How to Estimate an HVAC Job: A Contractor's Pricing Guide
A step-by-step way to estimate and price HVAC jobs: counting true job costs, applying the right markup/margin, building an accurate quote, and avoiding the estimating mistakes that kill profit.
What Is Manual J? Heat & Cooling Load Calculation Explained
Manual J is the ACCA standard for calculating a home's heating and cooling load. What it is, the inputs it uses, how heat load and cooling load are calculated, and why it beats rules of thumb.
How Much Does Ductwork Replacement Cost? (2026 Pricing)
What new or replacement ductwork costs — by the foot, by the run, and for a whole house. The factors that move the price, repair vs full replacement, and how to estimate your job.
How to Size a Dehumidifier for Your Home
How to size a dehumidifier by square footage and dampness level, what the 2019 DOE pint rating change means, and when to choose a whole-house unit over a portable.
BTU per Square Foot for Air Conditioning: The Chart and the Math
How many BTU per square foot you need for cooling, with a room-size chart, the climate adjustments that change the number, and why 20 BTU/sq ft is only a starting point.