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Hvac Systems Main Parts And Functions

Of all the different ways for people to heat and cool their homes, by far HVAC systems are the number one choice. This comes as no surprise because HVAC systems do their heating and cooling jobs very efficiently, are very easy to maintain and also are very simple top operate. It is an essential appliance that despite the fact its found in many homes, not many people really understand how they work. Here is an overview of the main parts found in HVAC systems and what role they play in the functioning of HVAC systems as a whole.

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1. Combustion Chamber

Of course one of the main functions of HVAC systems is the production of heat to warm a home or business; producing the heat for this job is the main function of the combustion chamber. Most forced air furnaces produce heat by means of a fossil fuel such as natural gas, propane or oil. The combustion chamber is made up of parts that bring in both the fuel source and air and then mix them together. Once these are mixed, they are then ignited by a small flame (pilot light) or a super-hot electric coil to start the mix on fire and in turn produce the heat that an HVAC system then distributes to the rooms in the structure.

2. Air Conditioning Component

It must be noted that not all HVAC systems have an air conditioning component. When they do it makes a convenient system that keeps a home or business very warm during the colder months of the year and much more comfortable and cool in the hot summer months too. The cool air that is produced by the system conveniently is distributed to the home or business by the same means that distribute the heat that the system produces.

3. Forced Air System

It was mentioned that the heat and cool air that HVAC systems produce needs to be distributed to the various places in a home or business that need it; this is the function of the forced air component of the system. The unit will have a large fan that brings the air into the system to not only move the warm and cool air but to also supply the air to the combustion chamber to help produce the flame. There are hundreds of feet of ductwork in the walls and floors of a structure that bring the heat or cool air to where it is needed.

4. Controls

No forced air furnace can work without the essential controls that tell the system how it needs to operate and what the desired temperature is for the structure that is being cooled or heated. Controls can be very simple and do such things as just turn the system on and off or the can be so sophisticated that they can heat and cool individual areas to different temperatures and control the exact time when the HVAC system comes on and off. Like any type of appliance, HVAC control technology has come a very long way over time.

HVAC systems are very essential to home comfort to say the least and there really is no better or easier way for a person to both heat and cool their home or business.

Legislation Affecting Planning In The Uk

UK planning law is a body of regulations that anyone who intends to build, modify, or develop property in the country will have to deal with. While the intricacies of the laws governing planning are extremely complicated, the following overview should prove to be enlightening.

The Goal Of Planning Permission

For more than 60 years -- since the adoption of the Town and Country Planning Act of 1947 -- the objective of the planning system has been to see that no land is built on, renovated, or developed without the approval of a qualified local planning authority. This planning authority or LPA usually takes the form of a borough, district, or city council.

Why would the government take on this challenging task? The goal of planning regulation has always been to balance the rights of the landowner against the needs of the community. Ideally, the system should provide much-needed regulatory oversight without compromising the development process. In practice, the system has shown itself to be somewhat flawed, mostly through an excess of bureaucracy that makes it difficult for landowners -- especially homeowners -- to secure planning permission.

How Permissions Are Secured

Planning permissions are issued in two tiers: A full permission and an outline permission. Both require the submission of accurate planning application maps in order for the project to be considered. As their names suggest, full permissions are complete authorizations to proceed with development while outline permissions are granted to proposals where the final design of the work to be done has not been finalized.

Most full planning permissions are subject to conditions. These are formal agreements between the developer and the LPA that the developer must meet in order to proceed. Conditions cover a wide range of issues from the appearance of new buildings to the noise generated by industrial works. Conditions are intended to make a development more amenable to the applicable regulations of the community; they are not supposed to be employed as a "quid pro quo" measure to make unpopular developments more palatable.

Complications To The Current System

As noted above, the performance of the current planning system leaves much to be desired, especially in terms of its swiftness. While steps have been taken to modernize many aspects of the planning process -- most submission and publication of planning documents occurs online now -- certain fundamental problems hold the LPAs back.

Given their mandate to address all proposed development of any scale, most LPAs are sorely pressed to meet their obligations with their limited resources. The last piece of legislation to alter planning significantly was the Localism Act of 2011. This abolished many regional planning bodies but also introduced planning oversight responsibilities to many authorities that had not previously exercised it.

The planning process in the UK is further complicated by sustainability concerns. All projects require a sustainability appraisal which includes a strategic environmental assessment. The SEA process satisfies several crucial EU regulatory requirements, but the way sustainability is handled varies widely from jurisdiction to jurisdiction.

In the UK, the planning process has evolved slowly over time to reflect the changing needs and interests of both government planners and private developers. While the current state of planning law is far from ideal, the possibility of improvement in the future is always open.