Recent comments in /f/Pennsylvania

thenewtbaron t1_j829geq wrote

Reply to comment by MarvelAtTheSky in PA Incentives for going to heat pump water heaters by gullyBo1z

Hundreds of feet deep.. sure bud.

You still haven't answered the fact that you get a benefit of savings in hot summer, you know the four months you mentioned that it would benefit that ac. If you use resistance heating, it will be the same as a normal heater heater

So, even if the water heater used full resistance heating for 8 months, and heat pump to actually cool the home during the summer for 4 months... It is cheaper than a normal water heater.

It is cheaper. No way around that... And it pays for itself I'm 5-7 years.

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MarvelAtTheSky t1_j827tbz wrote

Reply to comment by thenewtbaron in PA Incentives for going to heat pump water heaters by gullyBo1z

Yeah, I do Ground Source Heat Pump calculations too. All Air Source Heat Pumps such as those on these water heaters require a large volume of constantly heated air that above their ‘Balance Point’. Because of such a small fan on the water heaters the balance point is pretty high at 50-60, but you don’t want it to operate at the balance point, it’s least efficient there as at that point it’s COP 1 or at 100% parity to resistance heat. You would want a heat source that is hotter to get the rated efficiency otherwise the compressor runs progressively harder to extract enough heat.

1kw = 3412 BTU, it takes 1 BTU to raise 1lb of water 1° F, 1 gallon of water roughly weights 8.33lbs. So, 8.33x50Gallons = 416.5 lbs of water x 73° rise to get to 120°F tap temp = 30404.5 BTU / 3412 BTU = 8.9kW input total the interval depends on the wattage rating of the water heater and usually is presented as a recovery time. But 30404.5 BTU needed, that is a lot of heat. Ground source heat pumps require acres and acres of tubing to collect that much heat and their COP is very high at like a 5 or more, water heaters are only a 2.2ish. So the house’s basement would have to be hundreds of feet deep or have a large footprint to collect that much heat or loose 30404.5 BTU on a consistent basis to be totally free of the water heater using the resistance coil. Unless the heat comes from the atmosphere outdoors it’s costing you something, somewhere to move into your space. Newer, REScheck compliant houses loose around 21000 BTU per hour, so at 30404 to totally negate the need for the water heater to not use the ‘backup’ resistance coil. Your furnace would be chugging hard produce those BTU’s and that energy use issn’t required to be on the Energy Star label and is what is costing you money in whatever fuel source it uses.

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aello11 t1_j82439v wrote

Reply to I really messed up - speeding out of state, now what? by carazm

https://www.penndot.pa.gov/TravelInPA/Safety/Pages/Frequently-Asked-Safety-Questions.aspx

If I get a traffic citation in another state, will I get points on my Pennsylvania driver's license?

If you receive a traffic citation for speeding or a similar violation in another state, you will not receive points on your Pennsylvania driver's license. If you fail to respond to that citation, it could impact your license in Pennsylvania. If you receive a DUI in another state, you could face penalties in Pennsylvania. For more information on Pennsylvania's Point System, check out the Pennsylvania Points System Fact Sheet (PDF).

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drewbaccaAWD t1_j820eih wrote

Reply to comment by Barnard_Gumble in Graduate Students at Temple University Lose Tuition Remission Over Student Strike by EranAfom

They aren't kids, they're probably all in the 25-35 age range. What they are is exploited cheap labor so that the university doesn't have to pay more for professors who have finished their PhD already.

Not sure what all they are demanding as I'm not following this strike, but I wouldn't just write them off as kids who don't have a valid issue with how things are being run. They are students, but they are also employees.

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