Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

My event is estimated at attendees, for hours.
  • Will there be more women than men?
  • Will there be alcohol served?

Your Estimated Sanitation Services

Based on what you've told us, we've generated this estimate for your needs.

If you have more details or would like expert advice to make sure you get the best sanitation solution, please call us at 800.210.8407.

Estimated Standard Portable Restrooms Needed:0
Estimated Hand Wash Stations Needed:0
Estimated Enhanced Access Restrooms Needed:0

Looking for a custom quote on those items?


Heater Rentals in Missouri – Why Choose On Site?

Heater Rentals in Missouri - Why Choose On Site Companies?

Making sure your construction project is properly equipped for those cold winter months with heater rentals in Missouri is crucial. Doing so can ensure productivity and prevent any delays in the project. Heater rentals are definitely popular and in high demand during the winter season. They are essential to prevent ground freezing and efficiently cure concrete. They also protect construction workers from weather related hazards when on the job. Choosing the right heating company can ensure your project’s success. So how do choose the right provider for heater rentals in Missouri? Here are 3 reasons why On Site Companies is the right choice for your temporary heating solutions:

Infrastructure Infrastructure – Providing Heat Wherever You Need It

On Site Companies Branches for Heater Rentals

For over 30 years, On Site Companies has been an industry leading temporary heating company. This family owned and certified women-owned business has a branch located in St. Louis, Missouri and four branches in Minnesota. We provide heater rentals for construction projects, special events, homeowners, and emergency response. On Site is constantly updating its fleet of trucks to ensure services go smoothly and quality of service is maintained.

We also have computerized routing. This type of routing helps keep track of all drivers during their routes and efficiently designate assignments across the five branches. Each On Site truck is equipped with an Apple iPad where drivers log in each stop. This keeps each completed service on record throughout the day. Constant and immediate communication between team members of Operations and Dispatch ensure that we ultimately satisfy all of our customers’ needs.

InventoryInventory – Heater Rentals in Missouri, And So Much More

F400T Direct Fired Heater - Heater Rentals in MissouriOn Site offers a variety of temporary heaters for jobs of any size. Depending on the project’s needs, we can provide different kinds of heaters such as direct fired, direct fired enclosed flame, and indirect fired heaters. We also offer ground thaw, electric, and convection heaters. Climate control accessories like thawing blankets are also available for rent along with ground heaters. We are also constantly upgrading our inventory to offer the best quality job site heaters. Check out our brand new F400T Direct Fired Heaters! (pictured left).

On Site is proud of having the most hardworking HVAC staff on board and we are also constantly looking for new members to join our team. We get the job done the right way with enough heating equipment, units, and staff to service sites of all sizes.


UrgencyUrgency – Rain Or Shine!

On Site heater rentalWhen it comes to the need of heater rentals for a project or event, it is usually an urgent matter. Not having a heater available when needed can result in delays in a project due to weather conditions. But fear not! No matter when you need your heater picked up, serviced, or dropped off On Site will find the best solution for your circumstance. Our staff is willing to best accommodate heater rental requests that are last minute, overnight, and on weekends. Our sense of urgency is to benefit the customer’s requests and needs, as well as be responsive to find the right heater equipment for the situation.

We also attentively work side by side with first responders when disaster strikes. On Site’s emergency HVAC response can provide temporary heating solutions for extreme weather conditions. Our heaters and heating accessories are available for any emergency to provide comfort to anyone affected by unexpected events.


3 Uniques That Make On Site Your Top Choice For Heater Rentals

At On Site Companies, we strive to provide the highest quality service of any heating company in the industry. Our infrastructure, inventory, and sense of urgency allow us to serve our clients expertly and individually for any occasion. We are committed to providing the most effective temporary heating solutions, whether it be for a construction project, event, home remodel, or emergency response. In need of heater rentals in Missouri and beyond? Get a free quote or contact us and an On Site representative will promptly assist.

Read more

Portable Heater Mistakes To Avoid

Portable Heater Mistakes To Avoid

It’s getting colder out there! Making sure your gas portable heater is working properly must be a top priority. This can decrease the chances of unwanted heater mishaps. When renting out a portable heater, you want to ensure construction projects are completed successfully and without setbacks. Lack of knowledge when operating a portable heater might lead to unexpected malfunctions. Luckily, we’re here to help! Here are some portable heater mistakes to avoid:


Mistake #1: Restricting Ventilation Of The Portable Heater Duct

Portable Heater - HVF 410

A common mistake users make when setting up a portable heater is bending the heater duct. Bending the duct creates an obstacle for the warm air and restricts proper air flow. If the air is unable to flow freely throughout the duct, the heater will eventually shut off. The best thing to do is to make sure the duct is set up straight. Reducing the bends on the heater prevents overheating. As a result, your heater will be able to maximize its efficiency and prevent delays on your project.



Mistake #2: Not Troubleshooting Your Portable Heater Correctly​

Portable Heater - F-400T Direct Fired Heater Set-up

Most of the times a user comes across heater malfunctions, the fastest way to fix the issue is to turn to troubleshooting instructions. Luckily, the issue is most likely a quick “troubleshoot fix” away. However, instructions can sometimes be overlooked or misread.  Taking the time to carefully read through the instructions and following the indicated steps will most likely solve your heater malfunction. For instance, in a lot of the cases things like checking the power outlet, gas tank, or leaks could indicate the issue. If you’ve rented out an On Site standard or ground heater, please make use of our troubleshooting checklist.  We provide an easy step-by-step guide for our heater users. Carefully read through instructions before turning to professional assistance.


Mistake #3: Improper Placement Of Thermostat

Premier 170 Direct Fired Heater Thermostat

A portable heater’s thermostat ultimately controls the way the heater is going to function. Particularly the temperature of the heat output, as well as the amount of gas consumed. The placement of the heater thermostat control could affect the readings. Our heat technicians advise not to place the thermostat control on the floor. This could result in inaccurate temperature readings. The thermostat control would be best placed close by the heater and off the floor. As a result, this could prevent portable heater mistakes caused by imprecise temperature readings.


Mistake #4: Not Having Enough Gas Tanks For Your Portable Heater

Portable Heater -Direct Fired Enclosed Flame Heater On Site

Deciding on the amount and size of a gas tank for your heater could be a tricky task. Without proper knowledge on the specifications of your heater, you could mistakenly set up your heater with the wrong amount of gas. Some factors to take into consideration when purchasing gas tanks for your heater are the space where it will be placed, as well as the heater’s BTU (British Thermal Units).

One way to determine the amount of liquid propane for your heater is to base yourself out of the fact that the heater requires 1.1 gallons of liquid propane for every 100,000 BTU. You can determine the BTUs by taking a look at the product’s specifications. For On Site heaters, you can easily find this information on every heater product page. For example, our F400T  and S405 Direct Fired Heaters have a heat output of 400,000 BTU/hr. This means that these particular heaters use about 4.4 GPH (gallons per hour) of liquid propane, or 400 CFH (cubic feet per hour) of natural gas. Our On Site Heat Technicians advise users to rent these heaters out with at least four 100-gallon gas tanks for proper functionality.


Mistake #5: Choosing The Wrong Portable Heater

Portable Heater - Q375 Convection Heater

Choosing the right heater for your project is essential to prevent any mishaps on site. The correct type of heater to rent out could depend on how far along the construction project is. For example, convection heaters are only recommended if there’s no power on site. This makes them ideal to use when the construction project is on its foundation stages. The flame of the heater can be measured with its gas tank, which makes it more difficult to use when the project is more advanced. For more advanced projects, our On Site Heat Technicians recommend switching to direct fired, indirect fired, or direct fired enclosed flame heaters.


On Site Heat Solutions

To sum up, stay ahead of any unwanted portable heater mistakes! Be informed how to properly operate your portable heater. For your convenience, we can provide you with the best temporary heating solutions. Want to make sure you are well informed and rent the right heater for you? Call us now at 800.210.8407 or request a quote online and an On Site representative will gladly reach out to you.

Read more

Winter Construction Success – 5 Must Haves

Winter Construction Success - 5 Must Haves

“There are two seasons in the Midwest, winter season and construction season”. We have all heard of this joke before! Yes, it would be ideal to complete all construction projects during the summer, but when your winter season lasts nearly 7 months, some Midwesterners are forced to work on their construction projects in extremely cold weather. It is still possible to have a successful construction project during the winter. Here are our 5 must haves to ensure winter construction success:


The Right Heater for Your Site

S1505 Direct Fired Heater On Site

Choosing the right heater for your job site can depend on different factors. To get started on gearing up your construction site for the winter, here are five types of heaters you could use to keep your job site and team warm during those working hours:

  1. Direct Fired Heaters – used at construction sites where efficiency is top priority. The job site must have enough clearance for placement.
  2. Indirect Fired Heaters – used at locations where safety is top priority. Often used at locations that have occupants.
  3. Direct Fired Enclosed Flame Heaters – used for job sites or special events where top priority is having easily duct-able heat.
  4. Electric Heaters – used for locations that have access to electricity and where non-combustible heat is required.
  5. Convection Heaters – used for construction sites with no available electricity or natural gas line.

Other Portable Heating Solutions to Consider for Winter Construction Success

E3000 Hydronic Ground Heater and Thawing Blankets on site

The biggest challenge when working at a construction site during the winter is probably curing concrete. Concrete tends to have a difficult time setting when temperatures are too low. You should consider using a ground thawing unit as well as thawing blankets to ensure that concrete cures without difficulty. Ground heaters thaw frozen ground, cure concrete, prevent frost, and provide temporary air heat for your job site. Pairing the unit with ground thaw blankets also allows to spread the heat around the area and make your construction project more productive.


Having Technical Support Available for Heater Malfunction

950H Direct Fired Heater On Site

If you’re making good use of heating equipment at your construction site, you might come across equipment malfunction. Do not fear! Typically, these malfunctions are a result of user errors. They are quick and easy fixes if you have the proper equipment. We strongly recommend checking out our Portable Heater Troubleshooting Guide on your own before calling for help. If you are still having issues, having Heat Technician assistance would be recommended to make sure you don’t fall behind on construction deadlines. At On Site, we have state of the art equipment and Heat Technicians that available to deliver, set up, and pick up up heaters. They are also available to assist in troubleshooting by phone or on site if needed. Customers should call 651-429-3781 to get in touch.


“Winter-Proof” Portable Restroom for Winter Construction Success

Construction Portable Restroom - Winter Construction

Preparing your portable restroom rental for winter constructions is also an important factor to consider. Portable restrooms are usually outdoors and exposed to the freezing temperatures. To best winterize your portable restrooms, make sure to include a portable restroom electric space heater when renting out a unit. At On Site, our Sanitation Technicians fill the portable restroom tanks with a methanol mixture to prevent the water and waste from freezing. Making sure job site workers can comfortably make use of a restroom can ensure productivity for your construction project.


A Safe Working Environment for Your Team

Construction Thawing Blankets set up

Employers must always make sure to comply with OSHA (Occupational Safety and Health Administration) standards to keep their employees safe in the workplace.  Personal protective equipment (PPE) can protect workers from most hazards, but workers must also consider hazards related to extreme cold weather. OSHA does not have specific safety requirements for winter constructions. However, they do provide guidelines that employers should follow to protect workers from the dangers of cold stress . Some of these guidelines include training workers on cold weather safety. Making sure they have the proper tools and gear for cold weather also keeps them safe.


The On Site Solution for Your Winter Construction Success

Don’t let the freezing temperatures scare you! Winter construction success is still possible if you make sure your job site is properly equipped. At On Site Companies, we can provide you with a wide selection of portable heaters and winterized portable restrooms for your job site. Not sure which heater is best for your project? Contact us for a personalized service from one of our representatives. You can also call us or request a quote today for the best heating and sanitation solutions!

Read more

Cold Weather Safety Requirements & OSHA

Cold Weather Safety Requirements & OSHA

The end of summer is the best time to set up construction sites for cold weather. The Occupational Health and Safety Administration (OSHA) keeps guidelines up to date to keep workers safe. Are there any cold weather safety requirements? OSHA has not set specific safety requirements for working in freezing environments. However, exposing workers to extremely cold weather for long periods of time could cause serious physical harm. This conflicts with OSHA regulations (Section A(a)(1) of the Occupational Safety and Health Act of 1970). Therefore, employers are accountable for the safety of their workers. OSHA advises the following four ways to keep employees out of harm’s way during dangerously cold workdays.


Training on Cold Weather Safety 

Workers should know how to recognize the effects of being exposed to freezing temperatures. This is why employers must train them on working through hazardous conditions. Some of these conditions might include slippery roads and gusty, cold winds. One of the worst dangers workers face in extreme cold weather is cold stress. Cold stress results in cold-related illnesses and injuries. Workers should also be trained on recognizing symptoms to prevent injuries or illnesses.


Proper Tools (engineering controls for cold weather)

To reduce the likelihood of cold stress, employers could set engineering controls in place. As an example, electric heaters could be used to keep the workplace warm and comfortable for employees. For the construction industry, there are many types of heaters available to successfully complete projects in cold weather. The use of these benefits workers and decreases their exposure to hazardous working conditions.


Work Practices for Cold Weather Safety 

Implementing work practices that ensure worker safety is crucial to preventing injuries and illnesses. OSHA advises employers to consider providing workers with the right equipment and protection from cold weather. Employers must also keep weather conditions in mind when sending them out and limit exposure time to very cold temperatures. They should be constantly monitoring weather conditions to ensure cold weather safety. Be sure to keep an eye on workers and provide them with warm liquids. This will ensure their well-being while on the job. Finally, it’s recommended to optimize the flow of communication. This is crucial in case of emergencies that may occur due to hazardous working conditions.


Proper Gear (warm clothing)

One of the top risk factors of cold stress is dressing improperly while working in cold weather. OSHA does not have specific requirements set for ordinary clothing besides personal protective equipment (PPE) when applicable. However, employers should still give workers winter weather gear to protect them from the dangers of cold stress. A few layers of wool or synthetic clothing would be a great. A hat capable of covering ears is a necessity. A knit mask for the face would also be helpful. Insulated and waterproof gloves will protect  hands from frostbite. Insulated boots are needed to protect the feet.


The On Site Solution

Even though OSHA does not have cold weather safety requirements, they do have guidelines for employers to use in the workplace. These guidelines would best prepare their workers who work in cold weather. At On Site Companies, we can provide a wide range of high quality portable heaters to keep your works safe through cold weather. These heaters would also keep your construction site operational and productive during winter season. Call us today or request a quote for the best temporary heating solutions.

Read more

How to Prepare Your Job Site for Spring

How to prepare your job site for Spring with portables

Being proactive is the best way to prepare your job site for the spring. We recommend that you do so as soon as possible to ensure that the right solutions will be available when you need it. Here are the top 5 must-haves for any job site as the weather begins to change.

1) Dehumidifiers

Whether it’s melting snow and ice from the winter or the April showers that bring May flowers, dehumidifiers are a must-have for your job site. Having dehumidifiers ready to go will keep that moisture away from your job site that makes it harder for your team to work.


2) Air Conditioners

When spring rolls around it’s time to put away the heaters and bring in the air conditioners. Having a cool job site will keep your employees safe and comfortable enough to work efficiently.


3) Air Filters

Having access to air filters to remove any harmful particles, odors, and chemicals that reach your job site is essential to keeping everyone safe. This is particularly important during wet spring months when mold and dust mites can accumulate if moisture isn’t addressed proactively.


4) Air Movers

Air movers such as prop fans, exhaust fans, and carpet blowers make a great addition to any job site. They increase the efficiency of the equipment discussed above by controlling the air flow and can also be used to help dry out any moist areas.


5) Portable Restrooms for Job Sites

Portable restrooms are essential to any job site to keep your team comfortable. Having employees use off site restrooms can be extremely expensive when you account for the increased time of restroom breaks. Standard restrooms are great, but mobile units, hook units, and high rise units are a game changer.


The On Site Solutions

On Site Companies has all of the above solutions help you prepare your job site for spring. It is never too early to begin planning for warmer weather. We recommend that our customers do so to ensure that we have the right solutions for you available when you need it. Call us today to discuss your needs – we would love to provide you with a quote specifically tailored to your job site.



Read more

How to Start Your Temporary Heating Plan

How To Start Your Temporary Heating Plan with trees and snow image

There are a lot of variables to consider when creating a temporary heating plan for the winter. By preparing accordingly, you can find an efficient heating solution that is cost effective and keeps everyone safe. Don’t know where to start? Don’t worry, we’ve got you covered.

What is your goal?

Defining your needs and determining what you are trying to accomplish will give you the foundation for a good heating plan. Are you just trying to keep everyone warm or is there another goal to keep in mind? Maybe you’re trying to thaw the ground or cure concrete. Different goals require different heaters – and sometimes a combination of different equipment.


What fuel source is available?

Not all heaters use the same fuel source. The last thing you want to do is spend a lot of time and effort into creating the perfect temporary heating solution only to find out in the end that the heaters you were planning to use require a fuel source that you don’t have available at the site.


What power is available?

Similarly to the topic of fuel source, different types of heaters require different types of power. Taking this into consideration before you start to browse for heaters will ultimately save you a lot of headache as opposed to neglecting to do so.


How many BTU’s do you need?

Determining the correct number of BTU’s needed for a project is essential to a successful temporary heating solution. In order to calculate the perfect number you will need to define the dimensions of the space, the preferred temperature of the inside, and the estimated temperature of the outside.


Not good at math? It’s okay – use our handy portable heat calculator. Just click the red calculator icon to the right of the webpage. Input all of the necessary data and you will be one step closer to creating the perfect plan!


The On Site Solutions

Having an industry expert on your side is ultimately the most cost effective and efficient route to go about creating a temporary heating plan. For over 30 years we have helped our community with their climate control needs. Check out our website for more information on our portable heaters. Call us today or request a quote below for the perfect temporary heating solution.

Read more

Top 5 Ways to Heat Up Your Construction Site

Top 5 Ways to Heat Up Your Construction Site copy and a construction site image

Cold weather isn’t going to stop your construction team. Heating up your job site can be a daunting task if you don’t know where to start! There are several ways to keep your team warm with portable heating solutions. Here’s five ways to heat up your construction site.

1) Direct Fired Heaters

Direct fired heaters will quickly heat large areas, while forcing moisture and contaminates out through pressurized methods. These heaters are perfect for use on your job site. All of these units burn 100% outside air.

2) Indirect Fired Heaters 

Indirect fired heaters will provide you with comfortable portable, temporary heat that is environmentally friendly and portable. Indirect Fired Heaters are an enclosed flame heat alternative that work by venting harmful combustion by-products outside, while also eliminating harmful contaminants and moisture from the air.

3) Direct Fired Enclosed Flame Heaters

Direct enclosed flame heaters are portable, quiet, and are easily moved from one area to another. With remote thermostats and security options, you can monitor the equipment usage and temperature control.

4) Electric Heaters 

Electric space heaters are designed to be used in small spaces where non-combustible heat sources are required. These units allow you to provide heat to your job site, without having to vent out fumes. This allows you to heat any area in a safe and efficient manner.

5) Convention Heaters

Convection heaters are perfect for use when you need temporary heating, but you do not have electricity or natural gas available for a fuel source. These units use vapor propane instead to produce direct fired heat.

Bonus: Ground Thaw Units

Utilizing units such as ground thaw heaters, heat exchangers, and ground thaw blankets is another great way to remove ice from the ground of your job site and keep it warm for your workers.

The On Site Solutions

On Site Companies has all of the above solutions to heat up your construction site. Here are all of our portable heaters for construction. It is never too early to begin planning for cold weather. We recommend that our customers do so to ensure that we have the right solutions for you available when you need it. Call us today to discuss your needs – we would love to provide you with a quote specifically tailored to your job site.

Read more

Preventing Silica Dust On Your Project

Everyone knows there are a lot of different safety hazards on a construction project. There are the obvious dangers with large machinery, sharp tools, and hazardous materials. But, have you ever stopped to consider the dust generated from the work? It’s true, silica dust can be a hazard. Don’t worry, though, we have the information you need to make sure you’re not just OSHA compliant but keeping your crew healthy.

What is silica dust and silicosis?

Silica is one of the most common minerals and occurs in many building materials including, but not limited to, sand, granite, masonry, and concrete. Dust is created by blasting, cutting, chipping, drilling, or grinding materials that contain silica. Silica dust is a very fine dust with particles invisible to the human eye. These dust particles are at least 100 times smaller than a grain of typical sand.

When ingested or inhaled, silica dust can lead to a variety of lung diseases including lung cancer. One of the most common lung diseases caused by silica dust is silicosis. Silicosis is the scarring of lung tissue over time due to exposure to silica dust. Silicosis harms the ability to breathe and causes cough, weight loss, tiredness, and chest pains.

There are three types of silicosis; acute, chronic, and accelerated silicosis. Acute silicosis usually occurs within a few weeks of exposure to silica dust. Chronic silicosis appears 10 to 30 years after exposure, and accelerated silicosis will occur within 10 years of high-level exposure to silica dust with symptoms occurring quickly.

There is no one specific treatment for silicosis. Cough medicine, bronchodilators, and oxygen can help treat symptoms of silicosis. Antibiotics are prescribed for respiratory infections caused by silicosis, but do not treat silicosis itself.

The best treatment for silicosis is preventative care and avoiding exposure to silica dust.

OSHA Regulations for Silica Dust

With the obvious health hazards posed by silica dust, OSHA (Occupational Safety and Health Administration) has passed a series of regulations to deal with silica dust. OSHA provides two different methods for dealing with silica dust on their website.

The first way to be OSHA compliant is by following a table in the official regulations on OSHA’s site. This table lists common equipment or tasks and then solutions for the task. Most of the solutions listed in the table come down to making sure the tool being used has a water delivery system to limit dust or include a dust collection system.

The second method OSHA provides to be compliant is by using a formula they provide to determine the amount of silica dust present and using the correct dust controls for the dust amounts. Dust control methods recommended by OSHA include respirators for workers and a time limit to dust exposure.

OSHA also requires a written exposure plan, adequate housekeeping practices, medical exams, worker training, and records of worker exposure to silica dust.

Dust Control Solutions

There are a lot of ways to deal with silica dust on your job site. Many of the saws and grinding tools used today have a moisture-based dust suppression system or a vacuum-based collection system. While these systems are good, they will never eliminate 100% of the dust.

A fantastic addition to the built-in dust solutions are portable air filters. Portable air filters have the advantage of giving you an air cleaning solution that moves with your project. They are especially effective for contractors doing remodeling or restoration work.

On Site has several varieties of portable air filters, based on the needs of your project. The majority of our portable air filters feature HEPA (high-efficiency particulate air) filters. HEPA filters are able remove 99.9% of small particles from the air. This makes these units a very effective companion to any built-in systems a tool may already have.

Even if you are working with a tool without a dust solution, HEPA air filters like the PH 1400 can dramatically improve the air quality of your project. Not only will these units filter out dangerous silica dust, but they also will help remove odors and fumes.

On Site Has Your Air Filtration Needs

When it comes to air quality, you can’t afford to cut corners. Besides the OSHA compliance needs, workers getting sick from silica dust can lead to work delays and project slow downs. Air quality impacts your bottom line.

Call On Site today at 800.210.8407 to talk to one of our air filtration experts. Our team will help you make sure you are OSHA compliant and keep your team working. You can see our entire line of portable air filters and request a custom quote now.

Don’t let silica dust hurt your business. You may not be able to see the dust particles, but you’ll be able to see the negative impact on your business if you don’t deal with it.

Read more

Handling Water Runoff with Containment Pans 

Winter snow melt. The rainy season. Any way you slice it, it’s the wet time of year, which can have a huge impact on your construction site. You need to be able to deal with that water in an environmentally safe and legal way. One of the biggest issues is making sure the storm water runoff is not contaminated by the waste water generated by your portable restrooms.


Read more

Porta Potties for Road Construction

As a professional working in the construction business, you know that having the proper facilities is crucial to supporting your employees’ hygiene and keeping them happy. This can be especially true when it comes to road construction sites, where you likely don’t have access to running water and flushing toilets. When you’re working on a road project, the last thing you want is to try to figure out where you’re going to use the restroom or to have to walk a mile only to have to wait in a long line. Knowing how many porta potties to provide at a road construction site is critical to the success of your project. If you don’t have enough, you run the risk of creating not only unsanitary situations, but an unhappy workplace.


Read more
Request a quote

Find the right rental for your job site or occasion by exploring available options and prices.

Request Quote