What a Manual J Load Calculation Is and Why It Matters

https://nyc3.digitaloceanspaces.com/mass-hvac/uncategorized/12-things-to-know-before-adding-central-air-to-an-old-home.html

If you've gotten even one HVAC estimate in Massachusetts, you've probably heard the phrase "Manual J." Contractors mention it, utilities reference it, and rebate programs require it