GAS FURNACE的寿命。

[lookingfor]

我家的炉子是1985年2月装的LENNOXT燃气炉子，去年工作正常。这种东西的寿命都说是20-25年，今年该换吗？各位高见？

 

[vivina99]

I have same question.

 

[Timothy's]

If you have money and get a good deal, why not?
But it is not you have to . It is a nice to or a safer to. 20 25 years is a average, some bad one need to be replaced at 15, good one may last 35. lennox is good brand, it should at high end of that number.

The key component of furnace is the heat exchanger. A good company usually warrant it for 20 years if it is a coated steel. limited lifetime if it is stainless steel.

I will have a technician do a maintance and check out(about $100) if the heat exchanger is still good . it should works fine for another few years.

 

[PrideOfChinese]

A 1980s furnace is sure low efficient (it was designed at 50%, may be lower than that in running). Modern furnace is mid-efficient (80-85%), or high-efficient (90-95%), and equipted with variable speed motor which is quiet and energe saving. A new furnance could save you a couple of hundred bucks a year on gas bill and electricity bill.

So if you find good deal, it's worth to get a new one.

 

[bulaoniu]

我家的Furnace安装才五年，Do I need to do the maintance check already?

 

[lookingfor]

谢谢各位啦，很有启发。另外现在COSTCO(KANATA SINCE THIS FRIDAY)在卖LENNOX的炉子，价钱应该还可以，有需要的可以去看看。

 

[基础墙]

同意Tim说的。我也觉得，只要炉子还能用，就不必换新的。

Standard furnace从七十年代末八十年代初开始退出市场。八五年的煤气取暖炉，十有八九是mid efficiency。可以自己查一下炉子的说明书。

平常都说炉子的寿命在二十到二十五年，可是炉子那东西真没准儿，曾见过有的炉子不到十年就不行了（高效炉，漏了），也见过八Ｏ年的炉子，到现在都转得挺好。

为了保险，最好在入冬前请人来做个service，检查加清理。如果没发现什么大毛病，就接着用旧炉子吧。换个新炉子要花不少钱，而新炉子省下的煤气钱并不多。Mid-efficiency是80%的效率，新的high-efficiency差不多在9２％～９５％，按去年冬天的煤气账单，自己能算出来高效炉每年省多少钱。

为了预防炉子突然坏了家里没暖气，可以买个service plan。忘了具体的价钱，大概一百多元吧？我去年本想买的，可是来查炉子的技师说，你的炉子保养得挺好，闹毛病的可能性不大。我说那赌运气吧，没买。今年不单不打算买那个service plan，连检查都想省下了。照那个技师建议的，自己做做清理，勤换换滤芯，再对付一个冬天没什么大问题。

 

[PrideOfChinese]

最初由 基础墙 发布

Standard furnace从七十年代末八十年代初开始退出市场。八五年的煤气取暖炉，十有八九是mid efficiency。可以自己查一下炉子的说明书。

When I changed my furnace two years ago, I checked Union Gas website. It says if your furnace was made 10 years ago, you could be pretty sure it was low efficiency.

It's not hard to determine it from the external structure of the furnace. The exhaust gas of low efficiency furnace is very hot (it means a lot of energy lost), and the exhaust pipe is made by iron sheet. The mid and high efficieny furnaces generate warm exhaust gas. You can even touch the exhaust pipe with your bare hand. for this reason, the high efficiency furnance uses plastic (ABS) pipe for the exhaust pipe.

 

[基础墙]

The exaust of mid efficiency furnaces is pretty hot, you may not want to touch it. The temperature of the burning product at the exaust is over 100C. A few years ago manufacturers were trying to use high-temperature plastic vent on mid-efficiency furnaces but they were banned by the government soon (or the companies recalled all of them? can't remember details of the case).

Sometimes you may not be able to tell if it's mid or standard efficiency just by looking at the exausting vent, because lots of people kept their old vent when upgrading to mid-efficiency. To tell the type of the furnace, you need to look at the furnace itself.

Mid-efficiency furnaces use forced exausting because of the increased resistence in the heat exchange system, while a standard (or conventional) furnace doesn't have forced exaust, instead, you could find a big draft hood sitting on top (mostly) of it.

 

[基础墙]

最初由 PrideOfChinese 发布


When I changed my furnace two years ago, I checked Union Gas website. It says if your furnace was made 10 years ago, you could be pretty sure it was low efficiency.

I could be pretty sure that their information is wrong, at least in Ottawa and Toronto. I saw lots of mid-efficiency installed in 80's but barely see any conventional, except teh oil burning ones.

 

[liangzi]

基础墙，能告诉那个技师的电话吗？炉子的风扇有点噪音想找人看看。
你说的滤芯是长方形的duct filter吗？还是炉子本身的滤芯？

最初由 基础墙 发布
同意Tim说的。我也觉得，只要炉子还能用，就不必换新的。

Standard furnace从七十年代末八十年代初开始退出市场。八五年的煤气取暖炉，十有八九是mid efficiency。可以自己查一下炉子的说明书。

平常都说炉子的寿命在二十到二十五年，可是炉子那东西真没准儿，曾见过有的炉子不到十年就不行了（高效炉，漏了），也见过八Ｏ年的炉子，到现在都转得挺好。

为了保险，最好在入冬前请人来做个service，检查加清理。如果没发现什么大毛病，就接着用旧炉子吧。换个新炉子要花不少钱，而新炉子省下的煤气钱并不多。Mid-efficiency是80%的效率，新的high-efficiency差不多在9２％～９５％，按去年冬天的煤气账单，自己能算出来高效炉每年省多少钱。

为了预防炉子突然坏了家里没暖气，可以买个service plan。忘了具体的价钱，大概一百多元吧？我去年本想买的，可是来查炉子的技师说，你的炉子保养得挺好，闹毛病的可能性不大。我说那赌运气吧，没买。今年不单不打算买那个service plan，连检查都想省下了。照那个技师建议的，自己做做清理，勤换换滤芯，再对付一个冬天没什么大问题。

 

[基础墙]

最初由 liangzi 发布
基础墙，能告诉那个技师的电话吗？炉子的风扇有点噪音想找人看看。
你说的滤芯是长方形的duct filter吗？还是炉子本身的滤芯？

我没有他的电话。那是一个公司的技师，给人干活儿。要不然他也不会说那些往外推生意的话。这个技师挺熟练，懂得也挺多，可是他的活儿不是那么仔细。他清过的水管（condensing drain），我自己又洗了一遍，才算弄干净。

我的感觉，这些挣工资的技师，多少都有点干活不上心，可是他们肯说实话。

我说的滤芯就是那个长方形的。我买了个能清洗后反复使用的那种，每个月都能洗出一池灰溜溜的水。

 

[Timothy's]

最初由 liangzi 发布
基础墙，能告诉那个技师的电话吗？炉子的风扇有点噪音想找人看看。
你说的滤芯是长方形的duct filter吗？还是炉子本身的滤芯？

Check your owner's manual. Some of furnace fan has a oil port. You should add few drops of oil every year. If you never did, it may have some noise. Not all funace have a oil port, many of them are sealed in. You don't oil sealed one.

 

[小溪潺潺]

昨天打开heating时, 发现没热气.我家的Gas Furnace6年新.没发现Thermostat有问题.
给当初装Furnace的Harding公司打了电话,Technician说$93/hour. 又给Direct Energy 打了一个电话,说要交一个$139 的启动费,外加$99/hour. Service plan 是 $139启动费 +$22.29/month. 这和基础墙提到的"大概一百多元吧"相去甚远.
请推荐一个价格服务合理的dealer.
自己还能做哪些诊断呢?

 

[Timothy's]

Harding is good. They did my service. The job was well done and they charged my one hour for that.