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SAME PROTOCOL FOR ALL STORAGE-TYPE WATER HEATERS.
IT’S PARTICULARLY FORGIVING FOR HEAT-PUMP WATER HEATERS.
SAME PROCEDURE IN PLACE SINCE ~1998.
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!
VolPH"cP#TPH =VolGov"cP#TGov
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!
64.3 galhtr "day
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"1Btulb F
" 135 # 58( ) F = 39.6kBtuhtr "day
!
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!
6.6 galperson "day
# 4.75 kBtuperson "day
$365 day
yr$
1 person377 ft2 = 4.60 kBtu
ft 2yr
add laundry & dish# 5.5 kBtuft 2yr
add indiv. pipe loss# 7.0 kBtuft 2yr
TOTAL SPECIFIC DEMAND.
10 gal/p/day 11.6 DOE gal/p/day
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!
47" 20.5" 3in deep = 2890 in3 =12.5gal
!
Shower gallons = PHPP gallons"140 - 50F102 - 50F
= 6.6" 9052
=11.4gal I NEED TO SPEED UP 10%.
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!
7.0 kBtuft2yr
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Wright On Sustainability! JW%
IN A FOUR-PERSON HOUSE, RECOVERY
FROM ONE SHOWER COULD DROP THE AIR TEMP AS LOW AS 57 F, IF THE SPACE HEATER
DID NOTHING.
_ 9 A A N t q p p N % & 9 * N T % @ 7 D q A q 3 L T @ L q 9 A%
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!
5.5 kBtuft2yr
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Wright On Sustainability! EJ%
800<.:5%>"(#:>%,.5:#<%B0:$+0<,%$K0%QGK#=%0+%C0'+%EGK#=%>#()"+,%
NEEA GUIDELINES RECOMMEND DUCTING THE EXHAUST OF AN
INSIDE HPWH TO THE OUTSIDE, SO IT CAN REDUCE EXFILTRATION
AND THUS SERVE AS A HEAT RECOVERY DEVICE! (MAKES NO
SENSE IN PASSIVE HOUSE.)
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Wright On Sustainability! EE%
MORE WARMTH WOULD HELP,
WOULDN’T GET ANY COLDER THAN
GARAGE.
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Wright On Sustainability! EQ%
IT’S RUMORED THE AIRTAP
INTEGRATED UNIT FROM
AIRGENERATE IS GOOD TO THE LOW
30S…
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Wright On Sustainability! EX%
*+.52$%9:%3',$#.:#;.<.$=% EW%
THOSE PERCENTAGES
MAY NEED ADJUSTMENT. ;)
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YIKES ! ‘tsup Rheem?
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