New to posting. An often reader of posts. I have a two story which includes a daylight basement, main floor 900 sq. ft., 600 sq ft basement which includes bedroom, office, utilities. I have a Bryant Plus 80 gas furnace, 60,000 BTUs, oversized, noisy, and on its last leg. Very dependable of 20 years, only had to replace the circuit board. One take away for me in talking with Trane, Mitsubishi, Bryant, Carrier, and Lennox contractors (yes, I am driving my wife nuts) is my 1955 has a rather well-designed duct system originally designed for a oil furnace supports a 2 ton system. I guess fortunately the contractor who manual J says my heat lost supports a 2.5 ton furnace. Most have proposed 2.5 or 3 ton system. So far many of us, the existing ductwork defines ours options. I have upgraded all windows and attacked heat lost. Live in Seattle so the current electric and gas costs are relatively low. So my debate with myself as I plan to be in this house for 20 years, do I go all electric heat pump or hybrid. Any advice on quiet system as the furnace is adjacent to bedroom and home office? Does any have a sense of the service history for Mitsubishi ducted air handlers(SVZ-KP30NA)? That equipment seems relatively new to me. I can get the Mitsubishi installed at a significant savings to a Trane dual fuel XV-19.
2 ton ductwork as a given for furnace replacement
Mave
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New to posting. An often reader of posts. I have a two story which includes a daylight basement, main floor 900 sq. ft., 600 sq ft basement which includes bedroom, office, utilities. I have a Bryant Plus 80 gas furnace, 60,000 BTUs, oversized, noisy, and on its last leg. Very dependable of 20 years, only had to replace the circuit board. One take away for me in talking with Trane, Mitsubishi, Bryant, Carrier, and Lennox contractors (yes, I am driving my wife nuts) is my 1955 has a rather well-designed duct system originally designed for a oil furnace supports a 2 ton system. I guess fortunately the contractor who manual J says my heat lost supports a 2.5 ton furnace. Most have proposed 2.5 or 3 ton system. So far many of us, the existing ductwork defines ours options. I have upgraded all windows and attacked heat lost. Live in Seattle so the current electric and gas costs are relatively low. So my debate with myself as I plan to be in this house for 20 years, do I go all electric heat pump or hybrid. Any advice on quiet system as the furnace is adjacent to bedroom and home office? Does any have a sense of the service history for Mitsubishi ducted air handlers(SVZ-KP30NA)? That equipment seems relatively new to me. I can get the Mitsubishi installed at a significant savings to a Trane dual fuel XV-19.
___ ___ ___ HYBRID
________________
2-Ton, 2-stage Heat pump { addresses load and noise reduction }
40,000 BTU/HR Furnace { addresses emergency planning }
____ _ _ _ ( 80% or 95% ? ... depends on Actual heat loss [ Glass Area ? ], Balance Points and electric & N.Gas rates)
Does the Example LOAD CALC match your situation?
Attachments
The Trane dealer who used wrightsoft calculated 31,252 for heating and 17,486 for cooling. The basement space really doesn't need cooling. So of his numbers are double yours but he did not take into account for duct, ventilations and couple of others.
To note, I'm on a slope so the west side of the basement is below grade.
Based on my last bill, electric (city provided via hydro) is 12cents per KWH, gas provided by private company is $1.08 per therm.
A consideration for us the days is the assault on natural gas by local politicians (reduction in greenhouse gas goals). Seattle doesn't want to be outdone by the likes of Berkeley, CA or god forbid, Portland.
(Sorry if this is a double post, as I'm new to this and not sure if the first post made it.
To note, I'm on a slope so the west side of the basement is below grade.
Based on my last bill, electric (city provided via hydro) is 12cents per KWH, gas provided by private company is $1.08 per therm.
A consideration for us the days is the assault on natural gas by local politicians (reduction in greenhouse gas goals). Seattle doesn't want to be outdone by the likes of Berkeley, CA or god forbid, Portland.
(Sorry if this is a double post, as I'm new to this and not sure if the first post made it.
How much of a hassle is dealing with high efficiency furnace condensate? My furnace is in the basement with the washer, dryer, and hot water heater. The space has a cast iron floor drain. The run to the drain is 10+ feet, plus another 6' to the outside wall. This section is a daylight basement. I've read the condensate is corrosive to cast iron and one most use some sort of limestone filter to address this issue. Is this a big enough issues to select an 80% furnace?
2-ton, 2-Stage heat pump with 8 KW HEAT strip
______ NO FURNACE
TRANE model 4TWR7024 with TEM6AOC24 OR EQUAL
_-- ADD 10 KW Natural Gas Generator for Emergency
Attachments
My annual heating bill with the 20 year old oversized Bryant is around $550, with $144 of that due to $12/month to have an account. I happened to have share with you February which is the coldest month around here.
Any advice on pros/cons of selecting a 2 1/2 ton Mitsubishi heat pump with a ducted air handler versus a similar sized single stage Trane with air handler which will cost $ more. I have three bids on both types of equipment from reputable firms. A two stage will be around $ more. The Trane XV19 version adds another $ or so.
Mitsubishi is less expensive then similar sized Trane, Carrier, other.
Also, around here, we have our share of cottonwood trees and dandelions love the rocky soil.
Any advice on pros/cons of selecting a 2 1/2 ton Mitsubishi heat pump with a ducted air handler versus a similar sized single stage Trane with air handler which will cost $ more. I have three bids on both types of equipment from reputable firms. A two stage will be around $ more. The Trane XV19 version adds another $ or so.
Mitsubishi is less expensive then similar sized Trane, Carrier, other.
Also, around here, we have our share of cottonwood trees and dandelions love the rocky soil.
MY reconcilation of Natural Gas use at $1.08/ therm,
weather (HDDs), building Thermal Envelope parametes
and efficient equipment
indiciates overall use of
~16,800 BTU/HR at 30'F ODT and 68'F inside
REFERENCES
Attachments
Can Manual-J provide an estimate on BTU needed say for 90% of the days requiring heat? For replacement furnace considering two-stage heat, should one focus on the first stage in mild climates? If second stage heat means some additional duct noise on a limited numbers of days due to ductwork that is undersized based on design guidelines, is that such a bid deal?
Or should one lock-in first stage and on those rare events make second stage available?
Or should one lock-in first stage and on those rare events make second stage available?
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