I explain and teach HVAC, solve air conditioning problems and help you make air conditioner
buying decisions.
Also provide design and consultation services.
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(Founder & Engineer)
2026’s Best Mini Splits: Top 6 Picks for Every Home
Mini splits redefine home comfort with ductless cooling and heating, perfect for any space. As 2026 brings cutting-edge models, choosing the right one is key. I’ve explored top systems that…
Featured Posts
Chilled Water System: The Ultimate Guide (Types & Diagrams)
How to Size Condenser Water Pipes
Mini Split Brands: Who are They and Which are the Best?
Return Duct Size for HVAC Unit (Sizing Chart & How-to Guide)
Mini Split Placement: Best Location for Mini Splits (w/ Photos)
Mini Split Sizing Guide: How-to, Chart & Example
6 Best Mini Splits for Heating (2026): Cold Climate Picks
Mini split heat pumps provide efficient heating for homes without ductwork. With advancements in inverter…
How to Charge a Mini Split? (Methods & Procedures)
Mini splits don’t work properly when they’re low on refrigerant. If your mini split is…
How to Calculate Static Pressure in a Duct?
A fan must have enough external static pressure to deliver the required airflow in a…
COP | SEER | EER | CEER | kW/Ton | HVAC Efficiency Guide
The energy efficiency of air conditioners and chillers is commonly represented in either COP, SEER…
Best-Selling Online Courses
Intermediate Level
Chilled Water System Design Course
A TRUE design course that takes you through the process of designing a chilled water system for a modern high-rise building.
Entry Level
HVAC Beginner Course
Turn yourself into an HVAC competent in 10 days with the fundamentals of air conditioning, system working principles and basic design skills
Design-Focused
Psychrometric Analysis Course
Learn how to size AHU cooling coils and troubleshoot air conditioning problems by analyzing the psychrometrics.
How PICV Works? (In-Depth Explanation w/ Diagram)
PICVs are used in modern chilled water systems. They are fitted in AHUs and FCUs…
How Chiller Work: 7 Essential Facts of Chiller Working Principle
How chiller work is a common question in HVAC, especially when this is your first time…
6 Types of Valves Used in HVAC (with Details)
Valves are widely used in HVAC. Different valves have different functions. Valves used in HVAC…
5 Types of Pumps in HVAC (Common Terms Explained)
Pumps are widely used in HVAC. By default, pumps are machines that move water. However,…
Duct Elbows Explained: Types, Radius, Pressure Loss & Efficiency Tips
Duct elbows are essential components in HVAC ductwork, allowing air to change direction while maintaining…
Duct Velocity Pressure, Standards and Calculations
When designing a duct system, the velocity of the air traveling inside the duct is…
Duct Velocity Pressure, Standards and Calculations
When designing a duct system, the velocity of the air traveling inside the duct is…
HVAC Diffuser Sizing Guide: CFM Chart & Selection
Supply air diffusers are critical to HVAC air distribution system. Inappropriate supply air diffusers can…
Video Guides
6 Best Window ACs for Large Rooms (2026): For 500-700+ Sq Ft
Struggling with hot stuffy air in a spacious living room open-concept apartment or big master…
6 Quietest Window ACs (2026): Sleep-Friendly Picks
If you’re searching for the quietest window ACs in 2026, these top models deliver powerful…
5 Smartest Mini Splits for 2026: Top Features Unveiled
Smart technology transforms home climate control. Mini splits with advanced features bring efficiency and precision…
How to Charge a Mini Split? (Methods & Procedures)
Mini splits don’t work properly when they’re low on refrigerant. If your mini split is…
Mini Split Cover Ideas: 9 Ways to Hide Your Mini Split
Some people are not satisfied with the appearance of mini splits. They want to cover…
Mini Split vs Central Air: 7 Key Metrics Compared
Central air systems are the traditional HVAC systems found in many homes. Nowadays, mini splits…
Mini Split vs Heat Pump: What’s the Difference?
Mini split and heat pump are two common terms used in residential HVAC systems. They…
Fujitsu Mini Split Remote Symbols Explained
Fujitsu is one of the most popular mini split brands. One of the reasons is…
Do Heat Pumps Have Heat Exchangers (Air Exchangers)?
In cold climates, houses often use a heat exchanger for ventilation. Homeowners who are currently using a furnace for heating may wonder if they still need a heat exchanger if…
Commercial Kitchen Ventilation (CKV) Exhaust Calculation
Commercial kitchen ventilation (CKV) is a standalone ventilation system. It is different from other ventilation…
Bathroom Fan Sizing Guide: Code, CFM Chart & Calculation
Ventilation is essential in the bathroom. An adequately sized bathroom fan is critical to the…
Pressurization Fan Duct Connection Basics
Pressurization fans are connected to ducts and a few other components. Each component has its…
High-Rise Buildings Fire Safety Measures
More and more people are living or working in high-rise buildings and they are concerned…
HVAC CHEAT SHEET
Sign up free to download this cheat sheet or join the Free Plan to access more free downloads and become a member of our community!
8 Types of HVAC Jobs: Find Your Perfect Job
HVAC is a large industry and there are many HVAC jobs needed for different tasks….
HVAC Costing Guide: How to Evaluate HVAC Installation Cost
Whether you’re a design engineer (consultant), project manager or business owner, costing is a big…
Project Engineer vs Project Manager: Salary, Stress & Skills
Project engineers and project managers seem to do the same thing. Hence, many people are…
HVAC Excel Calculators (User Guide Included)
I’ve always wanted to download HVAC excel calculators to assist my design calculations. But, I…
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