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Manufactured Home Sizing Tool

ENERGY STAR & HUD Standard equipment sizing guidelines

⚠️ Avoid Oversizing Equipment

Oversized HVAC equipment cycles on/off frequently, shortening equipment life, lowering efficiency, increasing power bills, and causing moisture problems. Use this tool to properly size equipment for manufactured homes.

How to Use This Tool

  1. Select the state and county where the home will be installed
  2. Enter the conditioned floor area of the home in square feet
  3. Select the home type (ENERGY STAR or HUD Standard)
  4. Click "Calculate Tonnage" to get your recommendation
  5. Always verify your design by test and balance after installation

Phoenix-area homes typically use Sizing Group 70

Enter the total conditioned living space (length × width)

ENERGY STAR homes are 30% more efficient and typically require less cooling capacity

Recommended Tonnage
0
Important: This is a guideline only. Always verify by test and balance. Install dampers as needed. If duct run exceeds 25' or has excessive transitions, consider increasing to the next size.

Phoenix Area Reference Table (Sizing Group 70)

Most Phoenix-area manufactured homes fall in Sizing Group 70. Blue columns = ENERGY STAR homes, tan columns = HUD Standard homes.

Sizing
Group		 Up to
840 sq ft		 841 to
1,120 sq ft		 1,121 to
1,280 sq ft		 1,281 to
1,440 sq ft		 1,441 to
1,680 sq ft		 1,681 to
1,960 sq ft		 1,961 to
2,240 sq ft		 2,241 to
2,520 sq ft		 2,521 to
2,760 sq ft		 2,761 to
3,000 sq ft
ES HUD ES HUD ES HUD ES HUD ES HUD ES HUD ES HUD ES HUD ES HUD ES HUD
70 2 2.5 2.5 3 3.5 4 4 5 4 5.5 4.5 5.5 5 6 5.5 7 5.5 7.5 6 8
62 2 1.5 2.5 2.5 3.5 3.5 4 4 4 4.5 4.5 5 5 5.5 5 6 5.5 6.5 6 7
25 1.5 1.5 1.5 1.5 3 3 3 3.5 3 3.5 3 4 3.5 4 3.5 4.5 4 4.5 4 5

Note: ES = ENERGY STAR qualified homes | HUD = Homes built to HUD thermal standards