HVAC stands for Heating, Air Conditioning, and Ventilation. We have covered the heating and air conditioner parts in the respective ‘Heating’ and ‘Air Conditioning’ sections on LearnMetrics.
However, everybody who wants to understand specifications or just learn how to solve some of the basic HVAC problems will find this general HVAC section useful.
There are a million questions that need answering in HVAC. Nobody can possibly address all of them. Here at LearnMetrics, we try to answer the most common ones to help everybody with a better understanding of HVAC.
One of the basics of general HVAC is simple unit conversion. We deal with BTUs, watts, volts, amps, Ah, Wh, °F, °C, CFM, kW, hp, EER, SEER, CEER ratings, and so forth. In most cases, these are either metric or US standard units; in some cases, we use formulas to convert from a specific rating to another specific rating.
To help you out, we have designed some unit converters and calculators. We’ll start with these but you will find some very useful resources such as mold mediation, ductwork, and so forth that pertain to general HVAC and can be useful both in heating, air conditioning, and ventilation systems.
General Unit Converters
- Watts To Amps Converter (With 120V, 220V Examples)
- Convert Amps To Watts (A to W): Simple Calculator (+ Conversion Chart)
- Watts To Volts Converter (W to V): Calculator + Conversion Chart
- Convert kW To Amps: Kilowatt Ampere Calculator + 3 Examples
- Convert kVA To kW With Power Factor (+ Easy Calculator)
- 3-Phase Power Calculator + Formula (kW To Amps, Amps To kW)
- kVa To Amps Calculator: How To Convert kVa To Amps? (Examples)
- Convert Watts To BTU: Calculator + Conversion Chart (1 W = 3.412 BTU)
- Convert BTU To Watt: Calculator + Conversion Chart (1 BTU = 0.293 W)
- BTU To kW Air Conditioning Calculator (Quick + Easy Converter)
- kW To BTU Calculator: Convert kW To BTU
- kW To Tons Of Refrigeration Calculator + Chart (kilowatt To Ton)
- Ton To kW: Tons Of Refrigeration To kW Calculator + Chart (TR To kW)
- Meter Cube Per Hour To CFM Conversion (m3/hr to cfm)
- SCFM Vs CFM Explained: With SCFM To CFM Calculator (+ Chart)
- Amp Hours To Watt Hours Conversion (Ah To Wh): Calculator + Chart
- How Long Will A 100Ah Battery Last?
- Amp Hour Calculator: How To Calculate Amp Hours Of A Battery?
- Watt Hours To Amp Hours Conversion (Wh To Ah): Calculator + Chart
- How Many Watts In A 12 Volt Battery? (Calculator + Chart)
- Convert Ah To kWh Calculator
- Convert kWh To Ah (Calculator: Input kWh, Get Ah or mAh)
- BTU to Ton (Easy Convert: 12,000 BTU = 1 Ton)
- Convert m3 To kWh (Gas Cubic Meter To kWh Calculator)
- Bar To psi, psig, psia, psid Conversion Calculator (+ Bar To psig Table)
- Convert Pa To PSI: Pascal To PSI Calculator + Conversion Chart
- Convert PSI To Pa: PSI To Pascal Calculator + Conversion Chart
- Convert hPa To PSI: Hectopascal To PSI Calculator + Chart
- Convert kPa To PSI: Kilo Pascals To PSI Calculator + Conversion Chart
- Convert MPa To PSI: Mega Pascal To PSI Calculator + Conversion Chart
- Convert PSI To MPa: PSI To Megapascal Calculator + Chart
- Convert GPa To PSI: Giga Pascals To PSI Calculator + Conversion Chart
- Convert PSIA To PSIG: Calculator + Chart (Incredibly Simple)
- Convert PSIG To PSIA: Calculator + Conversion Chart (Dead Simple)
- Convert Kilowatts To Horsepower (kW to HP Calculator)
- Convert Celsius To Fahrenheit (°C to °F): Calculator, Chart, Equation
- Convert BTU To kWh: Simple BTU To Killowatt-Hour Conversion + Chart
- kWh To BTU Calculator + Chart (Simplest Converter)
HVAC Ratings Converters
- Convert EER To SEER Rating (Calculator + Chart)
- Convert SEER To EER (Calculator + Chart)
- Convert EER To COP And COP To EER (Calculator)
- EER vs SEER: Difference Between SEER And EER Rating
- IEER Explained: Integrated Energy Efficiency Ratio (vs EER, SEER)
- ESEER Explained: European Seasonal Energy Efficiency Ratio
- How To Calculate SEER Rating? Here’s How SEER Is Calculated
General HVAC Calculators
- Power Consumption Calculator And Electrical Bill (+ 2 Examples)
- BTU Calculator: How BTU Is Calculated DIY? (With 8.5% Accuracy)
- Is Natural Gas Cheaper Than Electricity For Heating?
- Specific Heat Capacity Calculator + Formula (Equation C = Q /(m ⨉ ΔT))
General HVAC Specifications Explained
- Understanding COP: Coefficient Of Performance Of Heat Pumps
- HSPF Rating: What Is A Good HSPF Rating For Heat Pumps?
- What Temperature Should I Set My Thermostat In The Winter? (72°F?)
- R410A PT Chart: Pressure Temperature Chart For 410A Refrigerant
- R22 PT Chart: Pressure Temperature Chart For -60°F To +155°F
- R134A PT Chart: Pressure Temperature Chart (-49°F To 150°F)
- R404A PT Chart: Pressure Temperature Chart For -49°F To +150°F
- R407c PT Chart: 407c -49°F To 150°F Pressures (+PDF)
- R448a PT Chart: Pressures At -49°F To 150°F Temperatures (+PDF)
- R290 PT Chart: Pressures At -44°F To 120°F Temperatures (+PDF)
- R454B PT Chart: Pressures At -40°F To 150°F Temperatures
- R422D PT Chart: Pressure For -49°F To 150°F Temperatures (+PDF)
- Air Compressor Oil Type: Refrigerant Oil Chart + R22, R134A, R410A Examples
- What Size Generator Do I Need? (Simple 3-Step Method + Calculator)
- What Size Generator To Run Refrigerator And Freezer? (Crucial: Starting Watts)
- How Much Does It Cost To Run A Generator On Natural Gas? (Calculator)
- 5 Quietest Generators For Home, RV, And Camping (Below 50.7 dB)
- How Long Will A Generator Run On 5 Gallons Of Gas? (Calculator)
- How Many Amps Does A Generator Produce? (500W to 30kW Generators)
- Generator Wire Sizing Calculator + Charts: What Wire Size?
- HVAC Duct Sizing Chart (50-3,050 CFM Duct Charts)
- Duct Velocity Calculator (Air Velocity = Airflow / Duct Cross-Section)
- Rectangular To Round Duct Transformation (Formula + Chart)
- Return Air Grille Sizes: CFM Chart + Grille Size Calculator
- 5 Tell-Tale Symptoms Of Not Enough Return Air From Vents
- How To Increase Airflow To One Room Specifically? (3 Methods)
- 4 Best HVAC UV Lights For AC/Furnaces (No Mold + Keep Efficiency)
- Mold Inspection And Testing: When Do You Really Need $500+ Inspection?
- Wire Gauge Chart For All 44 AWG Wires (+10-200 Amp Wire Sizes)
- Wire Gauge For 20 Amp Circuit: 20A Wire Size + 100 Feet Away
- 30 Amp Wire Size: What AWG Wire You Need? (220/240V, NEC Code)
- 40 Amp Wire Size: 20A Wire Gauge For 220, 240 Volt Circuit (+ NEC Code)
- 50 Amp Wire Size Details: Gauge, Breaker, 220/240V Example
- Wire Size For 60 Amp Breaker: Which AWG Wire To Use? (NEC CODE)
- 100 Amp Wire Size: Which AWG Wire For 100 Amps? (NEC Code)
- Wire Size For 200 Amp Service: What Size For 100, 150 Feet Away? (NEC)
- Thermostat Wiring: How To Wire A Thermostat?
- 12 AWG Wire Amps, 12 Gauge to mm, mm2, 12 vs 14 vs 10
- How Many Outlets On A 20-Amp Circuit?
- 12V Wire Size Calculator + Chart: What Size Wire You Need?
- Thermostat Not Reaching Set Temperature: 7 Causes + Fixes
- Sizing A Circuit Breaker: Breaker Size Calculator + Amp Chart
- Calculate Wire Size: DC Wire Gauge Calculator (+ 1A-500A Chart)
- AWG To mm2 Chart + Calculator (0-40 AWG To mm2)
- AWG To mm Chart (0-40 AWG Gauge Wires To mm)
- kcmil Wire Size Chart (Ampacity Of 250-2000 MCM Wires)
- How Many Watts Can 6 Gauge Wire Handle? How Many Amps 6 AWG?
- AWG To kcmil, kcmil To AWG Calculator (+ MCM AWG Wire Chart)
- kcmil To mm2 Calculator (Formula + Chart For 250-2000 MCM Wires)
- Wire Gauge Wattage Charts For AWG Wires (4/0 AWG To 14 AWG)
- Aluminum Wire Ampacity Chart (For 4/0 To 12 AWG, 250-2000 kcmil)
- What Is Bigger 4/0 AWG Or 250 MCM Wire? (Specs Comparison)
- 15 Amp Outlet On 20 Amp Circuit: Can You Do That?
- How Many Amps Is A Tesla Supercharger? (Calculator + Chart)
- Ground Wire Size Chart: NEC Grounding Conductor Size Chart
- 6 Gauge Wire Vs 8 Gauge Wire: mm, mm2, Amps Comparison
- Electrical Feeder Size Chart: 100-400 Amps (NEC 310.12)
- How Many Outlets On A 15 Amp, 20 Amp, 30 Amp Circuit? (NEC 210.21)
- How Many Watts Can An Outlet Handle? (110V,120V,220V + 15,20,30A Breakers)
- Extension Cord Wattage Chart: How Many Watts, Amps Cords Handle?
- AWG Wire Resistance Calculator With Ohms Law Formula (+ Examples)
- THHN Vs THWN vs THWN-2 Wires: What Is THWN Wire Anyway?
- What Is Insulation R-Value? (+ Insulation R-Value Chart)
- All 9 Types Of Insulation Explained (Materials, R-Values, Applications)
- Insulation R-Value Chart: R-Values Per Inch (For 51 Materials)
- ISO R-Value Chart: Thickness Of Polyiso Insulation (1-20 Inches)
- Rigid Insulation R-Value Per Inch (+ EPS, XPS, ISO Thickness Charts)
- Air Duct Insulation R-Values: ASHRAE Requirements (R-1.9, R-6, R-8, R-12)
- Calculating R-Value: How To Calculate R-Value? (Formula + Units)
- U-Value To R-Value: How To Convert U-Factor To R? (Calculator + Chart)