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WHITE MOUNTAINS SERVICES

Mobile Home HVAC and Ductwork in Show Low, AZ

At 6,300 feet in the White Mountains, your heating system is not optional. Show Low winters push overnight lows below 10 degrees Fahrenheit. A failing furnace or a leaking duct system means your home loses heat faster than your equipment can replace it. Show Low Mobile Home Contractors installs, repairs, and replaces heating and cooling systems on manufactured homes across Show Low and Navajo County. We work only on mobile home HVAC equipment, which must be rated and listed specifically for manufactured housing use. All HVAC work is performed by Arizona-licensed mechanical contractors, and all equipment replacements are permitted.
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OUR HEATING & COOLING SERVICES

Mobile Home HVAC and Ductwork Services We Offer

Every service below is matched to the equipment specifications and airflow requirements of HUD-code manufactured homes. All refrigerant work is performed by EPA Section 608 certified technicians.

Mobile Home Furnace Installation and Replacement

The right furnace for a manufactured home in Show Low needs to handle sustained cold weather at elevation. It must also be specifically rated for mobile home use per HUD 24 CFR 3280.703. Putting a standard residential furnace in a mobile home utility closet creates static pressure problems, airflow restrictions, and can void your home insurance policy. We install down-flow mobile home furnaces rated at 80,000 BTU or higher for larger double-wide homes in the Show Low area, sized against a Manual J heat load calculation for your specific floor plan and insulation level. After installation, combustion efficiency is measured at the flue outlet using a Testo 330-2 LL industrial combustion analyzer with CO2 and CO sensor probes, which reads flue gas composition and stack temperature simultaneously to confirm the burner is firing at peak efficiency before the job is signed off. All furnace replacements in manufactured homes are permitted through Navajo County Planning and Development Services and follow HUD 24 CFR 3280.703(a) heating system requirements, which mandate that all heating equipment in manufactured homes be listed by an ANSI-accredited testing laboratory specifically for manufactured housing use.

Mobile Home Central Air Conditioning Installation

Show Low summers are mild compared to Phoenix, but afternoon temperatures regularly reach the mid-80s and above at elevation, especially in July and August. A properly sized air conditioning system also removes humidity during the monsoon season, which protects the home’s insulation and ductwork from moisture buildup. We install packaged and split system air conditioners rated and listed for manufactured home use, including new R-454B refrigerant systems per the 2025 low-GWP refrigerant transition requirements. After installation, refrigerant circuit pressures and superheat are verified using a CPS Products CC480 commercial digital manifold gauge set with Bluetooth data logging, which measures high-side and low-side pressures simultaneously and logs readings to a service report for the permit inspection package. Central AC installation follows Arizona Mechanical Code Section 1105.1 cooling equipment installation requirements and Navajo County Planning and Development Services mechanical permit conditions for manufactured home HVAC equipment change-outs.

Mobile Home Ductwork Repair and Replacement

Belly-board duct systems in older manufactured homes are the most common source of heating and cooling loss in the Show Low area. A single disconnected branch duct can send 20 percent of the furnace output directly into the belly cavity instead of into the living space. Most homeowners notice higher bills and cold rooms long before they discover the disconnect. We access and repair belly-board ductwork through the underside of the home. New duct connections and collar fittings are cut and sized using a Rotozip RZRK50 spiral saw kit with the RCD-1 right-angle duct accessory, which cuts round collar openings and branch tee holes in existing trunk duct runs from inside the belly cavity without overcut damage to the duct board material at the collar perimeter. All ductwork repairs and replacements in manufactured homes follow HUD 24 CFR 3280.703(b) supply air distribution system requirements, which specify minimum duct material ratings, joint sealing methods, and insulation R-value requirements for below-floor manufactured home duct systems.

Mobile Home Heat Pump Installation

A heat pump works as both a heating and cooling system. In heating mode, it pulls heat from outdoor air and moves it inside. In cooling mode, it runs in reverse like a standard air conditioner. For Show Low homeowners on electric service, a heat pump can lower heating costs compared to a straight electric furnace because it moves heat rather than generating it. We install mobile home rated heat pump split systems with backup electric strip heat for the nights when Show Low temperatures drop below the heat pump’s balance point. Refrigerant line sets are brazed and pressure-tested before the system is charged. All brazing work at copper line connections is performed using a Harris Products Group Victor Professional torch kit with a 0.8mm brazing tip rated for ACR copper tube diameters, which produces the controlled heat zone needed for clean capillary-tight braze joints on 3/8-inch and 7/8-inch ACR copper line sets without overheating the adjacent aluminum line set insulation. Heat pump installations in manufactured homes follow AHRI Standard 210/240-2023 unitary air conditioning and heat pump equipment performance rating and require an Arizona Registrar of Contractors Class C-39 HVAC license for all refrigerant circuit work.

Mobile Home Mini-Split Installation

A mini-split is a ductless heating and cooling system. The indoor air handler mounts on the wall. A small refrigerant line set runs through a 3-inch core hole to the outdoor compressor unit. No ductwork is needed. This makes mini-splits a practical option for manufactured homes where the belly-board duct system is too damaged to repair cost-effectively. We install mini-split systems from brands with mobile home installation records, sized per room area and insulation level for the White Mountains climate. Before refrigerant is charged, the full refrigerant circuit is evacuated using a REMS Multi-Push SL deep vacuum rotary vane pump pulling to 50 microns, which removes all moisture and non-condensable gases from the line set before refrigerant is added, preventing acid formation and compressor contamination inside a brand-new system. Mini-split installations follow EPA Clean Air Act Section 608 technician certification requirements, which mandate that all refrigerant circuit handling and charging be performed by a certified technician using certified refrigerant management equipment.

Mobile Home Duct Sealing and Insulation

Sealing the duct system on an older manufactured home is one of the highest return-on-investment projects you can do. A duct system losing 30 percent of airflow means your furnace is 30 percent less effective. Sealing the leaks brings that lost capacity back without replacing any equipment. We seal all accessible duct joints, boot connections, and collar seams from inside the belly cavity using mastic sealant and fiberglass mesh tape. After sealing, the duct system is tested for total leakage using a The Energy Conservatory Minneapolis Duct Blaster Model B calibrated flow measurement fan system, which pressurizes the duct system to 25 pascals and measures total leakage in CFM. The post-seal result is documented in the job record and compared to the pre-seal baseline to confirm the improvement. Duct sealing performance targets follow ENERGY STAR Certified Homes Version 3.1 total duct leakage threshold of 4 CFM25 per 100 square feet of conditioned floor area, which is the nationally recognized benchmark for a tight duct system in a manufactured home installation.

Mobile Home HVAC Inspection and Tune-Up

Annual HVAC inspections catch small problems before they become large ones. In Show Low, the stakes are higher than in warmer climates. A heat exchanger crack that goes undetected through summer becomes a carbon monoxide hazard the first time the furnace runs hard in October. We inspect every combustion appliance in the home for CO production at the flue collar and at the supply air registers. CO concentration in the supply air stream is measured using a UEi Test Instruments CO71A residential carbon monoxide analyzer calibrated to 1 ppm sensitivity, which detects CO at levels well below the OSHA 25 ppm action threshold, confirming whether the heat exchanger has any crack or breach that allows combustion gases to mix with conditioned air before delivery to the living space. HVAC inspection work covers all required checkpoints under NFPA 54 National Fuel Gas Code Section 8.3.2 combustion air requirements for manufactured home heating appliances installed in confined spaces per the manufactured home utility closet combustion air opening specifications.

Mobile Home Air Handler and Coil Replacement

The air handler and evaporator coil are the indoor components of a split AC or heat pump system. Over time, the coil develops pinhole leaks from formicary corrosion, which is caused by formic acid in humid air. When the coil leaks, refrigerant escapes and cooling capacity drops. The fix is a coil or air handler replacement, not a recharge. Before any coil is removed, all refrigerant must be recovered per EPA regulations. We recover the full refrigerant charge using a Robinair 34288 single-cylinder refrigerant recovery machine with oil-less compressor rated for R-410A and R-454B, which captures the existing charge into a certified recovery cylinder for proper disposal or recycling, with a final system weight recorded on the service document for permit records. All refrigerant handling and recovery at air handler changeouts follows EPA Clean Air Act Section 608 refrigerant recovery requirements, which prohibit venting any refrigerant to atmosphere and require recovery to the lowest achievable level before any refrigerant circuit component is opened.
OUR DIAGNOSTIC PROCESS

How We Diagnose Your Mobile Home HVAC System

We start every HVAC job with a diagnostic check, not a sales pitch. We want to know exactly what is wrong before we recommend a solution.

Step 1: Duct Leakage Test

We test total duct leakage using a duct blaster pressurization system. This tells us how much air is escaping the duct system before it reaches the registers. Most older manufactured homes lose 25 to 40 percent of conditioned air through duct leaks.

Step 2: Equipment Performance Check

We measure supply and return air temperatures at the equipment and at the registers. We check static pressure across the blower. We review refrigerant pressures and combustion efficiency where applicable.

Step 3: Visual Belly Inspection

We inspect the belly board from the outside for tears, damage, or soft areas that indicate wet insulation below. If duct access is needed, we open the belly board and inspect the trunk and branch connections from inside the cavity.

Step 4: Written Findings and Options

We give you a written summary of what we found and what we recommend. If repair makes sense, we say so. If the system is too far gone, we explain why and what a replacement would cost.

WE SERVE SHOW LOW & white mountains

We Serve Show Low and the White Mountains Region

Our HVAC crew covers Navajo County and Apache County manufactured home sites. We are familiar with the altitude, temperature swings, and duct system configurations common across each community in the area.
  • Show Low, AZ 85901
  • Pinetop-Lakeside, AZ 85929
  • Snowflake, AZ 85937
  • Taylor, AZ 85939
  • Linden, AZ 85901
  • Heber-Overgaard, AZ 85928
  • Springerville and Eagar, AZ 85938
Not sure if we cover your location? Call us. We serve all of Navajo County and most of Apache County for mobile home HVAC work.

Why Show Low Homeowners Choose Us for Mobile Home HVAC

WE INSTALL THE RIGHT EQUIPMENT

We only install furnaces, heat pumps, and AC units that are rated and listed for manufactured home use. An unlisted unit in a mobile home can void your insurance and fail a permit inspection.

WE TEST, NOT GUESS

Every duct repair gets a before-and-after duct blaster test. Every furnace replacement gets a combustion analysis and a CO check. You get the actual numbers, not a verbal assurance.

WE KNOW THE BELLY SYSTEM

We have accessed and repaired belly-board duct systems on dozens of manufactured homes across Navajo County. We know how to get in, make the repair, and seal the board back up without creating new moisture problems.

WE PULL PERMITS

Mechanical permits for HVAC work in manufactured homes are required in Navajo County. We file the permit before work starts and coordinate the final inspection through Navajo County Planning and Development Services.

Get a Free Estimate for Mobile Home HVAC in Show Low, AZ

Is your furnace struggling to keep up? Are some rooms always cold no matter how high you set the thermostat? Show Low Mobile Home Contractors is ready to help. We serve Show Low, Pinetop-Lakeside, Snowflake, and all of Navajo County.
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🕐 Mon to Sat: 7:00 AM to 6:00 PM | Emergency Response Available

FAQ

Frequently Asked Questions

The correct furnace size depends on your home’s square footage, insulation level, number of windows, and the local design heating load. For Show Low at 6,300 feet, a single-wide typically needs 60,000 to 80,000 BTU. A double-wide needs 80,000 to 120,000 BTU. We perform a Manual J heat load calculation on every furnace replacement to confirm the right size before we order equipment.

No. HUD code requires that all heating equipment installed in manufactured homes be listed specifically for manufactured housing use. Standard residential furnaces have different static pressure ratings and combustion air requirements than mobile home units. Installing one creates a code violation, can void your insurance, and can cause carbon monoxide problems if the combustion air openings in the utility closet are not sized for the unit.

R-22 production was banned in the U.S. in 2020. If your system has a minor refrigerant leak, recovering recycled R-22 to recharge it is possible but expensive. For a significant leak or compressor failure, replacement with a new R-454B system is the better investment. We assess your current system and give you an honest comparison of repair cost versus replacement cost.

Common signs include rooms that are noticeably colder or warmer than others, a furnace that runs constantly without meeting the thermostat setpoint, and heating and cooling bills that seem high for your home’s size. We test duct leakage with a duct blaster pressurization system. Most older manufactured homes in the White Mountains area show 25 to 40 percent total duct leakage before repairs.

A mini-split is a good choice if your belly-board duct system is too damaged to repair cost-effectively, or if you want to add heating and cooling to a room or addition that has no existing duct supply. In Show Low’s winter temperatures, you need a mini-split with a rated heating capacity down to at least -5 degrees Fahrenheit. We only install cold-climate rated units for White Mountains applications.

Yes. Equipment replacements and new installations require a mechanical permit from Navajo County Planning and Development Services. Routine maintenance and filter changes do not. We pull the permit for all qualifying jobs and schedule the final inspection.

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