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8 years ago
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15 SEER using more energy than 10?
Comments (15)Some easy simple ways for anyone to check the performance of their air-conditioning system Try to check the run time and off times of the air-conditioning system and write down the outdoor temperature; it's best to do this on the hottest days and even when the humidity is at its highest. Let's say the air conditioner runs for 15 minutes, then off for 15 minutes before it restarts, that's a total of 30 minutes for complete cycle so you take 15 minutes and divided by 30 minutes and you get .5 or 50% runtime; will say I have 2 ton air conditioner but due to ductwork and other factors that will not deliver even 23,000 BTU per hour instead figure 90% of 23,000 and multiply that figure 20700-Btuh by .5 that is only 10,350-Btu used per hour. That formula can be used for any complete time span cycle. Another formula is the EER or energy efficiency ratio formula; the BTU per hour divided by the wattage used. Another way to use the formula is to take the BTU/hr and divided by the units EER rating. Let's say the air conditioner as a nominal rating of 23,000 BTU per hour divided by a 9.5 EER that is 2,421 Watts of power used. A technician can then taken amp probe and multiply the amps times the checked voltage which will equal Watts the unit is actually drawing. From that reading you can figure what its actual EER is. Another way to verify what the load is, is to do a load Calc; I'll provide you with the free online load Calc with which you can experiment with until you get a proper load Calc performed, which you will then have to print out because you cannot save your load Calc's. You can also use a indoor humidity gauge and write down the humidity level while taking the temperature difference between the supply air in the return air in your home; then go outside and take the temperature of the discharge air and subtract the outdoor temperature from it.On a 10 and 12 seer condenser the indoor split at 50% relative humidity and 80ðF will should be around 19 to 22ðF. The outdoor condenser split should also be between 19 and 22ðF. Totally Free Load-Calc This Free online calc will help you determine equipment sizing & point-out areas that need efficiency retro-work - Once you calculate the page it saves the inputs for up to 24 minutes or, until you change inputs or close your browser. You can easily reduce infiltration rates yourself, therefore, IâÂÂd use 0.4 ACH (Air Changes per Hour) be sure to add the (Air Changes per Hour) CFM into the âÂÂFresh Air Recommended âÂÂline-slot, or it wonâÂÂt figure the Infiltration & fresh air Btuh. Print & read all the load-calc instructions; when U think U have it RIGHT Print the results; U can't save the results... Here is a link that might be useful: Free Whole House Load-Calc...See MoreDeep freestanding tub that holds more than 15" of water
Comments (1)I should add that I would like it to be at least 61 inches long...See MoreBalboa Park picture
Comments (6)That is one crazy looking Euphorbia, love it! Looks like it has one lonely normal branch sticking up on the back left....See MoreWolf Books ... title must have 15 characters?
Comments (32)Sons of the Wolf by Barbara Michaels. I really liked her books back in the olden days. She was actually Barbara Mertz and also wrote as Elizabeth Peters. I liked all those gothic-type books. Mary Stewart was my favorite, although she mostly wrote current-day stories. I blame her for my love of travel. Her characters were always having adventures in different countries. BTW, I'm just back from our Switzerland-Austria Odyssey Tour. It was great--possibly the most tiring trip I've made what with climbing to the tops of stuff. No Heidi sightings, but I did get a souvenir Christmas ornament of her....See More- 8 years agolast modified: 8 years ago
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moonie_57 (8 NC)Original Author