Home Guides Home Home Improvement Sustainability Do You Need Two A/C Units for a Two-Story Home? Email Reddit Two A/C units aren't always necessary for a two-story home. A single A/C unit in a two-story home often produces no-win situations. Crank the thermostat down to offset the natural warming in upstairs living spaces and it’s too chilly downstairs. Make the downstairs comfortable and it’s too hot in the upstairs bedrooms. Installing two separate A/C units dedicated to each level is one answer. It’s also an expensive installation and consumes more energy, boosting operating costs. Two alternatives exist to dual systems that may enable you to live with one central air conditioner. Reduce Upstairs Heat Gain A lower cooling load in upstairs living spaces allows more moderate A/C thermostat settings and avoids over-cooling downstairs rooms. During the summer, heat energy accumulating in the attic can raise temperatures up to 150 degrees Fahrenheit. This acute heat conducts through the ceiling into upstairs rooms, offsetting the effect of air conditioning and requiring lower thermostat settings than the rest of the house.

Attic fans that exhaust heat and upgraded insulation in the attic floor can reduce attic heat accumulation and keep upstairs rooms cooler without lowering the thermostat. Install A Zoning System Zoning divides a single HVAC system into separate cooling zones controlled by independent thermostats. Motorized dampers in the ductwork respond to signals from a central controller to direct cool air to one zone in response to a dedicated thermostat, while simultaneously shutting down or decreasing airflow to another zone that doesn’t require as much cooling. Zone dampers open and close independently of one another. This enables a single air conditioner to maintain different temperatures in upstairs and downstairs zones. References Alternative Energy eMagazine: HVAC Zoning ControlsCalifornia Energy Commission: Residential Zoned Ducted HVAC Systems PDFEnergyStar.gov: About Attic Ventilation Photo Credits Comstock/Comstock/Getty Images Suggest a Correction How to Sell a Condo in a Tough Market Selling a condo in a tough market is something that ...

How to Make Your Dream Home a Reality The first thing you want to do when looking for your ... Does the Seller Have to Sign a Counter Offer? The seller is never obligated to sell a piece of real ... Things That Affect Housing Prices There are a large number of things that affect housing ...air conditioner window unit installationHow do I get even temps in my 2 story house?on wall ac units July 22, 2007   Subscribeair conditioning package units sale How can I make air conditioning work better in a 2 story house? A young man configures a Wikimedia server in a Kennisnet server room. A server room is a room, usually air-conditioned, devoted to the continuous operation of computer servers. An entire building or station devoted to this purpose is a data center.

The computers in a server rooms are usually headless systems that can be operated remotely via KVM switch or remote administration software, such as Secure Shell (ssh), VNC, and remote desktop. Climate is one of the factors that affects the energy consumption and environmental impact of a server room. In areas where climate favors cooling and an abundance of renewable electricity, the environmental effects will be more moderate. Thus countries with favorable conditions, such as: Canada,[6] Finland,[7] Sweden,[8] and Switzerland,[9] are trying to attract more companies to site their server rooms there. A Kennisnet server room in Amsterdam The open door exposes the 19-inch racks to be used by Wikimedia servers. A 19-inch rack with patch cables, but no computer. Building a server or computer room requires detailed attention to six main design considerations: [10] Computer or server room location is the first consideration, even before considering the layout of the room’s contents.

Most designers agree that, where possible, the computer room should not be built where one of its walls is an exterior wall of the building. Exterior walls can often be quite damp and can contain water pipes that could burst and drench the equipment. Avoiding exterior windows means avoiding a security risk, and breakages. Avoiding both the top floors and basements means avoiding flooding, and leaks in the case of roofs. If a centralized computer room is not feasible, server closets on each floor may be an option. This is where computer, network and phone equipment are housed in closets and each closet is stacked above each other on the floor that they service. In addition to the hazards of exterior walls, designers need to evaluate any potential sources of interference in proximity to the computer room. Designing such a room means keeping clear or radio transmitters, and electrical interference from power plants or lift rooms, etc. Other physical design considerations range from room size, door sizes and access ramps (to get equipment in and out) to cable organization, physical security and maintenance access.

Computer equipment generates heat, and is sensitive to heat, humidity, and dust, but also the need for very high resilience and failover requirements. Maintaining a stable temperature and humidity within tight tolerances is critical to IT system reliability. In most server rooms "close control air conditioning" systems, also known as PAC (precision air conditioning) systems, are installed. These systems control temperature, humidity and particle filtration within tight tolerances 24 hours a day and can be remotely monitored. They can have built-in automatic alerts when conditions within the server room move outside defined tolerances. Air conditioning designs for most computer or server rooms will vary depending on various design considerations, but they are generally one of two types: "up-flow" and "down-flow" configurations. This type of air conditioning draws air into the front of the air handler unit (AHU), cools the air over the heat exchanger, then distributes the cooled air out through the top or through duct work.

This air conditioning configuration is well suited to retro-fitted computer rooms when raised floors are either of inadequate depth or do not exist at all. Typically, this type of air conditioning unit draws the air into the top of the air handling unit, cools the air over the heat exchanger, then distributes the air out of the bottom into the floor void. This conditioned air is then discharged into the server room via strategically placed floor grilles and onwards to equipment racks. These systems are well suited to new office buildings where the design can encompass raised floors suitable for ducting to computer racks. The fire protection system's main goal should be to detect and alert of fire in the early stages, then bring fire under control without disrupting the flow of business and without threatening the personnel in the facility. Server room fire suppression technology has been around for as long as there have been server rooms. Traditionally, most computer rooms used Halon gas, but this has been shown to be environmentally unfriendly (ozone depleting) and unsafe for humans.

Modern computer rooms use combinations of inert gases such as Nitrogen, Argon and CO2. Other solutions include clean chemical agents such as FM200 and also hypoxic air solutions that keep oxygen levels down. To prevent fires from spreading due to data cable and cord heat generation, organizations have also used those that are coated with FEP tubing. This plastic reduces heat generation and safeguards material metal efficiently. The demands of server rooms are constantly changing as organizations evolve and grow and as technology changes. An essential part of computer room design is future proofing so that new requirements can be accommodated with minimal effort. As computing requirements grow, so will a server room's power and cooling requirements. As a rough guide, for every additional 100 kW of equipment installed, a further 30 kW of energy is required to cool it. As a result, air conditioning designs will need to have scalability designed in from the outset. The choice of racks in a server room is usually the prime factor when determining space.

Many organisations use telco racks or enclosed cabinets to make the most of the space they have. Today, with servers that are one-rack-unit (1U) high and new blade servers, a single 19- or 23-inch rack can accommodate anywhere from 42 to hundreds of servers. If the computer systems in a server room are mission critical, removing single points of failure and common-mode failures may be of high importance.[12] The level of desired redundancy is determined by factors such as whether the organisation can tolerate interruption whilst failover systems are activated, or must they be seamless without any business impacts. Other than computer hardware redundancy, the main consideration here is the provisioning of failover power supplies and cooling. ^ Learnthat - server room Definition ^ Free Online Encyclopedia - server room ^ - lights out server room ^ TechRepublic - What not to do in a server room ^ CNET Networks - Photos: Server room cabling overhaul ^ Canada Called Prime Real Estate for Massive Data Computers - Globe & Mail Retrieved June 29, 2011.