5 HUD-Approved Gas Water Heaters for Mobile Homes

Finding the perfect gas water heater for your mobile home can be challenging, especially when considering safety and compliance with HUD regulations. But don’t worry; we’ve got you covered! In this handy guide, we’ll introduce you to some top-notch HUD-approved gas water heaters designed specifically for mobile homes. These models ensure you can enjoy a steady hot water supply without compromising safety or efficiency. So, let’s dive in and explore these fantastic options that will keep you warm and cozy in your mobile home.

Gas Water Heaters for Mobile Homes

Types of Gas Water Heaters for Mobile Homes

Ready to explore the world of gas water heaters for mobile homes? Let’s dive into the different types available so that you can find the perfect fit for your cozy space.

1. Tankless gas water heaters

Say goodbye to bulky tanks! These sleek units heat water on demand, meaning you’ll never run out of hot water again. Plus, they’re super space-saving and energy-efficient. The catch? They can be a bit pricey upfront but will save you money in the long run.

2. Storage tank gas water heaters

The classic choice! These heaters store and heat a large volume of water in a tank, so you’ll always have hot water ready. They come in various sizes to suit your needs. Keep in mind, though, they can be less energy-efficient than tankless options and might take up more space.

3. Direct vent gas water heaters

Safety first! These heaters pull fresh air from outside for combustion and vent the exhaust gases directly. It’s great for mobile homes because it reduces the risk of gas leaks and carbon monoxide buildup. Just remember, you’ll need to install it near an exterior wall for proper venting.

4. Power vent gas water heaters

Meet the high-tech sibling of direct vent heaters! These units use a fan to push exhaust gases outside, giving you more installation flexibility. They’re energy-efficient and versatile but can be noisier and pricier than other options.

Factors to Consider When Choosing a Gas Water Heater

water heater for mobile home gas

So, you’re ready to choose a gas water heater for your mobile home? Let’s discuss the factors you must consider to make the best decision for your needs.

  • Energy efficiency ratings

Keep an eye on the Energy Factor (EF) and Thermal Efficiency (TE) ratings – the higher, the better! They tell you how much energy your heater uses to heat your water. An energy-efficient model will save you money and be kinder to the environment.

  • Tank capacity

Consider your household’s hot water needs if you’re going for a storage tank heater. A bigger tank means more hot water but takes up more space and can be less energy-efficient. Make sure to strike the right balance!

  • Recovery rate

It is how fast your water heater can heat a freshwater tank. A higher recovery rate means less waiting time for hot water – great for larger families or those who love long showers!

  • Venting options

Mobile homes need proper ventilation to protect you from gas leaks and carbon monoxide. Direct vent and power vent heaters are popular choices, but ensure you have the appropriate setup for your chosen model.

  • Space requirements

Measure your available space and double-check the heater’s dimensions before you buy. Tankless models are great for tight spaces, while storage tank heaters might need more room.

  • Gas type

You’ll need to choose between natural gas or propane. Check what’s available in your area and compatible with your mobile home setup.

What Size Gas Water Heater do I need for a Mobile Home?

gas water heater for a mobile home

The size of the gas water heater you need for your mobile home depends on your household’s hot water usage and your chosen type of heater (tankless or storage tank). Let’s walk through an example to help you figure out the right size for your needs.

Tank gas water heater size

Suppose you have a family of four living in a mobile home, and you’re considering a tank gas water heater. To determine the proper tank capacity, you need to estimate your household’s peak hour demand – the maximum amount of hot water you’ll use during the busiest hour of the day. Here’s a quick breakdown of average hot water usage for everyday activities:

  • Shower: 7-15 gallons
  • Bath: 15-20 gallons
  • Dishwasher: 5-10 gallons
  • Washing machine: 6-10 gallons

Let’s say your peak hour demand includes four showers (7 gallons each), one dishwasher cycle (5 gallons), and one load of laundry (6 gallons). Your peak hour demand would be (4 × 7) + 5 + 6 = 39 gallons.

In this example, you would need a tank gas water heater with at least 39 gallons capacity to meet your peak-hour demand. 

Tankless gas water heater size

If you’re considering a tankless gas water heater, you’ll need to focus on flow rate instead of tank capacity. To calculate the required flow rate, add the flow rates (gallons per minute or GPM) of all the fixtures you expect to use simultaneously. For instance, if you want to run two showers (2.5 GPM each) and a dishwasher (1.5 GPM) simultaneously, your tankless gas water heater should have a flow rate of at least 2.5 + 2.5 + 1.5 = 6.5 GPM.

Remember, these are just guidelines. You should adjust the calculations based on your specific hot water usage patterns and preferences.

5 Best HUD-Approved Mobile Home Gas Water Heaters

Regarding mobile homes, choosing a HUD-approved gas water heater designed specifically for your unique living space is crucial. Below, we’ll introduce you to some fantastic options that meet HUD standards:

1. Rheem PROG40-34N RH62 MH 40 Gallon Gas Water Heater

Rheem PROG40-34N RH62 MH 40 Gallon Gas Water Heater for Mobile Homes

The Rheem PROG40-34N RH62 MH is a 40-gallon gas water heater designed specifically for mobile homes. This model is certified for manufactured (HUD) and modular construction, making it a reliable and safe choice for your mobile home.

The PROG40-34N RH62 MH features an atmospherically vented design and a convertible gas control valve, which allows you to use either natural gas or liquid propane for fuel. Its 34,000 BTU/hour low NOx burner is environmentally friendly and provides plenty of hot water for households with 2 to 4 people.

This water heater has a factory-installed temperature and pressure relief valve on the side for added safety. The piezo ignition system ensures easy, match-free lighting for the pilot. The heater will automatically disable itself in flammable vapor accumulation to prevent accidents.

The premium-grade anode rod offers long-lasting tank protection, ensuring the durability of your water heater. This model is certified for use up to 8,400 feet above sea level, making it suitable for various locations.

Optional leg kits are available for replacement units, making installation a breeze. The Rheem PROG40-34N RH62 MH also comes with a 6-year limited tank and parts warranty, giving you peace of mind in your investment.

2. A.O. Smith G6-MH4035NVR 40 Gallon Gas Water Heater

A O Smith G6-MH4035NVR 40 GallonMobile Home Gas Water Heater

The A.O. Smith G6-MH4035NVR is a 40-gallon gas water heater specifically designed and HUD-approved for mobile homes and manufactured housing applications. When sized appropriately, this model offers efficient and reliable hot water for households with 3 to 4 people.

Equipped with an environmentally friendly 35,500 BTU Low NOx gas burner, the G6-MH4035NVR can be converted from natural gas to liquid propane for added versatility. This model delivers 59 gallons of hot water in the first hour, ensuring ample supply for your daily needs.

The electronic gas valve in the G6-MH4035NVR provides precise temperature control for optimal hot water delivery without needing an external power source. Its self-diagnostic system incorporates an LED status indicator that monitors and reports on the operational status of the water heater.

Safety is a priority with the built-in safety system designed to reduce the risk of accidental flammable vapor ignitions. The tall and slim profile, measuring 61.75 inches high and 20 inches in diameter, makes installation in your mobile home a breeze.

The protective anode rod and fused ceramic tank shield provide superior tank protection, extending the life of your water heater. The G6-MH4035NVR is also high-altitude certified, suitable for locations from 0 ft to 10,100 ft above sea level.

3. Reliance 640MDV 40 Gallon Gas Water Heater 

Reliance 640MDV 40 Gallon Mobile Home Gas Water Heater

The Reliance 640MDV meets HUD requirements for manufactured housing. It features an eco-friendly Green Choice® gas burner, which reduces NOx emissions by 33% compared to standard burners. It means you’re getting an efficient water heater and doing your part to help the environment.

With its piezo igniter, you can easily ignite the pilot with just one hand, eliminating the need for matches. The PEX dip tube is another useful feature, contributing to the efficient heating of your water.

The glass-lined tank, along with an anode rod, protects against corrosion, ensuring the longevity of your water heater. The “Environmentally-Friendly” Non-CFC foam insulation helps maintain the water’s temperature for an extended period, saving energy.

Factory-installed PEX polymer-lined heat trap nipples and a temperature and pressure (T&P) relief valve further add to the convenience and safety of this model. Side taps make installation a breeze, ensuring you can easily integrate this water heater into your mobile home.

The Reliance 640MDV comes with a 6-year limited tank and parts warranty and a 1-year labor warranty, providing peace of mind when investing in this efficient and environmentally-friendly gas water heater for your mobile home.

4. Richmond MVR30DV3 30 Gallon Gas Water Heater

Richmond MVR30DV3 30 Gallon Mobile Home Gas Water Heater

The Richmond MVR30DV3 is UL-approved for manufactured housing. With a 30,000 BTU natural gas and 30,000 BTU propane burner, the 30-gallon tank provides ample hot water for your mobile home. The push-button ignition ensures a match-free start-up. The convertible control allows use with natural gas or LP (shipped natural gas ready).

The MVR30DV3 is backed by a 6-year tank, limited parts warranty, and a 2-year in-home labor warranty, giving you peace of mind in your investment. The hot and cold water connections are side-mounted on the heater for fast and easy installation.

Maintenance is a breeze with the easy-to-maintain filter and maintenance-free safety system. The low-input pilot helps conserve energy, while the factory-installed temperature-and-pressure relief valve adds an extra layer of safety to the water heater.

In summary, the Reliance MVR30DV3 30-gallon gas heater offers an efficient and versatile solution for hot water in your mobile home. With its direct vent design, energy-conserving features, and comprehensive warranty, you can trust this water heater to keep your hot water flowing.

5. Rinnai RE180eP 8.5 GPM Gas Tankless Water Heater 

Rinnai RE180e 8.5 GPM Gas Tankless Water Heater for Mobile Home

According to this site, the Rinnai tankless water heater is certified for installation in manufactured (mobile) homes. This tankless water heater is available in natural gas or liquid propane options. 

The Rinnai RE180eP features 180,000 BTUs and a flow rate ranging from 0.13 to 8.5 GPM. The minimum GPM is perfect for low-demand uses, such as shaving, where warm water is needed but not at a high rate. This tankless water heater is ideal for homes with two bathrooms. It can optimally handle the simultaneous use of 3 to 4 fixtures simultaneously.

The RE180eP has an integrated controller, allowing you to adjust the temperature settings from a minimum of 98°F to a maximum of 140°F. The unit offers maximum settings at 125°F with an option to increase to 140°F, giving you control over your hot water preferences.

In summary, the Rinnai RE180eP 8.5 GPM gas tankless water heater is an efficient and versatile option for mobile homes. With its high BTU output, adjustable flow rate, and ability to handle simultaneous fixture use, this water heater is an excellent solution for ensuring hot water when needed.

Mobile Home Gas Water Heater Costs

hot water heater for mobile home gas

The cost of a mobile home gas water heater can vary depending on the brand, capacity, and features. Here is a general overview of the costs associated with purchasing and installing a gas water heater for your mobile home:

  • Purchase cost

A mobile home gas water heater typically ranges from $400 to $1,200. This cost depends on the brand, tank capacity, efficiency rating, and additional features, such as energy-saving technology and warranty coverage.

  • Installation cost

Installing a gas water heater in a mobile home can range from $300 to $1,000 or more. Depending on the complexity of the installation, labor rates, and whether any modifications are needed to accommodate the new water heater. This cost typically includes removing and disposing of the old unit and installing the new one. Keep in mind that hiring a licensed professional is highly recommended, as they will ensure proper installation and adherence to safety codes.

  • Additional costs

Additional costs may be associated with the installation, such as purchasing a water heater stand, drip pan, or venting materials. Also, consider the cost of any necessary permits or inspections required by your local jurisdiction.

  • Operating costs

The ongoing cost of operating a gas water heater will depend on the unit’s efficiency, fuel type (natural gas or propane), and local fuel costs. Energy-efficient models may have higher upfront costs but can save you money on utility bills in the long run.

In summary, the total cost of purchasing and installing a mobile home gas water heater can range from $700 to $2,200 or more, depending on various factors. Consider your specific needs and preferences when selecting a water heater and the potential long-term savings from energy-efficient models.

How to Install a Gas Water Heater in a Mobile Home

Install a Gas Water Heater in a Mobile Home

Installing a gas water heater in a mobile home requires careful planning and adherence to safety guidelines. Here is a step-by-step guide to help you with the installation process:

Tools and materials

You will need a pipe wrench, pipe sealant, pipe connectors, venting materials, and a HUD-approved gas water heater for mobile homes.

Step-by-step installing a gas water heater:

  1. Turn off utilities: Before installing, shut off the existing water heater’s gas and water supply. Also, turn off the electricity if the old unit has an electrical connection.
  2. Drain the old water heater: Attach a garden hose to the drain valve and empty the tank. Open a hot water faucet in the mobile home to allow air into the system.
  3. Disconnect and remove the old water heater: Carefully disconnect the gas line, venting system, and water lines from the old water heater using a pipe wrench. Remove the old unit and dispose of it according to local regulations.
  4. Position the new water heater: Place the new gas water heater in the designated location, ensuring it is level and has proper clearance from walls and combustible materials. Use a drip pan or water heater stand for additional safety if required.
  5. Install water lines: Connect the cold and hot to the new water heater using pipe connectors and sealant. Be sure to follow the manufacturer’s recommendations for the specific connector type.
  6. Install venting system: Installing the venting system according to the manufacturer’s instructions and local codes. Depending on the type of gas water heater you’re installing, it may include a power vent or direct vent system.
  7. Connect the gas line: Apply pipe sealant to the gas line connections and attach the gas line to the new water heater using a pipe wrench. Ensure the connection is secure and leak-free.
  8. Test for gas leaks: Turn on the gas supply and use a gas leak detection solution or soapy water to check for leaks around the gas line connections. If you find a leak, turn off the gas supply, tighten the connections, and test again.
  9. Fill the tank and purge air: Turn on the cold water supply to fill the tank. Open a hot water faucet in the mobile home to purge air from the system. Once water flows smoothly from the faucet, close it.
  10. Light the pilot: Follow the manufacturer’s instructions to light the pilot, typically using the built-in igniter. Adjust the temperature setting on the water heater as desired.
  11. Inspect the installation: Double-check all connections and venting systems, and ensure the water heater is functioning correctly.

Installing a gas water heater can be complex and potentially dangerous. If you’re unsure about any part of the process, it’s best to consult a professional plumber or technician to ensure a safe and proper installation.


In conclusion, finding the right gas water heater for your mobile home is crucial for comfort and safety. Remember to choose a HUD-approved model specifically designed for mobile homes. And consider factors like size, efficiency, and installation requirements when deciding.