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Search: Posts Made By: Servicetech
Forum: Appliances & Gadgets 11-25-13, 06:08 PM
Replies: 35
Views: 12,381
Posted By Servicetech
Residential water chillers with "mini split"...

Residential water chillers with "mini split" style fan coils/air handlers could be the way of the future. Each room has it's own small air handler, therefore a way to deal with condensation. No...
Forum: Appliances & Gadgets 11-24-13, 07:18 PM
Replies: 35
Views: 12,381
Posted By Servicetech
Hydronics is practically non-existent in the...

Hydronics is practically non-existent in the south due to lack of AC capability.
Forum: Appliances & Gadgets 11-24-13, 12:47 PM
Replies: 35
Views: 12,381
Posted By Servicetech
No way I'd use flex in a crawl space around here....

No way I'd use flex in a crawl space around here. Wouldn't make it a year without a critter tearing it up. Hard pipe only for crawl installs.
Forum: Appliances & Gadgets 11-23-13, 09:15 PM
Replies: 35
Views: 12,381
Posted By Servicetech
70 degree rise with 140f discharge from the vent....

70 degree rise with 140f discharge from the vent. Add 5-10 degrees for the tempature exiting the furnace, you are proably close to hitting the high limit. Is the furnace a standard 80% induced...
Forum: Appliances & Gadgets 11-23-13, 08:45 PM
Replies: 35
Views: 12,381
Posted By Servicetech
125 degrees is HOT after 75 second delay, what is...

125 degrees is HOT after 75 second delay, what is the peak tempature while running? Is time delay digital with a board or a manual limit switch? I've not run into any board controlled blowers that...
Forum: Appliances & Gadgets 11-23-13, 09:01 AM
Replies: 35
Views: 12,381
Posted By Servicetech
Back to the original topic, it does appear that...

Back to the original topic, it does appear that duct losses are significant in the cycling loss calculations. Not sure hot much the 45 second burn time to heat up the exchanger costs in efficiency,...
Forum: Appliances & Gadgets 11-23-13, 08:57 AM
Replies: 35
Views: 12,381
Posted By Servicetech
Wind speed has a LOT to do with load, especially...

Wind speed has a LOT to do with load, especially on the heating side. 20F outdoor with no wind vs. a 15MPH wind makes a HUGE difference in heat loss. Did you account for wind speed when you were...
Forum: Appliances & Gadgets 11-17-13, 04:49 PM
Replies: 35
Views: 12,381
Posted By Servicetech
Lightbulb Cycling Losses for Gas Furnaces

How much does cycling losses of a gas furnace reduce AFUE vs. Thermal Efficiency? Loss of efficiency for oversized AC units is well documented, but I haven't been able to find anything conclusive on...
Showing results 1 to 8 of 8

 
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