HVAC Installations & Project Management

We offer commercial HVAC sales and installation for both new and retrofit construction, providing a range of systems to fit all budgets. Over the course of our more than thirty years in business, we have installed quality commercial HVAC systems in office buildings, strip malls, churches, banks, car dealerships, restaurants, light industrial commercial spaces and more.

We perform HVAC installations of any scale, from one server room to an entire building. Our engineering and design experts will evaluate the needs specific to your building and efficiency desires and will customize a system that will be cost effective over the life of the unit. Once the design is approved, equipment selected and options finalized, our team will oversee your project so that we exceed your expectations and ensure your complete satisfaction.

Our commercial clients get the benefit of an expert installation backed by a full service HVAC company; AB Chelini provides excellent maintenance, service, repairs, parts, energy management and more.

What is the scope of work that we perform?

• Air Conditioning Systems
• Air Handlers
• Boilers & Water Heaters
• Building Automation Systems
• Chillers
• Cooling Towers
• Commissioning
• Design/Build Services
• Duct Systems
• Ductless Systems
• Energy Recovery Systems
• Furnaces
• Heating Systems
• Heat Pumps
• Humidifiers
• Mission Critical Systems
• Piping Systems
• Pumps
• Replacements
• Retrofits
• Supplemental Systems
• Tenant fit-outs
• Temperature Controls
• Variable Speed Drives
• Ventilation & Exhaust System

When do you need to replace or upgrade?

Although maintaining equipment is paramount to extending the life and efficiency of your systems, over time equipment will lose efficiency and significantly drive up operating costs.  A.B. Chelini’s team of experts will come in and evaluate and make recommendations to determine when chasing good money after bad becomes inevitable.  Once your system starts producing higher energy costs, too many breakdowns we will give you a comprehensive evaluation so you can best determine whether it is more cost effective to upgrade or replace your system.

Are there commercial rebates?

Yes, whether through the manufactures or local programs A.B. Chelini works hand in hand with our commercial clients to find all opportunities for rebates and savings that are available.

Service & Repair

When you manage or own a commercial building, an HVAC system failure can pose a huge risk and inconvenience to your business, tenants and occupants. In the summer, it won’t take long for the scorching outdoor temperatures to reach your interior spaces, and in the winter, the cold temperatures outside will quickly make the building chilled and uncomfortable.

Our expert, factory-trained technicians arrive in company uniforms with fully equipped service trucks to complete any needed repairs expertly and efficiently so your system is up and functioning properly. Our technicians have quick access to a large local parts inventory, ensuring timely repairs even when special parts are needed.

When is the best time to service our systems?

This is a challenging question to answer in general terms because every building is different and has different circumstances that govern it.  Simple service, filter changes, grease, belts and basic cleaning should be done once a month.  All service should be done when it affects the least amount of people on the property.  Major service should be done in off-season with a pre-planned strategy to repair or replace worn parts so that we maximize operational efficiencies and comfort for the occupants.  The best way to control this is by scheduled preventive maintenance check ups so you are not thrown into an emergency situation that can not be a controlled, planned fix.

What happens if our system breaks down after hours?

If your HVAC system breaks or stops working properly, you don’t want to lose valuable time getting the system back up and running. We respond quickly to all service calls, including after hours emergencies. One of our Comfort Specialist Managers answers our after hours phone so you never have to wait to get help or service.

System Issues -- Refrigerant

There are a multitude of problems that can arise on a commercial air conditioner as in any other HVAC system, but the problems are magnified by the size of the equipment and the size of the problems.  A refrigerant leak is one of the most common problems that occur in both residential and commercial systems.  If the refrigerant’s line, which is usually copper, becomes pitted to corrosion over time it will result in pinhole leaks that slowly drains the refrigerant that is needed for the system to operate.  If the leak goes undetected, the entire system can drain down leaving the unit out of commission.

System Issues – Air Handler

The air handler is the component that is responsible for the circulation of the air throughout the building.  The air handler motor houses lubricated bearings that lessen the friction on the motor while it is operating.  When the bearings wear down the friction on the motor increases and over time will burn itself out causing the system to break down.

Service & Repair

When you manage or own a commercial building, an HVAC system failure can pose a huge risk and inconvenience to your business, tenants and occupants. In the summer, it won’t take long for the scorching outdoor temperatures to reach your interior spaces, and in the winter, the cold temperatures outside will quickly make the building chilled and uncomfortable.

Our expert, factory-trained technicians arrive in company uniforms with fully equipped service trucks to complete any needed repairs expertly and efficiently so your system is up and functioning properly. Our technicians have quick access to a large local parts inventory, ensuring timely repairs even when special parts are needed.

When is the best time to service our systems?

This is a challenging question to answer in general terms because every building is different and has different circumstances that govern it.  Simple service, filter changes, grease, belts and basic cleaning should be done once a month.  All service should be done when it affects the least amount of people on the property.  Major service should be done in off-season with a pre-planned strategy to repair or replace worn parts so that we maximize operational efficiencies and comfort for the occupants.  The best way to control this is by scheduled preventive maintenance check ups so you are not thrown into an emergency situation that can not be a controlled, planned fix.

What happens if our system breaks down after hours?

If your HVAC system breaks or stops working properly, you don’t want to lose valuable time getting the system back up and running. We respond quickly to all service calls, including after hours emergencies. One of our Comfort Specialist Managers answers our after hours phone so you never have to wait to get help or service.

System Issues -- Refrigerant

There are a multitude of problems that can arise on a commercial air conditioner as in any other HVAC system, but the problems are magnified by the size of the equipment and the size of the problems.  A refrigerant leak is one of the most common problems that occur in both residential and commercial systems.  If the refrigerant’s line, which is usually copper, becomes pitted to corrosion over time it will result in pinhole leaks that slowly drains the refrigerant that is needed for the system to operate.  If the leak goes undetected, the entire system can drain down leaving the unit out of commission.

System Issues – Air Handler

The air handler is the component that is responsible for the circulation of the air throughout the building.  The air handler motor houses lubricated bearings that lessen the friction on the motor while it is operating.  When the bearings wear down the friction on the motor increases and over time will burn itself out causing the system to break down.

Peace Of Mind Preventive Maintenance Plan

A.B. Chelini recognizes that maintenance is an investment. This investment will help to eliminate surprise repair bills, keep your energy costs in check by enabling your system to run efficiently, and will extend the life of your heating and cooling units.

Whether you are managing a commercial office space, industrial/warehouse or owner-occupied building, health care facility, veterinary hospital or boarding facility, data center, or a retail or government facility, you can count on our experienced technicians to perform regular maintenance on your mechanical systems to protect your capital investment.

A.B. Chelini’s commercial HVAC maintenance plan features automatically scheduled appointments for periodic tune-ups. We give you a 10% discount off the regular price for each maintenance visit, and you also receive priority scheduling for HVAC emergencies; you go right to the front of the line for our 24 hours a day, seven days a week emergency service.

What is included in a quarterly Commercial Preventive Maintenance?

Each preventive maintenance contract is designed and engineered for your specific building or space. Standard options include but are not limited to the following options:

Spring Maintenance & Start Up
• Clean all condenser coils with chemical cleaner and hoses
• Clean evaporators-brush and wipe down
• Clean condensate drain pans
• Change air filters and fan belts on all rooftop units
• Lube all fan bearings and motor bearings
• Perform an operational checkout of cooling modes as per inspection sheet
• Check electrical components

Mid-Summer Air Conditioning Check-Up
• Change all air filters
• Check operation of all HVAC Units
• Check the exhaust fans
• Change belts as necessary

Fall Maintenance & Start up
• Change all air filters
• Inspect belts On all HVAC Units,
• Check operation of economizer on all HVAC units
• Check operation heating sections on all HVAC units
• Check electrical components

Mid-Winter Heating Check-Up
• Change all air filters
• Check belts on all HVAC units,
• Check operation of all HVAC Units.
• Check HVAC exhaust fan.

What is included in the Monthly Preventive Maintenance?

The 12 Month/12 Visit Preventative Maintenance program is designed and engineered for your specific building or space. Each preventative maintenance plan is priced according to the number and types of equipment at your property. Please call us at 301-924-3500 for complete details and pricing.

• Complete operational inspection of air-conditioning and heating systems
• Systematic check on the controls
• Routine air filter and belt changes
• Clean condensate drains
• Clean evaporator and condenser coils
• Lubricate motors and blower assemblies

How do I set up a preventive maintenance plan for our building?

The first step is to establish what needs to be included in the plan by taking an inventory of the equipment.  Next, establish what, if any, the manufacturers recommendations are and then break the plan into a 12-month calendar.  Meeting those requirements while keeping in mind year round and seasonal use concerns is something that we are cognizant of and will help you determine what should be performed and when.

Maintenance Details and Terminology of work performed

Air Filters – Must be replaced on a routine basis, while maintaining good air quality and proper airflow.

Evaporator Coils – Although air filters catch particles, they are not 100% effective; therefore the evaporator coils must be cleaned periodically, keeping efficiency at its best.

Condenser Coils – This coil is subjected to the outdoors and requires yearly cleaning to keep its heat exchanging capabilities at its best. A dirty condenser coil can cause high running pressures, high amperage use on the compressor and ultimately equipment failure.

Belts – A bad belt is not one that is necessarily cracked, but a worn belt reduces its grabbing ability as well. Also belts must be periodically tightened and checked to get maximum airflow.

Lubrication – Many motors and bearings are considered “permanently sealed”, however many require routine lubrication preventing pre-mature bearing failure.

Condensate Drains – A plugged condensate drain means water problems. It causes condensate drain to overflow and water usually finds its way into the building.

Electrical System Components – Inspect all electrical contactors, switches, relays, controls, amp draws, and compressors. Document all findings.

General Observations – Overview of unit, tighten up loose components-caused by normal unit vibration, check control section.

Energy Management

With AB Chelini’s advanced off-site energy monitoring technology, we can keep track of your energy use and the status of your system between service visits. We make sure your system is consistently performing at its best, and warning codes alert us immediately of any problems. This allows us to stay ahead of breakdowns and other major problems, preventing costly repairs and/or replacement. It also helps keep your energy bills lower, extends the life of your system, and ensures the productivity of your employees.

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Mini Split System

WHAT IS A DIAMOND CONTRACTOR?

Our MEUS Diamond Contractors are independent dealers with the highest level of accreditation, training, and hands-on expertise who have invested time to professionally develop their craft at one of Mitsubishi Electric’s approved training centers.

The only way that you can be certain of full warranty protection and unmatched performance is by purchasing your Mitsubishi Electric product from an authorized dealer.

Mitsubishi Electric Cooling & Heating has selected the finest HVAC distributors in the industry to carry these products and, working with them, we have assembled the best and most knowledgeable HVAC contractors (our Diamond Contractors) to provide you with the finest sales, installation, and service support possible.

We have spent millions putting this team in place to serve you and we highly recommend that you call upon this network as your best and most reliable source for Mitsubishi Electric’s high quality and reliable split-ductless products.

How long have ductless systems been around?

Ductless heating and cooling systems were developed in Japan in the 1970s and have since become a preferred heating and cooling system throughout Asia and much of Europe. In the United States, ductless systems have been used in commercial applications for over 20 years.

What is a duct-free split system?

A duct-free split system is a reconfiguration of a conventional central air conditioner. The split system consists of three basic mechanisms:

• An outdoor inverter-driven compressor or condenser unit
• One or more indoor evaporator units
• A compact conduit for refrigerant piping and wiring which connects the units. This design allows for energy conservation by targeting only those areas that need cooling or heating.

What is inverter technology?

Inverter technology is one that can vary the compressor, the condenser and the indoor fan speeds, which eliminates the need for constant compressor start-ups and shutdowns that traditional systems require to maintain a specific temperature.

The unique attributes of this type of system is that it can adjust the capacity and cooling output to provide only the amount of cooling that is needed at a given time. For example if you have an 18,000 btu system and all you need is 15,500 it will operate on the lesser btu making the unit more efficient.

What’s the advantage of Inverter Technology?

Inverter variable-speed outdoor units are measurably quieter and use less energy than conventional air conditioners. Central air conditioners may encounter energy losses up to 30% as the air travels through the ducts. Unlike conventional air conditioners that cycle on and off, an Inverter compressor ramps up or down to match the capacity and maintain comfort levels. Once the duct-free split system satisfies room temperature, the inverter compressor and smart electronics take over and your system will “coast along” as a car will coast downhill using less gas. It is the ability to control the temperature in any room with custom zoning rather than heating and cooling the entire house that aides in the unit being more energy efficient and thus more cost effective on utilities.

Why are ductless systems efficient?

Ductless systems are highly efficient, using 25 to 50 percent less energy than zonal heat types, such as baseboard, wall and ceiling heat or electric forced-air furnaces. Three key factors account for the high efficiency of a ductless system:

1. Ductless systems allow the user to control each heating and cooling zone independently, eliminating the costly overheating and over-cooling common to central air systems. You no longer need to pay to heat or cool unoccupied rooms.

2. While central air systems lose as much as 30 percent of their efficiency through air leaks and conduction in the ductwork, ductless systems distribute air directly to each zone, resulting in 25 percent greater efficiency. Ductless systems use inverter-driven, variable speed compressors that allow the system to maintain constant indoor temperatures by running continuously at higher or lower speeds. Thus, the system can ramp-up or down without great losses in operating efficiency, avoiding the energy intensive on/off cycling common in electric heating systems.

3. Modern ductless systems have extremely good Seasonal Energy Efficiency Ratios, or SEER, between 16 and 22, and Heating Seasonal Performance Factors, or HSPF, that range from 9 to 12 or greater.

How big is Mitsubishi’s new M-series outdoor unit?

Mr. Slim’s outdoor unit is not bulky like the conventional style units you are used to seeing. The unit’s very thin profile allows it to be mounted discreetly along the back or side of the home. Because the height is minimal, a small planting of shrubbery will also keep it from plain view for a more pleasing appeal.