HVACDirect.com Equipment Guide

How to Choose a Replacement Mobile Home HVAC System

The easiest way to start shopping for a mobile home HVAC system is to identify what you already have. Your furnace, outdoor unit and indoor coil labels can tell you the current heating type, cooling size, refrigerant and electrical requirements. Use this guide to collect the basics before comparing replacement equipment.

Find the current model numbers
Match the heating type and AC tonnage
Choose manufactured-home-approved equipment

Start with the current system, but do not assume it is perfect. Matching the existing size is usually the simplest replacement starting point. If the home has never heated or cooled evenly, the equipment short cycles, rooms have weak airflow, or the home has been enlarged or remodeled, ask an HVAC professional to verify the load and ductwork before changing sizes.

Step 1: Find the Equipment Labels

You do not need to understand every number on the labels. Take clear pictures of each complete rating plate so you can reference the information while shopping or send the photos to an equipment specialist.

Indoor furnace

Look inside the normal furnace access door or on an interior cabinet wall. Record the complete model number, heating type and heating capacity.

Outdoor unit

Find the label on the outdoor air conditioner or heat pump. Record the complete model number, refrigerant, voltage and phase.

Indoor coil

Look for a separate model number on the coil cabinet above or below the furnace. The coil must match the new outdoor unit.

Use the model number, not just the serial number. The model number identifies the equipment family and specifications. The serial number usually identifies the individual unit and production date. Keep both, but shop using the complete model information.

Step 2: Identify the Type of Mobile Home HVAC System

Most manufactured homes use one of the following heating and cooling arrangements.

Air Conditioner + Furnace

An outdoor air conditioner connects to an indoor coil installed with a gas, propane, oil or electric mobile home furnace.

Heat Pump + Electric Furnace

The outdoor heat pump provides heating and cooling. The indoor electric furnace or air handler supplies the blower and backup heat.

Packaged HVAC System

Heating and cooling components are combined in one outdoor cabinet connected to the home through ductwork.

Heat-Only Furnace

The home has a furnace but no outdoor central cooling unit. Adding AC may require a compatible blower, coil, electrical circuit and accessories.

Important: equipment made for a conventional site-built house is not automatically approved for a mobile or manufactured home. Look for products specifically designed and listed for manufactured-housing applications.

Step 3: Find the Current Air Conditioner or Heat Pump Size

The outdoor model number often contains a number that represents cooling capacity in thousands of BTU per hour. For example, a model containing 036 commonly belongs to the 36,000 BTU, 3-ton size class.

Common model-number code	Cooling capacity	Nominal size
`024` or `24`	24,000 BTU/h	2 tons
`030` or `30`	30,000 BTU/h	2.5 tons
`036` or `36`	36,000 BTU/h	3 tons
`042` or `42`	42,000 BTU/h	3.5 tons
`048` or `48`	48,000 BTU/h	4 tons
`060` or `60`	60,000 BTU/h	5 tons

Model-number formats vary, so treat the code as a clue rather than a universal decoder. Search the complete model number or ask an HVACDirect.com specialist to confirm the published capacity.

Do not confuse furnace BTU with air conditioner BTU. A furnace rated at 60,000 BTU/h may describe heating input. It does not mean the home has a 5-ton air conditioner. Read the outdoor cooling model separately.

Step 4: Match the Current Heating Type

The replacement furnace must work with the available utility and the home’s approved installation. Check the furnace rating plate before choosing natural gas, propane, oil or electric heat.

Current heating type	What to record	What to match
Natural gas or propane furnace	Fuel, input/output BTU/h, AFUE and vent type	Fuel, heating capacity, approval, venting and cabinet arrangement
Electric furnace	Heat-kit kW, voltage, circuit data and blower size	Electrical service, heating capacity, blower and airflow direction
Oil furnace	Fuel, input/output rating, burner and vent information	Approved oil furnace, heating capacity, venting and physical fit
Heat pump with backup heat	Outdoor heat-pump size and indoor electric-heat kW	Matched heat pump, coil, controls, blower and auxiliary heat

Natural gas and propane are not the same. Do not order a furnace or conversion kit based on appearance. Verify the current fuel and use only conversion equipment approved for the exact furnace model.

Step 5: Match the Outdoor Unit and Indoor Coil

The outdoor air conditioner or heat pump and the indoor evaporator coil operate as one system. The new equipment must use the same approved refrigerant family and be a certified equipment combination.

Current refrigerant	What it means for replacement
`R-22`	This is a legacy system. Replacing the outdoor unit and indoor coil together is commonly the practical path.
`R-410A`	Do not connect a new R-32 or R-454B outdoor unit to the existing R-410A coil.
`R-454B`	Use an R-454B-approved outdoor unit, coil and required A2L safety components.
`R-32`	Use an R-32-approved system and the installation provisions required for that product.

A coil with the same nominal tonnage is not automatically a match. Check the complete outdoor and coil model numbers against the manufacturer’s approved combination.

Step 6: Check the Furnace Fit and Airflow Direction

Mobile home HVAC equipment often fits into a narrow utility closet and connects to ductwork below the floor. Measure the current installation and confirm these details before ordering.

Downflow or Upflow

Many mobile home furnaces are downflow units that send conditioned air into a floor duct. Match the actual airflow direction.

Furnace Cabinet

Record the existing furnace width, depth and total installed height. Older cabinets may use a narrower footprint.

Coil Box Height

Measure the space used by the current coil cabinet. Replacement arrangements may use different coil-box heights.

Return Air

Note whether return air enters through a louvered furnace door, grille, top, side or floor connection.

Blower Capacity

The furnace blower must support the cooling airflow required by the new outdoor unit and coil.

Electrical Service

Record voltage, phase, MCA, MOCP and electric-heat circuit requirements from the exact equipment labels.

What Mobile Home HVAC Equipment Should You Buy?

Once you know the current system type, use these starting points to browse replacement equipment.

Replace the Entire Heating and Cooling System

Shop a complete mobile home AC and furnace system when the furnace, coil and outdoor unit all need replacement.

Shop Complete Mobile Home HVAC Systems

Replace the Air Conditioner and Indoor Coil

Shop an AC and coil system when the existing furnace can remain and has the correct blower, coil space and compatibility.

Shop Mobile Home AC & Coil Systems

Replace Only the Outdoor Air Conditioner

Replace only the outdoor unit when a professional confirms the indoor coil, blower, refrigerant and system rating are compatible.

Shop Mobile Home Air Conditioners

Replace the Mobile Home Furnace

Match the fuel or electric heat type, heating capacity, airflow direction, blower, cabinet size, venting and manufactured-home approval.

Shop Mobile Home Furnaces & HVAC

Still Not Sure Which Mobile Home HVAC System You Need?

Have clear pictures of the furnace, outdoor unit and coil labels ready. An HVACDirect.com equipment specialist can help identify your current system and compare manufactured-home-approved replacement options.

Shop Mobile & Manufactured Home HVAC