Fresh Air

ASHRAE 62.1-2022 T.6-1

System types Single-Zone Multi-Zone 100% Outdoor Air Occupancy Animal exam room (veterinary office) Animal imaging (MRI/CT/PET) Animal operating rooms Animal postoperative recovery room Animal preparation rooms Animal procedure room Animal surgery scrub Large-animal holding room Necropsy Small-animal-cage room (static cages) Small-animal-cage room (ventilated cages) Booking/waiting Cell Dayroom Guard stations Art Classroom Classrooms (ages 5 to 8) Classrooms (age 9 plus) Computer lab Daycare sickroom Daycare (through age 4) Lecture classroom Lecture hall (fixed seats) Libraries Media center Multiuse assembly Music/theater/dance Science laboratories University/college laboratories Wood/metal shop Bars, cocktail lounges Cafeteria/fast-food dining Kitchen (cooking) Restaurant dining rooms Break rooms Coffee stations Conference/meeting Corridors Occupiable storage rooms for liquids or gels Banks or bank lobbies Bank vaults/safe deposit Computer (not printing) Freezer and refrigerated spaces (<50°F) Janitor closets Darkrooms Soiled laundry storage rooms Locker rooms Showers Paint spray booths Storage rooms (chemical) Occupiable storage rooms for liquids or gels Toilets—Private Toilets—Public Breakrooms Main entry lobbies Occupiable storage rooms for dry materials Office space Reception areas Telephone/data entry Auditorium seating area Courtrooms Legislative chambers Libraries Lobbies Museums (children’s) Museums/galleries Places of religious worship Common corridors Sales (except as below) Barbershop Beauty and nail salons Coin-operated laundries Mall common areas Pet shops (animal areas) Supermarket Bowling alley (seating) Disco/dance floors Gambling casinos Game arcades Gym, sports arena (play area) Health club/aerobics room Health club/weight rooms Spectator areas Stages, studios Swimming (pool and deck) Area (m²) Number of people Ez

Exhaust Air Rated

ASHRAE 62.1-2022 T.6-2

Occupancy Animal Imaging (MRI/CT/PET) Animal Operating Rooms Animal Postoperative Recovery Room Animal Preparation Rooms Animal Procedure Rooms Animal Surgery Scrub Large-Animal Holding Room Necropsy Small-Animal Cage Room (Static Cages) Small-Animal Cage Room (Ventilated Cages) Arenas Art Classrooms Auto Repair Rooms Barber Shops Beauty and Nail Salons Cells with Toilet Copy, Printing Rooms Darkrooms Educational Science Laboratories Janitor Closets, Trash Rooms, Recycling Kitchenettes Kitchens—Commercial Locker Rooms (Athletic, Industrial, Health Care) All Other Locker Rooms Shower Rooms Paint Spray Booths Parking Garages Pet Shops (Animal Areas) Soiled Laundry Storage Rooms Storage Rooms, Chemical Toilets—Private Toilets—Public Woodwork Shop/Classrooms Room Area (m²) Number of Fixtures

Results:

Insulation thickness

Insulation Calculator

Duct type: Cooling only Heating only Return
Duct Location: Unconditioned space Conditioned space Outdoors Ceiling cavity below roof Unconditioned attic Vented attic
Conductivity (W/m·K):

Instructions

Select the duct type and installation location, and enter the actual conductivity value from the material catalog (default is the conductivity of Armaflex insulation).

The software selects according to ASHRAE 90.1 table 6.8.2A and 6.8.2B for calculation.

Psychrometric

Psychrometric Calculator

	Q (L/s)	T.DB (°C)	RH (%)
P1
P2

	P1	P2	P3
T.DB (°C)
T.WB (°C)
T.Dew (°C)
RH (%)
H.Ratio (g/kg)
Density (kg/m³)
Enthalpy (kJ/kg)

Instructions

Check the properties of the mixed point:

Enter the full airflow, dry bulb temperature, and relative humidity of two points, then press the Calculate button to get the result.

Check the properties of a single point:

Enter the temperature and relative humidity for one point and press Calculate. Leave the remaining fields blank.

Duct Sizer

Air Flow Air Velocity Pressure Loss Duct Height

Instructions

Air Flow & Air Velocity:

The air velocity in the duct must be carefully considered as it affects the system's vibration and noise. Choose the appropriate velocity depending on the type of duct being calculated (main duct, branch duct).

Pressure Loss (Pa/m):

Pressure loss directly affects the fan's pressure head. The default value is 1 Pa/m, but it can be adjusted according to requirements (typically from 0.8 to 1.2 Pa/m).

Duct Height (mm):

Only enter this when calculating for a rectangular duct. If left empty, the system will calculate for a circular duct. In practice, the height of the duct should be limited to leave room for other systems to pass over or under the duct.

Duct Checker

Common Inputs

Air Flow (L/s): Air Density (kg/m³): Dynamic Viscosity (Pa·s): Duct Roughness (mm):

Round Duct

Diameter:

Rectangular Duct

Duct Width: Duct Height:

Introduction

Common Inputs:

Air Density & Dynamic Viscosity:

These are parameters dependent on the state of the air. Users can adjust them based on the specific conditions of the fluid in the duct. For example, with normal air, the density is 1.204 kg/m³ and the viscosity is 0.0000182 Pa·s, but for smoke or exhaust gases, these values may vary.

Duct Roughness (mm):

The roughness of duct surfaces depends on the material. For example:

• Galvanized metal duct: 0.09 mm
• Stainless steel duct: 0.15 mm
• PVC plastic duct: 0.01 mm

Calculation Formulas:

Reynolds Number (Re):

Re = (ρ × v × D_h) / μ

• Re: Reynolds number
• ρ: Air density (kg/m³)
• v: Air velocity (m/s)
• D_h: Hydraulic diameter (m)
• μ: Dynamic viscosity (Pa·s)

Friction Factor:

Laminar Flow: f = 64 / Re

Turbulent Flow: Colebrook-White equation for turbulent flow:

1 / √f = -2.0 log₁₀[(ε / 3.7D) + (2.51 / Re√f)]

• f: Friction factor
• ε: Duct surface roughness (m)

Pressure Loss:

ΔP = f × (L / D_h) × (ρ × v² / 2)

• ΔP: Pressure loss (Pa/m)
• L: Duct length (m)
• D_h: Hydraulic diameter (m)
• v: Air velocity (m/s)

Noise level calculator

Noise Level Calculator

Freq	EQM (dB)	ATT (dB)
63 Hz
125 Hz
250 Hz
500 Hz
1 kHz
2 kHz
4 kHz
8 kHz

Overall Noise Level: 0.00 dB

User Guide

• Enter the equipment noise levels (fan, cooling tower, pump, etc.) in the EQM column.
• Enter the attenuation of silencer/ATT/Louvre in the ATT column.
• Click the Calculate button to get the final result.

Note:

• The values in the ATT column default to 0 if not entered.