What is the difference in performance of an Aprilaire 600 and a 700. I told
my contractor that I wanted a 700 installed. I checked the furnace this
evening and found that a 600 was installed instead of the 700 that I wanted.
I have a 2700 sq ft ranch home. Should I complain about it?
Thanks for your opinions.
Performance wise they are very close to the same, so close it is not worth
mentioning. The big differance is price. The 700 is a powered humidifier,
more money. The 600 is a bypass humidifier, less money than the 700. Which
did you pay for?
There is a big problem here.
First, did you get anything in writing?
Secondly, did you just tell them to put it in without any idea what the cost will be?
If they gave you an estimate, then you should deduct the difference in the humidifier
costs. The 700 costs almost double in price for the humidifier and an electrical
must be run for power as well if there isn't one near by.
If you think you may be getting taken, have another relative with a different name
and get prices for both installed and see if they ripped you off. OR, wait for the
and see if they have listed a 700 or 600. If they have a 700 on the invoice and the
is reasonable, have them come out and change it or the price on the invoice.
Never get something done without an estimate unless price is no option. Maybe the
contractor knows as I do that difference between the two doesn't justify the extra
As a matter of fact, the 700 costs more to run with the electric fan and most of them
don't work well on existing furnaces because the duct is poorly designed and they
have too much static.I have two 700's in my home and I don't like them. Experience has
taught me to use the 600 whenever possible.
Maybe, compared to more air sealing (caulk, etc.) and some green plants.
Humidifiers are expensive to operate in air-leaky houses in cold climates,
counting the space heating energy needed to evaporate water.
If you don't like green plants, you might use a humidistat and a solenoid
valve from an old washing machine and a soaker hose on the basement floor.
And maybe add a dehumidifier (a heat pump with a cop of about 1.6) upstairs,
in a house with electric resistance heating.
Herbach and Rademan (800) 848-8001 http://www.herbach.com sell a $4.95
Navy surplus humidistat, item number TM89HVC5203, with a 20-80% range,
a 3-6% differential, and a 7.5A 125V switch that can be wired to open
or close on humidity rise.
What's the issue with duct/static about? I have a 700 in a 3500 sq ft
home and it works perfectly. I chose it for two reasons. First, it
doesn't decrease the furnace blower capacity by bypassing air around
it. And second, with the 700, the water is introduced as the hot air
is leaving the furnace. With bypass models like the 600, the water is
introduced through the cold side, meaning you now have hot moist air
running directly through the heat exchanger of the furnace, which
sounds like a good way to create rust.
Also, the 700 has an outside air temp sensor that backs off the
humidity as the outside temp decreases. I don't think the 600 has the
I have two 700's in my home and I don't like them.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.