Mechanical

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 […]

Closing Off Part of the House To Save Energy on HVAC | HVAC Efficiency

Closing Off Part of the House To Save Energy on HVAC Closing Off Part of the House To Save Energy on HVAC – I have a Heil gas/electric package unit in my home. I, particularly, want to know, if I can close off a section to save on heating. Heating dealers have not been helpful as […]

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 Conditioning and Heating Sizing | HVAC Technical

Air Conditioning and Heating Sizing – How many tons of air conditioning and heating do I need per square foot? Rules of Thumb It is not uncommon for HVAC estimators or HVAC contractors to use various rudimentary techniques which are generally referred to as rules of thumb. Some will say on the low end you need […]

Types of Boilers | HVAC Heating and Cooling

There are many different types of boilers in the boiler room today in a variety of heating applications. There are two main categories of boilers among the different boilers and those two categories are steam boilers and hot water boilers. Either of those categories can be fueled by oil, gas, or electric (although electric is […]

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 […]

Rooftop Economizer CO2 | HVAC Control

Rooftop Economizer CO2 | HVAC Control This damper is part of a free cooling system for a rooftop economizer. It is part of an economizer damper system which allows free outside air cooling when the outside air temperature and humidity are ideal. This economizer also works on CO2 control so that if the CO2 levels […]

DDC Automated Logic M-Stack | HVAC Control

DDC Automated Logic M-Stack DDC Automated Logic M-Stack – This Automated Logic M-Stack provides control for multiple pieces of HVAC equipment and integrates network communication all in one single stack. This direct digital control system is integrated with pnuematic controls. DDC allows automated HVAC control processes to take place and adds higher efficiency to an HVAC […]

Hot Water Unit Heater Protecting a Mechanical Room

Hot Water Unit Heater Protecting a Mechanical Room Unit heaters are used in various places to protect equipment and provide comfort to occupants. This hot water unit heater provides protection for a mechanical room where there is a large air handler and other associated equipment in the mechanical room. This system is controlled by DDC. A […]

Ceiling Fan in a Garage | HVAC Airflow

Ceiling Fan in a Garage | HVAC Airflow This ceiling fan keeps the air moving in a large garage where repairs are made to heavy machinery. In addition to providing a level of comfort by keeping the air moving in the shop the ceiling fan also helps to keep noxious fumes at higher elevations and […]

Infrared Radiant Heating Systems | Garage Heaters

Infrared Radiant Heating Systems | Garage Heaters Infrared Radiant Heating systems provide comfortable heat in larger areas and spaces such as garages, warehouses, and other open spaces where other types of heating systems are not practical or efficient. Infrared radiant heat works through thermal radiation transmitting heat to large objects including floors and walls. These […]

Types of HVAC Thermostats | HVAC Control

Types of HVAC Thermostats  – There are many different types of thermostats. Thermostats also have various levels of complexity. Below is a list of the basic thermostat types. As we have time we will update the list to make sure it is as comprehensive as possible. Non-Programmable Mechanical Thermostats – Many of these thermostats are the […]

What Happens When My Boiler is Flooded

What Happens When My Boiler is Flooded Richard, What Happens When My Boiler is Flooded – Hurricane Irene was a disaster for us as we live in a Northern state that was hit by flooding from the rain of Hurricane Irene. As a result of the loss of power and the flooding our basement was […]

DDC Outside Air Economizer System | HVAC Control

DDC Outside Air Economizer System DDC Outside Air Economizer System  – Outside louvers allow the DDC control system to open dampers and introduce fresh air into the building. Building automation system, or the energy management system as it is sometimes called, monitors outside air temperature and humidity and based on a calculation and opens the outside […]

Condensing Units | Heating and Cooling

HVAC Condensing Units Air Conditioning and heating equipment uses high voltage. Caution is always advised when working around high voltage. When in doubt call a professional. Safety First!! What you will learn from this article: 1) Basic description of a condensing unit 2) The differences between a heat pump condensing unit and an air conditioner […]

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