04-10-15, 07:47 PM | #611 |
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What happened to global warming ?
We have been running A/C , off and on , for several weeks . God bless Wyr |
04-10-15, 09:45 PM | #612 | |
Lex Parsimoniae
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Climatologists to physicists: your planet needs you
Quote:
I think there's been some kind of misunderstanding... Climatologists to physicists: your planet needs you : Nature News & Comment "There is a misconception that the major challenges in physical climate science are settled. “That’s absolutely not true,” says Sandrine Bony, a climate researcher at the Laboratory of Dynamic Meteorology in Paris. “In fact, essential physical aspects of climate change are poorly understood.”"
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My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less.. |
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09-03-16, 06:04 PM | #613 |
Lex Parsimoniae
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I started this thread about 7 years ago.. ( 6 years, 11 months)..
And now I'm going to remove my living room Sanyo.. The indoor unit is going become a parts supply (hanger queen). And the outdoor unit is going back to the Den, to replace the old 'repaired' and zapped main-board unit. I'm going to pump down the Sanyo and move it tomorrow when it's nice and cool. If I can get some help with the heavy lifting.. Maybe I'll get it running in the den before night fall.. Because Monday looks like rain..(Hurricane off the coast).. Short pressure test and a couple of good vacuums cycles should do it.. Maybe later, I'll put a -20 Gree Crown in the Den, or maybe I'll try to squeeze another 7 years out of this old Sanyo.. Starting Tuesday, the weather looks good, like Gree Crown installing weather! The summer heat might be coming back a little, later in the week.. I see one 90F in the forecast. If the living room Gree install is slow, we'll have the Sanyo Den running good by then.. Fingers crossed! I think this thread has run it's course..
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09-03-16, 07:10 PM | #614 |
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Any idea how much money in energy savings vs cost of equipment / tooling ? Over the last 6 years 7 months ?
Best of luck & many thanks for all the help / info / advice . :-) God bless Wyr |
09-03-16, 08:19 PM | #615 |
Lex Parsimoniae
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I forget the cost of things. Other people have kept better records than I ever could.
Buying the M/S install gear is kinda like buying ham radio gear or hobby test equipment, or new bowling shoes to me. I'm not even thinking about the cost of the tools, because just a couple of visits from the HVAC man with his vacuum pump, and fancy electronic gauge set etc. Would likely cost me as much as my tools.. I think it was about $500..?. People who install these things for living, charge as much for install, as the M/S cost.. I've heard of some really high estimates of unit+labor.. More than a few were over $5,000.00 and that seems high to me.. As to the system cost, vs savings? That's not real easy. Because of the mild summers here in MA, cooling isn't normally expensive. But, our old 14,000 BTU wall shaker sucked up some major KWH in it's day.. Those things are power hogs.. So, M/S cooling beats shakers hands down. Most of the money we saved was by not burning home heating oil.. Since 2009, the price of heating oil has not remained steady... I'm going to guess that having the oil truck deliver 100 to 200 gallons of oil about 15 or 20 times, (since 2009) would have cost somewhat more than a Sanyo and the tools..
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09-03-16, 08:29 PM | #616 |
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Hmmmm.... low heating oil prices.
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09-04-16, 08:41 AM | #617 |
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Our gas fired central furnace is duct-ed through out the house .
However , my computer room has independent heat . As does both bathrooms . Kitchen rarely needs heat . We run the 2 MS HPs to condition those 2 rooms , up to the point where Outside Air Temps make it necessary to use the gas fired furnace . So , we hope that lowers overall heating costs somewhat . God bless Wyr |
09-04-16, 01:18 PM | #618 |
Supreme EcoRenovator
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The economics of both fossil fuel and heat pump systems depend on a whole lot of variables. Fuel prices fluctuate, as do electricity rates. In many areas, they are tied to each other by the power utilities, especially those burning coal or natural gas to generate line power. This is only one piece of the puzzle.
The overall comfort level provided by the system employed is another important factor to consider. Gas and oil furnaces tend to run more economically if the burn time is minimized. This is accomplished by using relatively short blasts of hot air, followed by a "quenching" of the heat exchanger, then shutoff until the next call for heat. Many mini-split models use a different scheme, providing "merely warm" air for a longer period of time during each call for heat. The more elaborate models (variable-speed inverter type) actively manage the discharge air temperature (to a lower outlet temperature) to maximize unit efficiency. Generally, the more gradual the temperature changes, the more efficient a heat pump unit is. This operation is not appreciated by many owners who have become accustomed to the "hot air blast" method employed by the old-fashioned fossil fuel heaters. This is why some owners are never completely satisfied, with regard to comfort levels, of heat pump systems. Since the heat pump doesn't provide noticeably hot air from its discharge vent, it can't be heating well... Some manufacturers have integrated "hyper heat" or "turbo" modes into their systems to attempt to replicate this initial blast of "hyper-heated" air. Regardless, it's not the same effect as a fossil fuel unit. Some users are satisfied by this mode of operation, at least until they figure out it affects the heating bill (in a bad way) to run the units in this mode. As xringer described with his sanyo units, this "turbo heat" mode stresses the heat pump and can lead to longevity issues. |
09-04-16, 10:34 PM | #619 |
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Yup, that $1.99/gal was roughly what I paid to have my oil tank refilled last month. Looking forward to an eventual setup based on MS HP for building heat, and ASHP for domestic hot water. At that point, the oil furnace becomes the emergency backup heat, and a PV array will generate the kWh to feed the HPs.
Looking forward to the Gree install experience report. |
09-05-16, 02:19 AM | #620 |
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Hmmmmm ........
Makes me wonder . My understanding that part of the cost of a petroleum product was the cost of refining . I would guess gasoline requires a significantly greater refining cost than heating oil ? We are paying around $ 2.00 a gallon for unleaded gasoline . This price includes a a fair chunk of " road tax " . You are paying $ 1.99 a gallon for heating oil , which should , I think , be cheaper to refine . Does the $ 1.99 include any tax , also ? I am wondering if you are getting gouged on the price of heating oil ? Of course , I figure the distributor is delivering the heating oil to your door . That has to cost something . What is a typical size of a residential heating oil tank ? Is propane / butane available in your area ? I wonder what the cost would be ? The majority of people in our area heat with natural gas . God bless Wyr |
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air conditioner, diy, heat pump |
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