It's a 180k BTU monster from the 70s,
anotherengineer wrote:Belt driven, wow that's gotta be old. On fuses or breakers? Newer houses is usually code for a furnace to be on its own breaker/circuit. If your furnace is belt driven, it could mean that is 30+ yrs old, and if you house is fuses, there very well could be 20 things on a circuit.
ludi wrote:1970s furnace? I wouldn't bother upgrading or retrofitting it. Just keep getting the heat exchanger inspected and save for the replacement.
In the meantime, a "floating neutral" condition sounds like the best explanation and likely indicates a significant problem forming at either the box or the transformer neutral connection. DO have it inspected soon.
setaG_lliB wrote:Looks like I was wrong. The furnace, washer, and dryer all share that 20A circuit. I've never noticed it before, but the washer and dryer also cause a bit of a surge when they start up; just not as severe as when the blower motor starts.
setaG_lliB wrote:Furnace and dryer are both gas.
The fridge is connected to a different, 15A breaker. When it, or any other appliance upstairs turns on, the lights dim.
Yeah, I guess I'll get an electrician in to look at it. The increase in brightness in the living room is quite high, even if just for 1/4 sec.
Khali wrote:Lets be generous and say your existing furnace is 65% efficient. For every $100 your spending for gas you could be saving any where from $20 to just over $30 with a new furnace. Again, those savings numbers depend on how efficient the new furnace is. That $20 to $30 can add up making it really easy for a new furnace to pay for itself in less than ten years.
setaG_lliB wrote:Though I'd like to replace it with something quieter and more efficient (was told I'd be able to replace this 180k BTU gas guzzler with a 100K BTU and feel just as warm), I'm just too poor at the moment. The HVAC guy did say that the heat exchanger in this thing would probably last another 25 years. It's an Airco furnace, which were apparently built like tanks. Might explain why they're no longer in business.
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