Choosing the right heating system for maximum efficiency

Getting the right heating system allows homeowners to enjoy their homes in better comfort. Getting the correct heating system also allows for maximum heat output that won’t lead to filing for a bankruptcy. There are lots of different heating units available in the modern HVAC market.

Making the decision to replace or have a new heating system installed can be a bit stressful because not everyone is educated on the pros and cons of each type. It’s important to know about a product before it is installed. Heating types:

Furnaces
Heat pumps
Radiant heating

There are lots of different furnaces available for today’s homes. A furnace is a device that accepts air from a home through a series of ducts and vents. The air is then stored into an area where it is warmed and eventually circulated throughout a home.

A majority of furnaces are powered through gas or electric sources. They can also be adapted to be used in conjunction with oil, coal or wood. Size also matters when it comes to a furnace because there’s no need to heat a 2500 sq ft. home when some don’t even own half of that.

Heat pumps are another form of heating. They come in two different types: an air source and a ground source. An air source heat pump utilizes warm outer air as a main source of heat. They are great for homes in milder and warm areas.

Ground source heat pumps are often referred to as geothermal heat pumps. They pull the heat from below a surface in order to heat a home. Installers of this form of heating often cite better energy savings as well as possible use of a water heater.

Radiant heat also comes in many different forms. It can be found in radiant baseboard heat, hydronic systems, and radiant ceiling or floor heat. This type o heat utilizes long metal units with electrical systems attached to the inside.

Each radiant heating unit is controlled separately through the use of a thermostat. The thermostat will not normally show the room’s temperature though. They can be used as a primary source of heat or as a secondary form in colder portions of a home.

Depending on the area in which one lives, the best options for heating systems may be:

Electrical
Natural gas

Electricity runs through heating elements where the resistance causes heat to become generated and spread throughout a home or office building. The heating elements are usually contained in a furnace and in some cases a baseboard that’s installed on the bottom of a wall.

Electrical service may need to be modified depending on the load requirements of the new heating system. A licensed electrician may be required for proper installation of a baseboard heater. Hiring an electrician will keep a home and family members safe.

Natural gas is efficient. The Annual Fuel Utilization (AFUE) indicates how resourceful the system is over the course of the heating season. A furnace with an AFUE of 95% will deliver 95% of the natural gas energy the home throughout the heating months.

Boilers create heat by boiling water. It is then distributed to other areas in the home through the heat exchange units. Boilers are available in various levels of effectiveness. There are the mid-efficiency boilers which have a AFUE rating of 85%. High- efficiency boilers are rated at a whopping 90%.

Modern heating systems can be very effective in homes. Modern systems are adapted to take on comfort control whenever an individual is not home. This is normally doe through a thermostat. A thermostat will learn an individual’s particular desired temperature and set it for when they arrive home.

A home heating system, no matter how well it has been maintained will eventually wear out. When it does it need to be replaced. A majority of people find it much easier to replace their heating systems with the same type.

There are a number of options for choosing a heating system for a home. One can chose two separate delivery systems or one that can provide warming and cooling functions. Knowing which type of heating works best will provide the home and family with desired comfort levels.

How Often Do We Need To Clean Furnaces?

For those people who live in area’s of the country that gets cold, it’s time to think about your heating equipment. With the technology new furnaces have today there isn’t much to do on them as far as setting them up for winter. In the old days (10 years ago and before) we were told to have our furnaces and boilers checked once a year. But now furnaces and boilers have electronics doing most of the work. There are only a couple of things that a service tech needs to do in today’s furnaces and boilers as far as a “clean and check” goes.

The old days:

In the old days when a service man (politically correct term today is “service tech” this term started about 21 years ago) when out on a “clean and check,” he had all kinds of things to do. First he pulled out all the burners and blew them out with co2, then he checked the heat exchanger for cracks using a mirror, then vacuumed up any dirt he found. He also changed the “thermocouple” (on a standing pilot, where the pilot flame burns all the time, the thermocouple tells the gas valve there is a pilot light, and it’s ok to open, and start the heat sequence) on the “pilot light” and blew out the pilot light assembly to make sure it would burn clean and that the pilot flame was positioned correctly on the thermocouple, and on the burner pilot runner.

After that he pulled the blower, and if it was a belt drive blower, oiled the squirrel cage bearings, motor bearings, and checked the belt for cracks . On a “direct drive blower” all he had to do was just oil the bearings on the motor.

Now all the burners are cleaned and the heat exchanger has been checked for cracks and everything is back in place, including the blower. On to the next step.

Now, if the service man was worth his salt, he checks the most important part of the furnace, the “limit switch”. There’s a limit switch in every; gas, oil, electric, or propane furnace, or boiler. It’s main function is to turn on the blower (usually 200′) and shut it off (around 110 or 100′ any cooler, and you would feel like there was a draft) and the most important job it has is to tell the “gas valve” to shut down the burners incase the blower fails. It keeps the furnace or boiler (boilers also have a “safety relief valve” like hot water heaters) from over heating and starting a fire.

What the better guys did was pull the blower wire off the limit switch and start the furnace burners. With the blower wire pulled off the limit switch, the blower can’t start, and when the furnaces gets to about 200 degrees, the burners should shut off and not relight again until the furnaces cools and lowers it’s temperature to about 140 degrees. Some guys just checked the limit switch by rotating the dial on the limit switch and blower settings until the burners shut off. I liked taking the wire off the limit switch and testing it that way because it was more real life working conditions in the event of blower failure.

One of the last things, and just as important as checking the limit switch, was to check the “flue pipe” to make sure it, or the chimney, hasn’t been blocked by soot or birds. It wasn’t uncommon to find dead birds in the flue. Some even made it into people’s basements. This doesn’t happen anymore with the new furnaces. And the very last thing that was done was to check for gas leaks.

Furnaces 10 years ago to the present:

Today’s furnaces and boilers don’t need the kind of attention from the service man like furnaces of the past did. On most modern furnaces all that needs to be checked is the “flame sensor”. The furnaces of today pretty much watch themselves. The burners almost never get dirty now a days because they are working in a mostly closed (80 plus furnaces are not, but the 90’s are) environment. The blower, gas valve, and all the safety controls (including the “limit switch” and “blower switch”) are run by a circuit board. The blowers are all sealed now too. They don’t even need to be oiled!

So how often do we want our furnaces and boilers checked?

That’s a tough question. It all depends on the environment your furnace is running in. It your furnace or boiler is running in an environment that has a lot of dust or animal hair, then it mite be worth it to have your furnace checked once a year. If your furnace is running in a relatively clean environment, you can probably get away with 2 or 3 years of not having to have to spend the money to have a clean furnace checked.

Don’t forget that these new furnaces shut down when they spot the slightest problem. Some tech guys feel the only real time for home owners to have their furnaces ( don’t forget where’re talking new furnaces not the old clunkers) checked, is when they don’t start. They don’t think the cost justifies what your getting in return.

But in the end, it’s the choice of the home owner to decide how often they have their heating equipment checked.