Posts Tagged ‘Furnaces’

A Question from Green Lake: How Warm is Furnace Heated Air?

Wednesday, December 7th, 2011

When your furnace turns on every day and warms your Green Lake home, just how hot is the air being blown through your vents? It’s a common question and while it varies depending on the type of furnace you have and the length of your ductwork, normally, the air is about the same temperature in most homes.

The Heating Process

When you turn on your furnace, it ignites fuel (gas or oil) or heats elements (electricity). A blower fan blows air through the heat exchanger and then into ductwork that distributes the heated air to vents around your home. When the combustion occurs and air is first heated, the temperature is between 140 degrees F and 170 degrees F.

This is extremely warm and could be dangerous to anyone if they got too close to it or it was blown directly into your home. However, as the heated air is distributed into your home it starts to cool. In some cases, it loses a significant amount of its energy in the ductwork.

This is intended, of course, because the temperature would be much too high if it was distributed directly to your rooms. That’s why high velocity ductwork often requires regulation to avoid overheating of the air. Cooling like this is normal and results in a better, more evenly distributed airflow.

When Something’s Wrong

To know something is wrong with your heating system, you must first understand what temperature air normally is when distributed through the vents. This will vary depending on which room you are in and how big your home (and furnace) are. However, if you notice a sharp drop off in comfort level in your home, it takes longer to heat rooms when cold or if that heating is suddenly uneven, it may be time for someone to inspect your furnace and check for potential problems.

A technician will then check to see if the air is being heated to the target 140-170 degrees F or if heat is being lost in the air handler or ductwork. There are a number of issues that can contribute to lost heat in your heating system – the easiest way to be sure the problem is solved properly is to call a professional when you notice the problem.

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What Do the Energy Stars Indicate? A Question from Wallingford

Monday, November 21st, 2011

If you’re in the market for any type of appliance for your Wallingford home, you’ve probably come across some that boast an Energy Star certification. But what does this really mean? After all, there are all types of special labels that manufacturers put on their products to make them look better, so how can you know which ones are really worth paying attention to?

Why Energy Star Matters

The truth is that no matter what type of appliance you’re looking for, from a coffee maker to a new furnace, buying one with the Energy Star label is definitely a good investment. This certification is conferred by the Environmental Protection Agency (EPA) and it can only be used on products that pass the EPA’s stringent tests for energy efficiency and environmental impact.

Energy Star products create fewer pollutants like greenhouse gasses because they use less energy to get the job done than their inefficient counterparts. This is great for our planet, but it also translates to savings for you as a consumer. Because Energy Star appliances use less energy to heat or cool your home or do whatever else you need them to do, your monthly bills will be significantly reduced.

Quality and Performance Measured

And you don’t have to worry about inferior performance as a result of increased energy efficiency either. Energy Star products can only receive the label if they provide all of the features you’ve come to expect from comparable products across the board. They need to maintain high energy efficiency ratings while still maintaining a superior level of performance.

While it’s true that you may wind up paying a bit more for an Energy Star product, that is only a one-time cost. If you compare the monthly savings you’ll receive by using your Energy Star appliance on a regular basis to what you would pay out over time with a less efficient model, it’s easy to see how the Energy Star product costs you less.

For all of these reasons, the Energy Star rating is definitely worth looking out for when shopping for home appliances and equipment. These products are made to be reliably energy efficient and can save you a ton over the years as long as they’re properly cared for.

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Five Important HVAC Maintenance Tips from North Seattle

Monday, October 24th, 2011

Do you have a “mental checklist” of chores that need to be done a regular basis around your North Seattle home, such as cleaning the window treatments, washing windows, shampooing rugs, etc.? There are various areas of your home that need regular maintenance and cleaning – and that list includes your heating and cooling (HVAC) equipment. Do you know a poorly operating furnace can cost you in increased energy usage and higher utility bills? That same poorly operating furnace can be discharging harmful carbon monoxide gas into your home, creating a health risk.

So, it is important to keep your furnace in peak operating condition and the best way to do that is by making a checklist of HVAC maintenance tasks. Let’s look at five of them.

Check your filters. Routine replacement of your furnace filters should be every 1-3 months, depending on the indoor air quality of your home, number of occupants, size, etc. You can purchase disposable filters online, at a local “big box’ retailer, or from your local HVAC contractor. A visual inspection of your filter is the best way to determine if it needs replacing. If you have a removable electronic filter, it should be cleaned every few months using soapy water and a hose. Any restrictions to air flow through the filters can lead to poor indoor air quality and will cause your furnace to work even harder to circulate warm air through your duct system.

  1. Clean and insect the blower assembly and motor. You can do this with a vacuum. Also check the fan belt to make sure it is not too loose or if it has any cracks or splits.
  2. Look for any obstructions in vents and returns. Believe it or not, your furnace needs “help” to operate. Any build-up of dirt or debris around the grilles of your ventilation system will just make your furnace work a lot harder. Do a visual check inside and outside and pay special attention to flues and chimneys, where indoor air is exhausted. Any blockage can result in an accumulation of poisonous carbon monoxide gas.
  3. Keep the area clean and clear around your furnace and water heater. Never store flammable liquids near your heating equipment. Your furnace room is not a storage closet.
  4. Revisit your home’s insulation. When was the last time you checked out the insulation in your attic or crawlspace? Is it securely in place or drooping down? Are there bald spots where the insulation has deteriorated? Is the insulation sufficient or should it be upgrade?

Tips 1 and 2 relate directly to furnace maintenance but tips 3 to 5 are equally important, having a direct bearing on how your furnace performs and its ultimate efficiency. If you follow all five tips and have an annual inspection from a qualified HVAC contractor, you should enjoy a fall season of comfort, warmth, and safety.

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How a Furnace Works: A Guide from Seattle

Wednesday, October 12th, 2011

Do you know how your furnace works? Believe it or not, lots of Seattle homeowners probably can’t explain the operation of furnace. It probably isn’t at the top of your “to do” list. It’s only important to know that once you set your thermostat to a desired temperature, the furnace comes on and warms the house.

The most common furnace is fueled by natural gas but there are other examples of heating equipment such as boilers, electric baseboard, or geothermal. But let’s look at how a gas furnace works since natural gas is found in most U.S. households. Gas furnaces use natural gas or propane to provide energy used for generating heat.

When the temperature in your home falls below the level set on the thermostat, an electric pilot light automatically ignites to heat a burner inside the furnace. This burner uses gas to generate heat within a combustion chamber inside the furnace. After the furnace senses that the thermostat has triggered the flame and that it is properly lit, the actual spark (or ignitor) is turned off.

Simultaneously, a motor in the furnace pulls in air from an exchange or return, which could be a grill in the floor, ceiling, or wall of a house. That air flows through ducts into the plenum of the furnace. The plenum is on the opposite side of the heat exchanger from the burner.

Gas will typically burn for at least two minutes before the blower starts to disperse heat throughout your home. This extra time gives the air an adequate period of time to warm up and also so that cold air won’t be pushed through the vents into the rooms in your house at the start. After either the preset time (roughly two minutes) or pre-established temperature is reached, the blower’s motor is turned on and it blows air over the heat exchanger, which usually consists of a series of copper tubes or pipes. When a fan blows air onto the heat exchanger, the air is heated. This heated air is then blown through a series of ducts to heat your home via vents in the floor, walls or ceiling. Exhaust fumes from the combustion process exit the furnace through a gas flue or chimney.

Just as the heat in your home turns on when a certain temperature is reached, it also turns off after the rooms are warm enough, thanks to your thermostat. The thermostat again senses the temperature in the room. When the room warms up to the temperature set by you at the thermostat, the gas valve is switched off, stopping the flow of gas. After the gas is turned off, the blower motor will still run for a few minutes, allowing the heat exchanger to cool off a bit. In some furnaces, the blower motor never shuts off, but operates at low speed to keep air circulating throughout your home.

In a nutshell, your thermostat is the brain in your heating system and your furnace is the brawn, doing most of the work.

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