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HVAC Discussions - Heating, ventilation and air conditioning.
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Posted by designwebs on March 6, 2009, 7:52 am
I have a coupls guys come out and give me est. on our 15 year old heat
pump/ Air Condintioning system. They have suggested or should I say
try to sell us Maytag, Tempstar and Goodman systems. For the pros. on
the list what can you all say about these units.
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Posted by Steve on March 6, 2009, 9:35 am
>I have a coupls guys come out and give me est. on our 15 year old heat
> pump/ Air Condintioning system. They have suggested or should I say
> try to sell us Maytag, Tempstar and Goodman systems. For the pros. on
> the list what can you all say about these units.
http://www.consumerreports.org/cro/appliances/heating-cooling-and-air/gas-furnaces/furnaces-repair-history-205/overview/
questions you need to ask are who is going to do a room-by-room manual J
heat load and loss calc to correctly size the system for your home(there is
no such thing as "rule of thumb"). Who is going to be there when the system
needs service?? Does the system have R410a refrigerant in it(R22 is being
phased out)?? Can they provide you with references from folks who have
purchased new systems from them?? Talk to the local building inspector and
ask him if he would trust these guys to do work in his familys home.
OTOH, if you looking for the lowest price, then all bets are off.
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Posted by dcaster@krl.org on March 6, 2009, 11:30 am
> questions you need to ask are who is going to do a room-by-room manual J
> heat load and loss calc to correctly size the system for your home(there =
is
> no such thing as "rule of thumb").
Talk to the local building inspector and
> ask him if he would trust these guys to do work in his familys home.
> OTOH, if you looking for the lowest price, then all bets are off.
I am also going to be changing out a LPG furnace and air conditioner
for some type of heat pump. Thanks for idea of talking to the
inspection department.
But do I really need a manual J heat load and loss calculation? The
existing furnace seems to be sized about right. It takes a fair
amount of time to bring up the heat in the morning when the
programmable thermostat says heat is needed. And it has managed to
keep the house warm during some near record cold snaps. So I do not
think it is either oversized or undersized.
Do not know about the air conditioning sizing yet, as I have not been
here during any hot weather, but expect to know by next fall.
I do figure I will need some calculations on duct sizing since a heat
pump does not supply air that is a hot as a furnace.
=20
Dan
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Posted by Noon-Air on March 6, 2009, 12:34 pm
> questions you need to ask are who is going to do a room-by-room manual J
> heat load and loss calc to correctly size the system for your home(there
> is
> no such thing as "rule of thumb").
Talk to the local building inspector and
> ask him if he would trust these guys to do work in his familys home.
> OTOH, if you looking for the lowest price, then all bets are off.
I am also going to be changing out a LPG furnace and air conditioner
for some type of heat pump. Thanks for idea of talking to the
inspection department.
But do I really need a manual J heat load and loss calculation? The
existing furnace seems to be sized about right. It takes a fair
amount of time to bring up the heat in the morning when the
programmable thermostat says heat is needed. And it has managed to
keep the house warm during some near record cold snaps. So I do not
think it is either oversized or undersized.
Do not know about the air conditioning sizing yet, as I have not been
here during any hot weather, but expect to know by next fall.
I do figure I will need some calculations on duct sizing since a heat
pump does not supply air that is a hot as a furnace.
Dan
You will still need the Manual J calcs, as well as the manual D to insure
that everything *IS* correctly sized. if the current furnace is still
cycling on and off during the very coldest days, it is probably oversized.
Unless you do the math, your only guessing.
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Posted by designwebs on March 6, 2009, 2:05 pm
> >I have a coupls guys come out and give me est. on our 15 year old heat
> > pump/ Air Condintioning system. =A0They have suggested or should I say
> > try to sell us Maytag, Tempstar and Goodman systems. =A0For the pros. o=
n
> > the list what can you all say about these units.
> http://www.consumerreports.org/cro/appliances/heating-cooling-and-air...
> questions you need to ask are who is going to do a room-by-room manual J
> heat load and loss calc to correctly size the system for your home(there =
is
> no such thing as "rule of thumb"). Who is going to be there when the syst=
em
> needs service?? Does the system have R410a refrigerant in it(R22 is being
> phased out)?? Can they provide you with references from folks who have
> purchased new systems from them?? Talk to the local building inspector an=
d
> ask him if he would trust these guys to do work in his familys home.
> OTOH, if you looking for the lowest price, then all bets are off.
Thanks for the reply. This guy is all over our area. My neighbor has
him and they have not any problems with his company. When we fist
moved into to our house 15 hrs ago he came out and looked and measured
all the rooms.
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> pump/ Air Condintioning system. They have suggested or should I say
> try to sell us Maytag, Tempstar and Goodman systems. For the pros. on
> the list what can you all say about these units.