Manufactured Home Gas Furnaces – A Replacement Shopping Guide

Just like is the case with conventional homes, manufactured homes too, need a heating source to keep you warm throughout the colder months of winter. The furnace is the most popular heating equipment used in mobile homes, especially the modern models. While mobile home furnaces that run on electricity, oil, and gas are available, manufactured home gas furnaces are the most common heating systems in prefab homes. These furnaces are ducted, vented, and installed a bit differently from the ones in standard conventional homes.

Due to reasons such as irreversible damage or the need to upgrade to a more efficient unit, it is not uncommon for mobile home owners to find themselves in need of buying replacement furnace units. However, the process can be more intimidating than it sounds if you don’t know exactly what to put into consideration when seeking a replacement unit. Below are some pointers to help you out through the process and make it less daunting for you.

The Difference between Standard and Manufactured Home Gas Furnaces

The main difference between mobile home gas furnaces and their conventional home counterparts is that they are mostly smaller than the ones used in conventional site-built homes. Their ducting systems are also smaller and they use a venting system known as sealed combustion or a roof jack. This is because most of them lack an exhaust or duct leading to the outside of the home. They normally have a fan blower and other components that are specifically designed for mobile homes. For this and other reasons, manufactured homeowners should always make sure that when going for a replacement unit, they choose one that is approved for use in a mobile home. Below are some more tips to use when buying a replacement gas furnace for your manufactured home.

Check the Labels

As earlier stated, it is always important to ensure you buy a unit that is approved for use in a manufactured home. This approval information is located on a label or the unit’s metal data plate. Always ensure that the unit you buy has this information or else, it might void your warranty and interfere with your insurance coverage.

Efficiency Ratings

Just like it is with conventional home heating systems, energy efficiency is an important consideration when buying manufactured home gas furnaces for replacement. Energy efficiency in furnaces is represented by a number called AFUE, which is the percentage of fuel energy input converted into heat to warm up your manufactured home.

In full, AFUE refers to the Annual Fuel Utilization Efficiency. The higher the number, the more efficient the unit is. Most manufactured home gas furnaces have an AFUE rating ranging between 80% and 90%.

Proper Sizing

Just like efficiency ratings, proper sizing is highly important when buying a new gas furnace for your mobile home. An oversized furnace or a unit with a capacity too large will end up costing more in terms of operation.

This is mostly due to rapid cycling, a situation in which the unit goes on and off too often. Rapid cycling makes the unit less energy efficient, meaning that you have to pay more for your energy bills (gas) every month.

On the same note, an undersized furnace will end up working too hard to meet your manufactured home’s heating demands, leading to higher costs of operation and consequently higher energy bills. The best way to determine the proper furnace size is to work with an experienced HVAC contractor who will calculate the amount of heating required in your home based on the size of the area that requires heating.


Due to it being clean and less expensive, gas is the most popular fuel used in manufactured home furnaces. Your gas furnace will either use propane or natural gas. Most of it will cost somewhere between $800 and $1,500 depending on efficiency and size. However, the cost of replacement will also include installation labor.

This mainly will depend on the HVAC technician you choose for the job. Most professionals charge an hourly rate, even though companies that provide the service at a fixed charge are also available. You may also decide to switch from gas to electric furnace. This project cost will obviously be higher due to the modifications involved during installation.