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> Don't throw your money out the window

 

Calculate the efficiency of your ventilation system using Calc-Leak.

 

Ingenium, an independent research and energy audit agency, developed a unique web tool, at Lindab's request, which can be used to map out the financial effects of substandard airtight sealing of a ventilation system. Calc-Leak was used to calculate the energy losses as a result of these leaks for a standard hospital, a nursing home for the elderly and an office building.

 

 

> Calculation based on “basic input”

 

Choose the tab headed “Input basics” and enter the floor area for the selected building. Select the best air-tightness for the duct network (class C) and compare this with the standard value* (class 2.5A). Calculate both the payback period of the added investment and the annual energy saving.

 

 

> Calculation based on “detailed input”

 

Do you want to know more and simulate a situation? As an HVAC specialist, you can take advantage of the detailed input option. The more information you know about your chosen ventilation system, the more precise your calculation will be.

 

 

> Want to know more about Lindab?

 

Visit us at www.lindab.be!

 

(* source: EN15242)

Input basics  
Floor area (*)  m²
Building type
Improved tightness ductsystem info 
   
(*) Mandatory field
Zero and hyphen = Building default values
  
 

> Calculation based on “basic input”

 

Choose the tab headed “Input basics” and enter the floor area for the selected building. Select the best air-tightness for the duct network (class C) and compare this with the standard value* (class 2.5A). Calculate both the payback period of the added investment and the annual energy saving.

 

"Air-tightness is a true added value to ventilation systems, not least because it comes hand in hand with a low energy bill. The limited additional costs involved in realising an air-tight ventilation system are often not compared with the lower energy bills experienced during use."

 

(* source: EN15242)

 

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Input basics  
Floor area (*) 1 m²
Building type hospital
Improved tightness ductsystem from 2,5A to C
   
Output basics  
Improved tightness Ventilation Class C instead of Class 2,5A
Cost reduction at exploitation 4 €/year eVAT
Extra costs for installation Class C 1 €/year eVAT
Payback time (dynamic) Payback: 1 years
   
 

> Result based on “basic input”

 

Our online calculation tool Calc-Leak provides a clear insight into potential cost savings when using a ventilation system. This is knowledge that helps you to choose the right systems and products.

 

Lindab developed a unique ventilation duct with a double rubber seal.

The result: a perfect seal for your network and an optimum airflow, thanks to the circular shape of the ducts. Moreover, this avoids costly oversizing of ventilators, silencers, ventilator cabinets and electrical installation.

 

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Input basics  
Floor area (*)  m²
Building type
Improved tightness ductsystem info2 
   
Input details
Ventilation airflow  m³/h
Surface of ducts (supply & exhaust)  m²
Part circular ducts (supply & exhaust)  %
Number of circular fire dampers (supply & exhaust)
Number of rectangular fire dampers (supply & exhaust)
Average diameter of circular ducts  mm
Average dimension (Width or height) of rectangular fire dampers  mm
Heat recovery
Cooling
Humidification
Moisture recovery
Power humidification
Power control fans
Total power of installed fans  kW
Unit price electricity  €/MWh eVAT
Unit price fuel  €/MWh eVAT
Average static pressure drop in duct  Pa
Yearly price increase energy  %
   
(*) Mandatory field
Zero and hyphen = Building default values
  
 

> Calculation based on “detailed input”

 

How much energy is lost each year through ventilation leaks? How do I check whether the prescribed standards are actually being achieved? What is the Total Cost of Ownership (TCO) of a ventilation system? No doubt, you must formulate an answer to these questions on a daily basis.

 

Calc-Leak puts you on the right track. As an HVAC specialist, you can take advantage of the detailed input option. The more information you know about your chosen ventilation system, the more precise your calculation will be.

 

Enter the floor area for the selected building. Select the best air-tightness for the duct network (class C) and compare this with the standard value* (class 2.5A). Calculate both the payback period of the added investment and the annual energy saving.

 

Do you want to know more and simulate a situation? Input the detailed information. If you do not yet have all of the information, use the standard value for the building for the parameter in question. You can find the standard values selected by Calc-Leak in the detailed output.

 

This will be shown in the detailed output: "Air-tightness is a true added value to ventilation systems, not least because it comes hand in hand with a low energy bill. The limited additional costs involved in realising an air-tight ventilation system are often not compared with the lower energy bills experienced during use."

 

(* source: EN15242)

 

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Input basics  
Floor area (*) 1 m²
Building type hospital
Improved tightness ductsystem from 2,5A to C
   
Input details  
Ventilation airflow 6 m³/h
Surface of ducts (supply & exhaust) 0 m²
Part circular ducts (supply & exhaust) 25 %

Number of circular fire dampers (supply & exhaust)

0
Number of rectangular fire dampers (supply & exhaust) 0
Average diameter of circular ducts 160 mm
Average dimension (Width or height) of rectangular fire dampers 400 mm
Heat recovery cross flow or equivalent
Cooling cooling present
Humidification humidifier available
Moisture recovery moisture recovery not available
Power humidification fuel
Power control fans no power control
Total power of installed fans 0 kW
Unit price electricity 120 €/MWh eVAT
Unit price fuel 40 €/MWh eVAT
Average static pressure drop in duct 300 Pa
Yearly price increase energy 5 %
   
Output basics  
Improved tightness Ventilation Class C instead of Class 2,5A
Cost reduction at exploitation 4 €/year eVAT
Extra costs for installation Class C 1 €/year eVAT
Payback time (dynamic) Payback: 1 years
   
Output details  
Ventilation airflow 6 m³/h
Surface of ducts (supply & exhaust) 0 m²
Number of circular fire dampers (supply & exhaust) 0
Number of rectangular fire dampers (supply & exhaust) 0
   
Energy consumption without leakage losses  
Energy consumption fans (supply & exhaust) 41 kWh electricity
Power demand cooling and dehumidification (supply) 14 kWh electricity
Power demand humidification (supply) 0 kWh electricity
Total electricity consumption ventilation 55 kWh electricity
Fuel demand humidification (supply) 31 kWh fuel
Fuel demand heating ventilation (supply) 74 kWh fuel
Total fuel consumption ventilation 104 kWh fuel
Total energy cost ventilation without leakage losses 11 €/year eVAT
     
Reduction energy costs    
From Class 2,5A to Class A 3 €/year eVAT 18 %
From Class 2,5A to Class B 4 €/year eVAT 25 %
From Class 2,5A to Class C 4 €/year eVAT 28 %
From Class A to Class B 1 €/year eVAT 9 %
From Class A to Class C 2 €/year eVAT 13 %
From Class B to Class C 0 €/year eVAT 3 %
   
Leakage losses calculation Ducts
(m³/h)
Fire dampers
(m³/h)
Air Flow
(m³/h)
Consumption
(€/y eVAT)
Percent
Class 2,5A 2 0 9 15 141 %
Class A 1 0 7 13 117 %
Class B 0 0 7 11 106 %
Class C 0 0 6 11 102 %
Without leakage losses 0 0 6 11 100 %






 

> Result based on “detailed input”

 

Investing in the leak-tightness of a ventilation system pays off. It is a marginal investment, with an optimum operational efficiency, a lower energy consumption and an extremely quick payback period.

 

Using this web module, you can easily calculate how great the energy losses could be. This is now more important than ever, since the government is applying increasingly stringent energy standards.

 

Lindab has made life even easier for you and, in addition to this accurate online calculation tool, has also developed a test set. The Lindab leak rate meter can be used immediately after completing the installation of a new ventilation system to determine whether the system meets the required specifications. This is a reassurance that every stakeholder will value.

 

Lindab has led the European market in circular ventilation ducts for many years. Our secret?

 

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We offer an extensive range of products, with unique technical properties. Moreover, our intelligent IT-tools can be used to develop exceptionally efficient ventilation systems. The benefits: an extremely friendly energy bill and an optimised environmental impact.

 

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