HOW TO USE IT
How to use the Mini-Split Sizing and Installation Cost Calculator
- 1
Estimate the capacity: A rough rule is about 25 BTU per sq ft. For 1,200 sq ft that is around 30,000 BTU, but a real load calculation is needed for a final size.
- 2
Count the zones: Each indoor unit is a zone. Multi-zone systems cost more in units and install labor but condition separate rooms.
- 3
Add install and line set: Install labor is per zone and the line set covers refrigerant lines, wiring and insulation.
- 4
This is preliminary: Use the Mini-Split Sizing and Installation Cost Calculator to plan, but a final size and quote need a professional load calculation, inspection and permitting. These figures are not a definitive HVAC design.
THE MATH
Mini-split calculation method
Use the area for an indicative capacity, then multiply zones by unit and install cost. A 1,200 sq ft space suggests about 30,000 BTU, and 2 zones at $900 + $600 plus a $300 line set totals $3,300.Each indoor unit is a zone. Multi-zone systems cost more in units and install labor but condition separate rooms.
PRACTICAL EXAMPLE
Worked example for Mini-split
Use the area for an indicative capacity, then multiply zones by unit and install cost. A 1,200 sq ft space suggests about 30,000 BTU, and 2 zones at $900 + $600 plus a $300 line set totals $3,300.
FAQ
Frequently asked questions
How do you size and estimate a mini-split?
Use the area for an indicative capacity, then multiply zones by unit and install cost. A 1,200 sq ft space suggests about 30,000 BTU, and 2 zones at $900 + $600 plus a $300 line set totals $3,300.
What should I verify before using the result?
The area rule is a starting point. Confirm with a load calculation before the client orders equipment.
Is this a final quote or design?
No. Use it as a planning estimate, then confirm measurements, local rates, product requirements, permits and jobsite conditions before bidding or building.