HVAC Basics
"1 Ton AC = How Many kW?"
1 Ton = 3.5 kW = 12,000 BTU/hr
"1 Ton AC = How Many kW?"
1 Ton = 3.5 kW = 12,000 BTU/hr
πΉ CFM in HVAC (Cubic Feet per Minute)
In HVAC design, CFM (Cubic Feet per Minute) is the measure of airflow rate β how much air passes through a space or duct in one minute. It plays a vital role in comfort, cooling, heating, and ventilation.
β¨ Formula:
π CFM = Velocity (FPM) Γ Area (ftΒ²)
πΈ Example:
β’ Room Size = 12 Γ 10 Γ 9 ft β Volume = 1080 ftΒ³
β’ Required ACH = 6
β’ CFM = (ACH Γ Volume) / 60 = 108 CFM
βΈ»
β¨ Quick Conversions:
β’ 1 CFM = 0.472 L/s = 1.699 mΒ³/h
β’ 100 CFM = 47.2 L/s = 169.9 mΒ³/h
β’ 1000 CFM = 472 L/s = 1699 mΒ³/h
βΈ»
π Typical Velocities:
β’ Main Supply Duct β 800β1200 FPM
β’ Branch Duct β 500β900 FPM
β’ Return Duct β 600β1000 FPM
β’ Diffuser Face β 400β600 FPM
In HVAC design, CFM (Cubic Feet per Minute) is the measure of airflow rate β how much air passes through a space or duct in one minute. It plays a vital role in comfort, cooling, heating, and ventilation.
β¨ Formula:
π CFM = Velocity (FPM) Γ Area (ftΒ²)
πΈ Example:
β’ Room Size = 12 Γ 10 Γ 9 ft β Volume = 1080 ftΒ³
β’ Required ACH = 6
β’ CFM = (ACH Γ Volume) / 60 = 108 CFM
βΈ»
β¨ Quick Conversions:
β’ 1 CFM = 0.472 L/s = 1.699 mΒ³/h
β’ 100 CFM = 47.2 L/s = 169.9 mΒ³/h
β’ 1000 CFM = 472 L/s = 1699 mΒ³/h
βΈ»
π Typical Velocities:
β’ Main Supply Duct β 800β1200 FPM
β’ Branch Duct β 500β900 FPM
β’ Return Duct β 600β1000 FPM
β’ Diffuser Face β 400β600 FPM
HVAC Duct Cleaning Process
Here are some HVAC Duct Cleaning Tips that can help maintain efficiency, improve air quality, and extend system life:
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πΉ Before Cleaning
1. Turn Off the System β Always switch off the HVAC before working on ducts.
2. Check Filters First β Sometimes, replacing a clogged filter solves airflow issues without full duct cleaning.
3. Inspect for Mold & Dust β Look for visible dirt, mold, or pest infestations inside ducts.
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πΉ During Cleaning
1. Use Proper Tools β A high-powered vacuum, stiff brush, and microfiber cloths are most effective.
2. Loosen Dirt β Gently brush duct surfaces before vacuuming for better results.
3. Seal Registers β Cover vents not being cleaned to avoid spreading dust.
4. Clean Grilles & Registers β Wash them with soap and water separately.
---
πΉ After Cleaning
1. Replace Air Filters β Use high-quality HEPA filters for better dust control.
2. Sanitize if Needed β Only use EPA-approved disinfectants if mold or bacteria were found.
3. Check Duct Insulation β Replace wet or damaged insulation to prevent mold growth.
4. Seal Air Leaks β Use mastic sealant or metal tape (not duct tape) to improve efficiency.
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πΉ Preventive Tips
Change filters every 1β3 months.
Keep supply and return vents unblocked.
Schedule professional duct cleaning every 3β5 years (or sooner if thereβs heavy dust, pets, or smoking).
Maintain your HVAC unit with regular servicing.
--- #fblifestyle
Here are some HVAC Duct Cleaning Tips that can help maintain efficiency, improve air quality, and extend system life:
---
πΉ Before Cleaning
1. Turn Off the System β Always switch off the HVAC before working on ducts.
2. Check Filters First β Sometimes, replacing a clogged filter solves airflow issues without full duct cleaning.
3. Inspect for Mold & Dust β Look for visible dirt, mold, or pest infestations inside ducts.
---
πΉ During Cleaning
1. Use Proper Tools β A high-powered vacuum, stiff brush, and microfiber cloths are most effective.
2. Loosen Dirt β Gently brush duct surfaces before vacuuming for better results.
3. Seal Registers β Cover vents not being cleaned to avoid spreading dust.
4. Clean Grilles & Registers β Wash them with soap and water separately.
---
πΉ After Cleaning
1. Replace Air Filters β Use high-quality HEPA filters for better dust control.
2. Sanitize if Needed β Only use EPA-approved disinfectants if mold or bacteria were found.
3. Check Duct Insulation β Replace wet or damaged insulation to prevent mold growth.
4. Seal Air Leaks β Use mastic sealant or metal tape (not duct tape) to improve efficiency.
---
πΉ Preventive Tips
Change filters every 1β3 months.
Keep supply and return vents unblocked.
Schedule professional duct cleaning every 3β5 years (or sooner if thereβs heavy dust, pets, or smoking).
Maintain your HVAC unit with regular servicing.
--- #fblifestyle
Essential HVAC Equations Every Professional Should KnowβΌοΈβ
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#hvac #hvacdesign #hvactechnician #hvacmaintenance #fblifestyle
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#hvac #hvacdesign #hvactechnician #hvacmaintenance #fblifestyle