Indirect Warm Heating

Indirect Warm Air Heating

The pipe work in heating systems incorporating a pressurisation unit has no openings to the outside air. It is sealed. A pressure sensor is fitted into the system. If the pressure falls too low a pump is operated that feeds
mains water into the pipe work. When the boiler fires pressure in the system will increase due to the expansion of water. This increased water volume is accommodated in the expansion tank. The tank is partially
filled with nitrogen which is compressed by the incoming water. If, due to a boiler control fault, the pressure increase is too great then an interlock between the pressurisation unit and boilers will switch the boilers off
until the cause of the fault can be corrected. Excess pressure is released by allowing water to escape through the pressure release valve. Continuous filling of the system by the pump would signal a leak in the


Air can be used as a heat transfer medium in the same way that water is used to carry heat. The warm air is delivered to the space to be heated in ducts rather than pipes. Air has a much lower heat carrying capacity
than water and so ducts need to be bigger in cross sectional area than a water pipe to carry the same amount of heat. The space required for these ducts must be allowed for in the structure of the building. There are three benefits of warm air heating. The first is that ventilation can be supplied to a room along with the heat. The second is that the time taken to warm up rooms to comfort temperatures is less than that taken by a wet system and finally the room warm air outlet terminals take up much less wall space than a radiator.

The main components of a domestic indirect warm air heating system. A centrifugal fan is used to pass air over a surface which is heated by a gas burner. This air is then delivered to the various rooms using ducts. The vertical ducts are sited centrally in the building to achieve economy of duct lengths and ease of accommodating them. Short horizontal runs deliver the air to each room. The outlet grilles should be directed towards external walls to counteract the cold down draughts which occur at windows. Air typically returns to the heater via the stairwell and halls. Gaps are usually created in doors to allow the free passage of return air. Air can also return to the heater via ducting. Return inlet grilles should not be sited in toilets or bathrooms due to the risk of re circulating moisture and odours throughout the building. Fresh air enters via infiltration routes into the building.


Types of central heating system

There is a variety of different methods of domestic central heating, including: CC electric storage heaters CC warm-air heating CC underfloor heating (radiant heating) CC water-filled radiators. Water-filled radiators are by far the most common system and therefore will be the main focus. Of the others: CC electric storage heaters use cheap-rate electricity at night to warm up heat-retaining blocks, designed to release their heat slowly throughout the day CC warm-air heating consists of a network of ducting to distribute preheated warm air around the home CC underfloor heating uses either heated electric cables or water filled pipe coils to warm up the structure of a building. Underfloor heating is often installed in new buildings instead of the more traditional radiator system.

Underfloor heating, often referred to as radiant heating, merits a review of its design in order to understand how it works effectively, compared with water-filled radiator systems. Radiant heating Radiant heating uses infrared heat rays that do not warm up the air through which they pass but the structure upon which they fall. In other words, radiant heating does not directly increase the temperature of the air in a room; instead, it warms up the structure of the building.

When a person enters a room, their body tries to become the same temperature as the surrounding structure and, as a consequence, if the building is cooler than you are, your body loses infrared heat as it tries to even out the temperature difference. If, however, the structure of the building is warm, no heat will be lost from your body in this way. As a consequence, the ambient temperature of the room can in fact be cooler than your body and the building as the air temperature does not unduly affect your body temperature. Coils filled with water are laid within the floors and, if they are left on long enough at a temperature of around 40°C, they will emit sufficient radiant heat to slowly warm up all the surfaces and solids within a room to a temperature compatible to that of the human body – around 33°C.Traditionally, UK homeowners put on their heating for only a few hours in the morning and a few hours in the evening.

This limited amount of time is rarely sufficient to warm the whole building and, as a result, higher flow temperatures are used to warm the structure. This creates a certain amount of discomfort underfoot due to the elevated water temperature in the underfloor pipes, and also reduces the efficiency of the boiler. For a radiant system to work really well, long periods of low-temperature water heating are required. The other major disadvantage of this system is the problems created if the pipe coil leaks. Fortunately, leaks are quite rare, but it can prove very costly to find the leak and make the repair.


For more helpful articles about home heating visit our uk friends for boiler quotes and other interesting articles.

The ten most common hvac plumbing problems

modern-basinA quickfire guide to the causes of ten of the most common plumbing problems.

1. Water flowing from an overflow pipe  This is the result of the water not closing off fully as it enters the WC or storage cistern located in the roof space.

2. Dripping tap  This is often caused by a faulty washer, which fails to close off the water.

3 WC will not flush  The most likely cause of this problem is the large diaphragm washer being worn out.

4 Blocked sink  This is usually caused by the build-up of grime and debris within the trap.

5 Blocked toilet  If someone flushes excessive paper or inappropriate items down the pan, the outlet will become blocked.

6 Water supply won’t turn off  Several valves within the pipework that are not operated from one year to the next typically seize up and become inoperable.

modern-bathroom-toilet7 Water leaking from the body of a tap  This problem only occurs when water is flowing through the pipe fitting in question. It is generally from that part of the tap that allows the spindle or head to turn. The problem is resolved by repacking a gland or replacing an ‘O’ ring.

8 Banging/noisy pipework  There could be several reasons why you would encounter noises from your pipework, from the pressure being too high to insufficient room for the pipes to expand.

9 Water coming through the ceiling, pipe or appliance  Clearly, a leak always requires immediate attention. The first thing would be to turn off the water so that you can then tackle the leak, and you may also need to review the plumbing processes: pipe connections and pipe jointing methods.

10 Heating or hot water will not come on  This would suggest an electrical fault, which would be beyond the remit of this book; you may need to consult a specialist contractor. However, it is worth reviewing the heating and hot water controls and the immersion heater, if used.

For more helpful articles about home heating  visit our uk friends at for uk boiler quotes and other interesting articles.

The home comfort experts

We are committed to providing our valued customers with the best service at the best price, always with the utmost in fairness and honesty – every visit, every call! That’s what our customers expect, and that’s what we expect from everyone in the company. Our people are certified, knowledgeable, friendly and excited to help you with your Fort Collins heating and air conditioning needs. We install and repair all major brand name heating and cooling systems, specializing in residential home service and installation, we are confident that our home comfort experts will meet and exceed your expectations while creating a lifelong relationship. Call us now to schedule a free estimate or service and find out why we are Northern Colorado’s most recommended home comfort service company.

Swan Heating and Air offers a wide range of furnace repair services in Fort Collins  to meet your every furnace need. Please contact us to find out how we can improve your home with our high quality furnace products & services from Loveland to Fort Collins and northern Colorado, including:

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Fort Collins, Loveland and Northern Colorado hot water heater repair and installation from Swan Home Comfort.

You don’t use hot water heaters 24 hours a day, yet you’re paying to heat water all day long; with tank style water heaters you heat and reheat the same water… even when you’re not home or sleeping! Tankless heating technology is a more efficient way to heat water while saving money and recapturing valuable space in your mechanical room.  Tankless water heaters heat water on demand and deliver an endless supply of hot water for as long as you need it.  Swan Heating and Air does more than just Fort Collins heating and air conditioning. Contact us today for all of your hot water heater needs.

Save money on hot water heaters and installation with Swan Home Comfort.

The amount of money wasted in the U.S. in the last 12 months from heating hot water in tanks is OVER 7 BILLION DOLLARS!  We offer several options in tankless on demand hot water heating systems. Please contact us to find out how we can help you with your hot water heating needs.

Swan Heating and Air Conditioning offers air conditioner repair, installation and servicng in Fort Collins, Loveland and Northern Colorado. We services all types of air conditioning systems from major manufacturers. Please contact us to find out how we can improve your home with our high quality products & services from Loveland to Fort Collins, including:
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According to the E.P.A. indoor air can be 2-5 times more polluted than the air outdoors. Improve the air quality in your home with a whole house air cleaner.

Fort Collins Heating and Air Conditioning offers several whole house air cleaning products. Please contact us to find out how we can improve the air quality in your home.  

Air in your home that is too dry can be uncomfortable to breathe, and can damage wood products like flooring, pianos, picture frames and cabinetry. In the winter it is very important to add moisture to the air since dry winter air can drive down the relative humidity level in your home to less than 15%, which is drier than the air in most deserts.  Swan Heating and Air – your Fort Collins heating and air conditioning experts will set you up with a humidifier that will help keep the humidity in your home at the proper level. 
We have a variety of whole house humidification systems. Please contact
us to find out how we can improve your home’s relative humidity level. 

Letting people into your home, even to do necessary maintenance and repairs, requires some trust. That is why when we hire, we run a criminal background check and drug screen. Our technicians are certified by N.A.T.E. (North American Technicians Excellence) and the E.P.A. to work with environmentally harmful chemicals. While on your property our technicians will not smoke cigarettes, chew tobacco, drink alcohol, use your restroom, phone or refrigerator. They are mindful of their speech and will have drop cloths on the floor or shoe covers on their feet. Our technicians are in company uniforms at all times and drive new Swan service vehicles.
Finding the right person for our company can be a daunting process, but when we hire someone we are confident that we can trust them in our home and in yours. At Swan Heating & Air Conditioning, we are a team. Our people are not employees. We encourage everyone to see themselves in that fashion. Employees have a job and are focused on getting a paycheck. Team members have goals and are focused on winning.

Every position in our company is extremely important. We believe our people must all be team players. For us to be successful as a team, there must be three winners in everything that we do. This includes how well we sell, service, and install; how we dress, communicate, and act; how courteous we are when driving and how neat and clean we keep our trucks.

The three winners must win in this order…

First, the client must win. They must be our first consideration in everything we do. Without clients, we would not be able to support our team.

Second, the team member must win. If the team member enjoys what they do, and is providing for their family and themselves, then they are able to make the clients happy.

Third, the team must win. If the team doesn’t make it’s goals then we will be in danger of losing both our team members and our clients.