air handler

Air Conditioner Components | HVAC Cooling

Air Conditioner Components There are big differences between heat pumps and air conditioners. While the air conditioner provides cooling the heat pump will provide heating and cooling so the components inside the air conditioner differ from the components inside the heat pump system. I constantly get emails from people asking if they can convert their […]

Evaporator Coil for Heat Pumps & Air Conditioners | HVAC Refrigeration

Evaporator Coil for Heat Pumps & Air Conditioners – the evaporator is responsible for absorbing heat into the coils and the refrigerant. The evaporator is an essential component of vapor compression refrigeration. This is usually done as result of passing air or water over the evaporator coil where a heat exchange process takes place. Heat leaves […]

Fixing a Refrigerant Leak | Air Conditioner & Heat Pump Diagnosis & Repair

Fixing a Refrigerant Leak Fixing a Refrigerant Leak – You had the new air conditioner or heat pump system installed some years ago and suddenly it stopped heating or cooling properly so you call the HVAC contractor to check it out. The HVAC technician arrives and spends about thirty minutes HVAC troubleshooting and then he comes […]

Variable Speed ECM Blower Motors | HVAC Heating & Cooling Systems

ECM Variable Speed Blowers Variable Speed ECM Blower Motors – Variable speed blower motors have become increasingly popular in residential air conditioning and heating systems and for good reason; these motors increase efficiency of the systems and offer a whole range of other benefits that help the system and the consumer. We have many other related […]

Running New Thermostat Wire – New Installation

Running New Thermostat Wire Running New Thermostat Wire – It is possible that you may have to run a new thermostat wire from the air handler or furnace to the location where the existing thermostat is located. Running new thermostat wire can challenging even for professionals. If you must the follow will hopefully help you in […]

2011 Proposed Increase in SEER – EER – AFUE – HSPF

This article is archived for future records. Please refer to DOE website for reference on current energy efficiency guidelines.   10 SEER units cannot be purchased in the US any longer. The new standard as mandated by the Department of Energy as of January 2006 is 13 SEER. This 30 percent increase in efficiency from […]

Duct Work and High Ceilings | HVAC Duct Work Systems

Duct Work and High Ceilings | HVAC Duct Work Systems Duct Work and High Ceilings – I did not see any reference to my question and would appreciate a response as soon as possible, as due to medical situation, have to make a decision soon. We own an OLD house with 13′ ceilings in a large […]

Variable Air Volume Box with Hot Water Reheat | Commercial HVAC

Variable Air Volume Box with Hot Water Reheat Variable Air Volume Box with Hot Water Reheat – The variable air volume box or VAV box is a commercial solution to adding multiple zones to large buildings. VAV boxes offer zoning solutions so that separate zoning demands or temperature selections can be maintained in different areas of […]

Air Handler Equipment DDC Controllers | HVAC Control

Air Handler Equipment DDC Controllers | HVAC Control Air Handler Equipment DDC Controllers – These controllers will control an air handler once the wiring is completed. The panel is freshly mounted and waiting for the technician to run the piping and pull the wire from the control points. Other points, such as outside air, temperature sensors […]

How DDC Status Works – Methods and Types | HVAC Control

How DDC Status Works – DDC and Status – Is the Device On or Off The basics of DDC include learning about the status of a fan or a compressor or pump. How does a DDC controller read the status of the device it is monitoring? There are several ways to prove a device is running […]

HVAC Control and Direct Digital Controls 2 | DDC & BAS

HVAC Control and Direct Digital Controls – The (Field) Technical Aspects of Direct Digital Control A HVAC technician who knows nothing about HVAC control systems would wonder how these hvac control systems work. To understand hvac controls, one must understand basic electricity and circuits. Starting with a large commercial VAV air handling unit with three stages […]

The NEC and HVAC Chapter Two

The National Electrical Code (NEC) and HVAC: The Basics The NEC and HVAC Chapter Two The NEC and HVAC Chapter Two – Chapter Two of the National Electrical Code (NEC) covers Wiring and Protection and starts at Branch Circuits, Feeder circuits, GFCI requirements and protection,. An HVAC installer may want to pay attention to branch circuit […]

Find Tonnage on AHU | HVAC Equipment Nomenclature

Find Tonnage on AHU | Equipment Nomenclature How do I find out the tonnage on a AHU? The label/tag has faded all I have on file is the model number and the serial number, make. Question Posted By Francisco the Building Engineer on May 3, 2011 Refer to the manufacturers website for their HVAC nomenclature […]

Building Automation Systems | HVAC Control

Building Automation Systems | HVAC Control What you will learn from this article: 1) the efficiency and conveniences Building Automation Systems add to a building 2) how Building Automation enhances energy savings and troubleshooting problems 3) how allowing controllers to communicate with each other enhances HVAC and electrical systems 4) many of the benefits of […]

Preventive Maintenance Air Handlers | York AHU’s

 Preventive Maintenance Air Handlers | York AHU’s These air handlers provide air conditioning for a zoned VAV system. The air handler is an integral part of an air conditioner system. The air handler contains a blower, air filters, some coils (DX or chilled water), hot water coils (not all air handlers have heating coils in […]

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