Heating Impact Analysis Tool

Professional analysis of HIU retrofit performance against UK building standards (CIBSE CP1, BS EN 12831-1, BS 6700)

System Configuration

Design Flow/Return (°C)

Original system design temperatures

Target Flow/Return (°C)

Proposed HIU operating temperatures

Room Setpoint (°C)

Design Outdoor Temperature (°C) Worst-case winter design temperature

Total Heat Load at Design (kW) Building heat loss at design conditions

Available Pump Head (m) HIU pump capability

Advanced Settings

Pipe Size & Material

Run Length per Branch (m)

Equivalent Length Multiplier Accounts for fittings and manifolds

Branches in Service Radiators operating concurrently

Radiator Exponent (n) Heat output ∝ ΔTⁿ (1.3 for panel radiators)

Building Thermal Mass (kJ/K) Affects warm-up times

Performance Analysis

Radiator Output

--%

At target temperatures vs design

Required Flow Rate

--L/s

Total system flow requirement

Pump Head Status

--m

Required vs Available

Maximum Achievable

--°C

At design outdoor temperature

Struggle Point

--°C

OAT where system begins to fail

Warm-up Time

From 16°C to setpoint

Detailed Performance Metrics

Design Heat Loss

-- kW

Available Heating Capacity

-- kW

Capacity Ratio

Heat Deficit at Design

-- kW

Visual Analysis

Standards Compliance

Key Standards References

CIBSE/ADE CP1:2020

Heat Networks Code of Practice - Primary design standard

BS EN 12831-1:2017

Heat load calculation methodology

BS 6700:2006

Hydraulic design requirements

Building Regulations Part L1A

Conservation of fuel and power