Allows you to rotate the equipment to align with the system layout.

• Select the equipment, and use the rotation arrows in the properties panel. 

Right to Left: Flips the inlets and outlets of the equipment to reverse their orientation.

Shape: Determines physical representation (Rectangular or Circular)

Width and Depth: Defines the equipment's physical dimensions for visualization.

• Review and edit the width and depth in the respective fields to customize its appearance in the design.

Configuration: Operational setup options:

• Duty: Single unit for 100% demand

• Duty Assist: Primary unit with assist component

• Duty Assist Assist: Primary with two assist components

• Duty Assist Standby: Includes standby unit for backup

• Duty Standby: Complete backup unit available

Manufacturer: Specifies the manufacturer of the equipment and is included in report exports.

Model: Identifies the model of the equipment and is included in report exports.

MCS Certificate Number: Records the MCS (Microgeneration Certification Scheme) certificate number and is included in heat load reports.

Is there a cold water inlet?: Select Yes to show the connection or No to remove it from the design.

Inlet Flow System: Choose the system type, such as Water, to specify what the inlet connects to.

Inlet Height Above Floor: Specify the height (from the floor) where the inlet pipe connects to the equipment.

Is there a gas inlet?: Select Yes to show the connection or No to remove it from the design.

Gas Inlet Flow System: Choose the system type, such as Gas, to specify the connection type.

Gas Consumption: Enter the gas demand value in appropriate units to reflect system requirements.

Diversity: Specify a percentage to reduce gas consumption in common pipes. This accounts for situations where not all fixtures or appliances operate simultaneously.

Gas Pressure: Enter or review the gas pressure. The default value may have been determined by an upstream gas pressure regulator but can be manually adjusted.

Add Pre-Heat: Enable this option to include a pre-heating system.

Pre-Heat Flow System: Choose the system type, such as Heating, for the pre-heat connection.

Rating Method:

• Power: Enter the power rating (kW). This will be included in flow rate calculations based on the system's delta T.

• Flow Rate: Specify the flow rate directly. This will be added to the flow rate calculations without considering the system's delta T.

Volume: Enter the water volume that is part of the pre-heat system (e.g., volume in the heating coil). This value contributes to the total system volume but does not include the entire equipment volume

Remove/Add Pre Heat: Choose to add another pre-heat inlet system to the equipment, which will have it’s own individual inlet properties

Outlet Flow System: Specify the type of flow system connected to the outlet, such as Hot Water, Chilled Water, or other fluid types. This determines how the system will be calculated and what other properties are available.

Outlet Height Above Floor: Define the height of the outlet pipe connection above the floor level. This is used for both visualization in the design workspace and for pressure calculations in the system.

Outlet Temperature: Enter the flow temperature of the water or fluid exiting the equipment. This is crucial for calculating temperature differentials and heat transfer in the system.

Is there a recirculation system?: Choose Yes to add a recirculation pump for system connection, or No to exclude it. This affects the overall system design and calculations, particularly for maintaining temperature in longer pipe runs.

Is the recirculation pump on the return?: Select whether the recirculation pump is located on the flow or return side of the system. This choice impacts system pressure calculations and pump performance requirements.

Include Pipe Heat Load?: Enable this option to include the heat load of the pipes in the flow rate and pipe sizing calculations. This is particularly important for maintaining accurate temperature control in longer pipe runs.

Minimum Return Temperature: Define the minimum return temperature to the equipment. The delta T (temperature difference) is calculated as the difference between this value and the outlet flow temperature, which is crucial for system performance calculations.

Maximum Return Velocity: Review and edit the maximum return velocity on the system. This helps prevent excessive noise and erosion in the piping system while ensuring proper flow characteristics.

Internal Pressure Drop: Add the internal pressure drop of the outlet to account for the equipment's effect on system calculations. This ensures accurate pressure loss calculations throughout the system.

Add Return to PSD Flow Rate: For domestic water systems, choose whether the recirculation flow is combined with the peak flow or is sized only to the largest flow. This affects how the system's total flow rate is calculated.

Maximum Recirculation Pump Flow: Specifies the maximum allowable flow rate for the recirculation pump. A warning is triggered if this threshold is exceeded, helping prevent system overload.

Maximum Recirculation Pump Pressure: Sets the maximum allowable pressure for the recirculation pump. A warning is triggered if this is exceeded, helping protect system components from excessive pressure.

Add New Outlet: Create an additional outlet system from the equipment. This allows for multiple outlet connections to be defined from a single piece of equipment, each with its own individual outlet properties and settings.

SCOP (Seasonal Coefficient of Performance): A measure of the system's efficiency throughout the year, calculating the ratio of heat output to energy input across different seasons. This value is used to determine the overall energy efficiency of the system and is crucial for energy consumption calculations.

SCOP Rating Table: A comprehensive table of performance values across different outlet temperatures. This allows for more accurate efficiency calculations as the system's performance varies with temperature conditions. The values in this table are used to automatically determine the appropriate SCOP based on the outlet temperature setting.

Daily Domestic Hot Water Load: The amount of hot water this system will supply each day, measured in liters or gallons. This value is essential for calculating the system's energy usage and appears in the Heat Loss Report export. Higher daily loads result in increased energy consumption.

Hot Water Immersion Use: Specifies how often the immersion heater is used (options: once per day, once per week, or never). More frequent usage results in higher energy consumption, directly impacting the system's overall energy efficiency. This setting is crucial for accurate energy usage predictions.

Size of Hot Water Cylinder: The storage capacity of the hot water cylinder. Larger sizes result in greater energy use due to increased standing losses, but provide more hot water availability. This value affects both energy calculations and system performance characteristics.

SPF (Seasonal Performance Factor): Similar to SCOP but specifically used in system energy usage calculations for heat pumps. This factor takes into account the seasonal variations in performance and helps determine annual energy consumption expectations.

Legionella Purge Temperature: The temperature required for the heat sanitization process to prevent Legionella bacteria growth. Higher temperatures increase energy consumption but are necessary for safety. Typical values range from 60-65°C (140-149°F) depending on local regulations.

Legionella Purge Frequency: Defines how often the system performs the purge cycle (options: daily, weekly, or monthly). More frequent purges increase energy usage but provide better protection against bacterial growth. The frequency often depends on local health and safety requirements.

Sound Power Level: The noise level produced by the equipment, measured in decibels (dB). This value is typically obtained from the manufacturer's data sheet and is crucial for assessing the acoustic impact of the installation. It serves as the base value for all subsequent noise calculations.

Number of Reflecting Surfaces (Directivity): Indicates how many surfaces are nearby the equipment (options: 1, 2, or 3). Each reflecting surface can increase noise levels by redirecting sound waves. This factor is essential for calculating the actual noise level at the assessment point:

• 1 surface: Typical for equipment mounted on a wall

• 2 surfaces: Common for corner installations

• 3 surfaces: Used for equipment in alcoves or similar confined spaces

Distance to Assessment Point: Specifies the distance from the equipment to where the noise level needs to be assessed, typically measured in meters or feet. This is crucial because sound levels decrease with distance according to the inverse square law. The measurement point is often at a property boundary or near neighboring buildings.

Block Level: Defines the level of obstruction between the equipment and the assessment point, with options for:

• Complete: Full barrier blocking direct sound path

• Partly: Partial obstruction of sound path

• Not Blocked: Clear line of sight to assessment point

Capacity: Indicates the tank size, either calculated based on peak storage minutes or manually overridden.

Peak Flow Rate Storage: Specifies the duration (in minutes) of peak flow rate you want the system to store.

Minimum System Volume: Sets the minimum acceptable system volume. A warning is triggered if the system volume falls below this threshold.

Volume: Enter the water volume that is part of the equipment. This value contributes to the total system volume.

Static Pressure: Defines the static pressure available if the equipment includes a tank. Typically calculated as 10 kPa per 1m of water height. This is the starting pressure in your system from this point onwards.

Spare Pressure: Adds extra pressure on top of the pump pressure to account for potential real-life scenarios, such as additional bends or unexpected losses.

Pump Pressure: Specifies the pressure the pump adds to the system to achieve the minimum required pressure at each outlet.

Pressure Loss: Input the equipment's pressure loss value for accurate pressure calculations.

Internal Pressure Drop: Add the internal pressure drop of the outlet to account for the equipment's effect on system calculations.

Pressure Type: Provides the option to either add a pressure drop or add pressure:

• Pump Duty: Lets you add pressure to the system in this location

• Dynamic Pressure Loss: Lets you add pressure drop to the system

AHU (Indoor): Supply connection only.

AHU (Outdoor): Intake and supply connections.

AHU (MVHR): Intake, exhaust, supply, and extract connections.

AHU (Indoor) w/ H/C: Supply connection and heating/chilled (H/C) connections.

AHU (Outdoor) w/ H/C: Intake, supply, and heating/chilled (H/C) connections.

AHU (MVHR) w/ H/C: Intake, exhaust, supply, extract, and heating/chilled (H/C) connections.

Heat Recovery Efficiency: Define the percentage of heat recovered by the MVHR system. This value reduces the heating load in the system calculations.

Supplied Air Temperature: The supplied air temperature is used for calculations when increasing the flow rate based on the heating load.

Associated Rooms: Auto-fill the heating load based on associated room heat load calculations performed in h2x.

Intake/Supply Internal Pressure Drop: Enter the internal pressure drop for intake or supply systems. This value affects system fan calculations.

Exhaust/Extract Internal Pressure Drop: Input the internal pressure drop for exhaust or extract systems. This value affects system fan calculations.

Is there an intake outlet?: Select whether an intake outlet is included in the system.

Is there an extract inlet?: Specify whether an extract inlet is present in the system.

Is there an exhaust outlet?: Specify whether an exhaust inlet is present in the system.