928-569-8244
Home » Mobile Home HVAC and Ductwork Cost Calculator

Mobile Home HVAC and Ductwork Cost Calculator

Use this Mobile Home HVAC and Ductwork Cost Calculator to estimate the cost of repairing or replacing the heating, cooling, and air-distribution system in an Arizona mobile or manufactured home.
The calculator considers the home’s square footage, HVAC system type, equipment capacity, energy efficiency, duct length, duct condition, under-home access, electrical upgrades, permits, labor, and disposal expenses.
A complete mobile home HVAC replacement commonly costs about $2,500 to $9,500, while replacing damaged mobile home ductwork may add approximately $1,000 to $7,000. Complex projects involving new electrical service, difficult crawlspace access, extensive duct reconstruction, or high-efficiency equipment may exceed these ranges.
928-569-8244
Request Estimate

How to Use the Mobile Home HVAC and Ductwork Cost Calculator

Step 1: Enter the Mobile Home Square Footage

Enter the total conditioned floor area in square feet. Common mobile home sizes include:
  • 700 to 1,000 square feet for smaller single-wide homes
  • 1,000 to 1,500 square feet for larger single-wide or compact double-wide homes
  • 1,500 to 2,400 square feet for larger multi-section homes
The calculator uses square footage as an initial sizing input. Final HVAC capacity must be based on a professional heating-and-cooling load calculation rather than square footage alone.

Step 2: Select the Mobile Home Type

Choose:
  • Single-wide
  • Double-wide
  • Triple-wide or multi-section
A double-wide or multi-section home may require longer trunk lines, more branch ducts, additional registers, and more labor than a single-wide home.

Step 3: Choose the Project Type

Select the work required:

HVAC Repair

Choose repair for problems involving thermostats, capacitors, motors, contactors, refrigerant components, burners, controls, or limited electrical parts.

HVAC Equipment Replacement

Select this option when replacing the furnace, air conditioner, heat pump, packaged unit, or air handler without replacing all ductwork.

Ductwork Repair

Choose duct repair for disconnected, crushed, leaking, or poorly sealed duct sections.

Complete Ductwork Replacement

Select full replacement when ducts are extensively damaged, contaminated, improperly sized, or deteriorated beneath the home.

Complete HVAC and Ductwork Replacement

Choose this option for a new heating and cooling system combined with a complete air-distribution system.

Step 4: Select the HVAC System Type

Choose the proposed equipment:
  • Central air conditioner and furnace
  • Electric furnace with central air
  • Heat pump
  • Packaged HVAC unit
  • Ductless mini-split system
Heat pumps provide both heating and cooling. Packaged systems combine major components in one cabinet, while mini-splits may reduce the need for conventional ducts. The selected system must be designed and approved for use with the manufactured home.

Step 5: Enter the Equipment Capacity

Select the estimated cooling capacity in tons:
  • 1.5 tons
  • 2 tons
  • 2.5 tons
  • 3 tons
  • 3.5 tons
  • 4 tons or more
Larger systems usually cost more, but oversized equipment can cycle too frequently, reduce comfort, and increase operating problems. A licensed HVAC contractor should calculate the required capacity based on insulation, windows, air leakage, orientation, climate, occupancy, and duct performance.

Step 6: Select the Efficiency Level

Choose:
  • Standard efficiency
  • Mid-range efficiency
  • High efficiency
  • Premium variable-speed system
Higher-efficiency equipment typically has a greater initial cost. The calculator should also include possible costs for compatible controls, electrical work, condensate drainage, and duct modifications.

Step 7: Enter the Ductwork Length

Enter the number of linear feet requiring repair or replacement. Use: Duct length × installed cost per linear foot = ductwork cost General residential duct replacement can cost approximately $20 to $60 per linear foot installed, although mobile-home totals vary because many systems use specialized under-floor trunk ducts and branch connections.

Step 8: Select the Duct Condition

Choose the condition that best matches the system:

Minor Leakage

Select this option for limited air leaks that can be professionally sealed.

Disconnected or Crushed Sections

Choose this option when individual ducts have separated, collapsed, or become restricted.

Damaged Insulation

Select this option when ducts remain usable but their insulation or vapor barrier is torn or wet.

Extensive Deterioration

Choose complete replacement when the system has widespread leakage, contamination, corrosion, damaged trunk lines, or inaccessible failed connections.

Step 9: Add Duct Sealing and Insulation

Select whether the project requires:
  • Joint sealing
  • New connectors
  • Register-box sealing
  • Duct insulation
  • Vapor-barrier repair
  • Underbelly patching
Mobile home ducts often run beneath the floor or within the enclosed belly area, which can make access and repairs more difficult.

Step 10: Select Under-Home Access

Choose:
  • Easy access
  • Limited access
  • Difficult low-clearance access
  • Contaminated or unsafe crawlspace
Apply approximately:
  • 0% for easy access
  • 10% for limited access
  • 20% for difficult access
Standing water, sewage, damaged wiring, pests, or unstable supports should be corrected before HVAC ductwork begins.

Step 11: Add Electrical and Structural Upgrades

Select any required additional work:
  • New electrical disconnect
  • Breaker or circuit upgrade
  • Thermostat wiring
  • Equipment pad
  • Condensate drain
  • Gas-line modification
  • Roof or wall penetration
  • Underbelly repair
Electrical, refrigerant, fuel-gas, and major HVAC work should be completed by appropriately qualified professionals.

Step 12: Add Permit and Inspection Costs

Enter a verified local permit allowance. Arizona’s Office of Manufactured Housing oversees safety standards, permitting, inspections, licensing, and plan review for manufactured homes. The exact authority and permit requirement can depend on the project and jurisdiction.

Step 13: Add Labor, Disposal, and Contingency

The calculator should include:
  • Equipment installation labor
  • Ductwork labor
  • Old-system removal
  • Refrigerant handling
  • Material delivery
  • Disposal
  • Startup and testing
HVAC employee wages are not equivalent to contractor billing rates because contractor prices also include insurance, licensing, equipment, vehicles, overhead, and profit. The national median annual wage for HVAC mechanics and installers was $59,810 in May 2024. Add a contingency of:
  • 10% for straightforward equipment replacement
  • 15% for partial ductwork repair
  • 20% for complete HVAC and duct replacement
  • 25% for unknown or concealed under-home damage

Example Cost Calculation

Assume a 1,300-square-foot Arizona double-wide requires:
  • Heat-pump replacement: $6,000
  • 80 feet of ductwork at $30 per foot: $2,400
  • Electrical upgrades: $600
  • Disposal: $350
  • Permit allowance: $300
  • Limited-access adjustment: $500
Subtotal: $6,000 + $2,400 + $600 + $350 + $300 + $500 = $10,150 Add a 15% contingency: $10,150 × 15% = $1,522.50 Estimated total: $11,672.50

Mobile Homes HVAC and Ductwork Cost Calculator

Estimate mobile home HVAC and ductwork cost in Arizona based on system size, HVAC type, ductwork scope, access difficulty, electrical needs, cooling-load factor, and permit allowance.

Call Now

Disclaimer: This calculator provides an educational budget estimate only and is not an HVAC quote. Final pricing depends on Manual J load sizing, equipment brand, SEER2/HSPF2 rating, refrigerant type, duct condition, electrical capacity, roof/closet/crawlspace access, local permit authority, park rules, and contractor inspection. HVAC, refrigerant, electrical, gas, and permit-required work should be handled by qualified/licensed professionals where required.

Frequently Asked Questions

Replacing both the HVAC system and ductwork in a mobile home typically costs $2,500 to $12,500 or more, depending on the home size, HVAC system type, duct length, energy efficiency, labor rates, electrical upgrades, and permit requirements.
The calculator estimates project costs using your mobile home’s square footage, HVAC system type, equipment capacity, efficiency rating, ductwork length, duct condition, labor, under-home access, electrical upgrades, permits, disposal fees, and contingency to generate an estimated total cost.
The largest cost factors include the size of the mobile home, the type and capacity of the HVAC system, energy efficiency, the amount of ductwork being repaired or replaced, crawlspace accessibility, electrical modifications, labor costs, and local permit requirements.
If the existing ductwork is leaking, crushed, poorly insulated, contaminated, or more than a few decades old, replacing or professionally repairing it during HVAC installation can improve airflow, system efficiency, and indoor comfort. A qualified HVAC contractor should inspect the duct system before making this decision.
Permit requirements vary by city, county, and the scope of the project. HVAC replacements that involve new equipment, electrical work, gas connections, or major duct modifications often require permits and inspections. Check with your local building authority before starting the installation.
Scroll to Top