At Your Service 

It s time again to check your heat-and-air equipment.

If you haven t done it already, call your heat-and-air guy and tell him you want your heating system cleaned and serviced. If you wait until there s a cold snap, you ll end up on your heat-and-air guy s waiting list, behind the people who turned on their furnaces and found out about all the things that died in their sleep over the summer.

I tell everybody who ll listen: Get your heat-and-air equipment serviced twice a year, once before the weather turns hot and once before the weather turns cold. Heat-and-air service calls aren t cheap, but they re way cheaper than running a dirty, inefficient, and maybe even dangerous system. Service calls are surely cheaper than buying a new system years too early, which is what happens to people who don t want to pay for maintenance on their equipment.

I m proud to say that my downstairs heat-and-air system is finishing up its 19th summer of keeping the Jowers house at 70 degrees day and night. Believe me when I tell you, that s remarkable. Heat-and-air equipment usually lasts about as long as a dog. Mine has lasted much longer. That s because I get it serviced.

Before your heat-and-air guy shows up, I suggest you do the following:

1) If your furnace or heat pump is outside, make sure there s enough room around it. A lot of people are furnace-hiders. They either plant bushes around the outside heat-and-air equipment or they build a little corral around it. Your service man needs at least two feet of walking, squatting, and working room. If you ve got bushes in his way, trim them back or dig them up. If you ve got a corral, tear it down.

2) If your furnace is inside and you ve got junk piled up around it, move the junk. Just about every day, I look in attics and basements and find furnaces covered with Christmas decorations, baby toys, books, and luggage. Just like outside equipment, inside equipment needs at least two feet of workspace around it.

3) Take a look inside the equipment. Gas furnaces have easily-removable panels. Take them off and look inside your furnace. Make a mental note or even take pictures of water stains, rust, and debris inside the furnace cabinet. When your service man is done, check again.

I know some of you are thinking, Why should I do that? Well, in our little home-inspection business, we look at hundreds of gas furnaces every year. We ll find dozens of them filled with rust, burnt matches, and cicada carcasses from 1998. When we point these things out, a lot of home owners claim that they just had somebody clean the furnace. Sometimes, they even have receipts. Clearly, some of you people are getting ripped off. One way to cure that is to do your own before-and-after check. Another is to sneak up on the heat-and-air guy while he s working and offer him some refreshments. If he s doing something that you re sure is work, good. If he s sitting down smoking a cigarette and talking on his mobile phone, you might just need that before-and-after evidence.

If you have a mid-efficiency gas furnace, here s something else to check: There should be at least an inch of open space between the metal furnace vent (the exhaust pipe) and anything that will burn. The specification for this one-inch clearance is written right on the vent pipe. Even so, a lot of heat-and-air installers ignore the specification.

It s easy to check for proper clearance. Just eyeball the vent pipe. Here are the usual offenders:

1) The vent is too close to insulation. Often, the vent is touching or very close to insulation on the ductwork. Insulation has a paper facing. Even foil-faced insulation has a paper backing. That paper will burn.

2) The vent is too close to a wall or ceiling. Wallboard (which is the same stuff used for ceilings) is covered with paper. It ll burn.

3) The vent is too close to wood. In basements, vents often are butted up to wood framing or subfloor. In attics, vents are often butted up to wood framing or roof decking.

Now, a recommendation for those of you who are about to find out your existing gas furnace is dead: Buy a high-efficiency furnace that can be vented through PVC pipe. That way, you get a unit that will be cheaper to run, and you won t have to deal with the costs, dangers, and installation headaches that come with metal vent pipe.

You heat-pump owners should buy the most efficient system you can afford. High-efficiency systems are generally better built, last longer, and work better than the mid-efficiency systems.

If you buy the good equipment and treat it right, it might live as long as a good horse.

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