Omnia Mechanical Group

571 Timpson Place Bronx, NY 10455

Phone: 212-534-2500

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What Are the Types of Commercial Boilers and Which One Is Best for Your Property?

Is it time for a new boiler in a New York City property you own or manage? If so, you may be confused by the different types of commercial boilers and the wide variety of models available, especially if it’s been decades since your last boiler was installed. Here’s a look at the two main types of boilers, along with a third option if you want to consider separating hot water production from your main boiler system.

Sectional Boilers

Ideal for smaller spaces

You may have heard this type of boiler referred to as a “pork chop boiler,” as it is made up of sections that resemble old-fashioned metal radiators still used in New York City buildings today. These segments are typically made of cast iron and attached to each other by gaskets. Users can expand the boiler size by adding more sections as needed.

Even though sectional boilers have limits to their pressure (15 psi for steam, 160 psi for hot water) and limits to their temperature (roughly 250 degrees Fahrenheit), they can handle an enormous output range: 35,000 to 14 million BTUs per hour.

There are other advantages to sectional boilers too:

  • This type of boiler is more compact than a tube boiler (see below), which makes it perfect for a limited boiler room footprint.
  • Installation is simpler, as the boiler is assembled on-site.
  • If your demand increases, or if you renovate and add more space, the boiler can be expanded to accommodate the new requirements.
  • As long as you treat your boiler water to the proper pH, sectional boilers are resistant to corrosion, which reduces leaks, interior damage, and other factors that reduce the boiler’s lifespan.

Tube Boilers

High output

Tube boilers, as the name implies, are constructed with metal tubes inside the boiler. The tubes heat up, thereby heating the water in the tank to produce steam for radiator heat or hot water for bathing, cleaning, laundry, etc.

Fire-tube boilers, one subtype of the tube boiler, are more common in residential settings and can be used for both heat and hot water. Hot gasses in the tubes heat water in the tank via the process of thermal conduction.

Less expensive than other boilers to maintain or replace, fire-tube boilers have an even larger output than sectional boilers: 500,000 to 75 million BTUs per hour.

The other subtype, water-tube boilers, are used more commonly in large physical plants, such as those on hospital and university campuses, and industrial settings. In this kind of boiler, water passes through the tubes to heat the tank water.

Although they are more expensive to repair, water-tube boilers use less fuel than fire-tube boilers. They also take up less space. On the downside, they are most subject to corrosion of the boilers described here, as well as clogging from graphite particles, which is known as graphitization.

Coil Boilers

On-demand hot water

When replacing an old boiler, it’s the perfect time to decide whether you want to keep your hot water production in the boiler room along with steam heat. On-demand hot water from coil boilers (not to be confused with tube boilers) is popular today for several reasons:

  • You save money and conserve energy, since water is only heated when it’s needed, not any time the boiler temperature drops below a certain point.
  • There’s no need to run a boiler all year, once the need for steam heat is over in the warmer weather or if your building uses electric heat.
  • On-demand hot water heaters take up less space than one giant hot water boiler or multiple old-fashioned hot water heaters.
  • You can place on-demand hot water units nearly anywhere, whether adjacent to each condo or clustered together in a convenient location.
  • When the on-demand hot water heater is set up properly, users shouldn’t run out of hot water, as there’s an endless supply.

How do these “tankless” water heaters work? When a hot water faucet is turned on, coils inside a small tank, usually mounted vertically to a wall, heat up rapidly to provide hot water.

On-demand water heaters may be right for your building if:

  • Your boiler room is cramped, and you want more space for your heating equipment only.
  • You have a lot of trouble operating or maintaining a traditional commercial hot water boiler and would like something less complicated.
  • You find your building running out of hot water during peak demand times, when the boiler can’t keep up.
  • You don’t want to worry about heat loss between the hot water source and units (by placing an on-demand unit in or next to each unit).
  • You and/or occupants are finding fuel bills exorbitant and want to cut costs.
  • You’ve crunched the numbers and installing on-demand heaters will be less expensive than replacing your hot water boiler.

If your boiler needs replacement, if you want to discuss the possibility of on-demand hot water, or if you want to extend your building’s boiler system lifespan with timely professional maintenance, Calray Boilers are the experts to call. You can reach us at 212-722-5506 to schedule an appointment, and we’ll make sure your hot water needs are met, no matter what size the property is.

Our Privacy Policy

Omnia Mechanical Group(the “Company”) strives to ensure the highest standards for property listings and customer information privacy. Please review the following statement to learn about our company practices and policies. Please be aware that our Privacy Policy is subject to change at any time.

1. Purpose.

This Privacy Policy (“the Policy”) provides information on how the Company uses your personal information. By agreeing to the Policy, you agree to our collection and use of your personal information as described in the Policy. This Privacy Policy is effective for all new users of

2. Personal Information.

You can browse some areas of (“the Website”) without being a registered user. However, certain activities do require registration. (You consent to the transfer and storage of your information by registering with

3. Use of Information.

Our primary purpose in collecting personal information is to provide you with a safe and user-friendly experience. For example, the Company may use your personal information to:

  • Improve our services and the Website’s content and layout;
  • Provide the services and necessary customer support you request;
  • Resolve disputes, collect fees, and troubleshoot problems;
  • Track and record customer satisfaction with our services;
  • Protect the Company against error and fraud;
  • Inform you of special promotions and announcements;
  • Enforce our agreements, terms, conditions, and policies; and
  • As otherwise described to you at the time of collection.

We may occasionally ask you to complete optional surveys. These surveys are used to improve and customize your experience with

The Company always provides you the ability to opt-out of further communication such as promotions and surveys; see the Opt-Out section below.

The Company does not share any of your personal information with outside organizations, companies, individuals, etc. The only exception to this standard is if such a disclosure is reasonably necessary to respond to any and all legal processes.

4. Links to Other Sites.

The Website may have links to other websites that may collect personally identifiable information about you. The Company is not responsible for the privacy practices of the content of those linked websites.

5. Safety & Security Precautions.

The Website has strict security measures in place to protect you and your information from fraud. Once your information is provided to Omnia Mechanical Group, we strive to ensure the confidentiality of your identity and information.

6. Opt-Out.

The Company provides you with the opportunity to opt-out of receiving promotional and other non-essential, marketing-related communications from Omnia Mechanical Group. If you would like to opt-out of these select communications, please see any of the Company’s email communications and follow the directions indicated.

7. Account Protection.

Your password ensures the security of your account. When choosing a password, the Company suggests using various characters. It is highly recommended that you do not disclose your password to anyone. (If you do disclose your password or your personal information with others, you are responsible for all actions taken in the name of your account.) If the security of your password is compromised for any reason, please contact the Company immediately.

8. Accuracy of Information

The Company does not guarantee the accuracy of information for any and all of its properties on the Website, and is not responsible for any errors or misrepresentations (made by Renters, the Client, or otherwise).

9. Cookies

The Company may place a small cookie on your computer’s hard drive. This allows us to personalize your use on the Website. In order to maximize the functionality and usability of the Website, you must set your browser’s preferences to allow both permanent and temporary cookies.

10. Changing Your Personal Information.

Should your personal information change, please immediately update your information on the Website. This will ensure the accuracy of our records. The Company does retain personal information from closed accounts in order to comply with law and collect and disburse any fees owed.

11. Third Parties

This Privacy Policy addresses only the use of information we collect from you. Since does not control the privacy policies of third parties, you are subject to the privacy policies of those third parties. It is advisable that you consult with the management of third parties before you disclose your personal information to others.

12. General

We may amend this Privacy Policy at any time by posting the amended terms on the Website. All amended terms are immediately effective after they are initially posted on the Website.

13. Privacy Policy Questions & Concerns

Questions and/or concerns regarding the Policy should be emailed to the following email address: