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Old 04-26-2012, 10:22 PM   #1
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Convert to Hydro-Air?


We live in a 1927 house with cast-iron hot water radiators and brand new high efficiency boiler with indirect hot water heater. We are planning to install conventional ducts for central air. It turns out that for another $1,000 we can also remove our radiators and convert to hydro-air. Should we do it?

Here's my list of pro /cons. Any others we didn't think of?

Pros:
- Will get heat in all bathrooms (currently we don't have a radiators in the 1st floor half bath and the radiators in the 2nd floor baths do not seem to heat up)
- Give space for better furniture placement
- When we return home from ski trips the heat will come on quicker (now it takes an hour for the house to become warm)
- Hope the temperature will be more even, now when the radiators heat up their hold on to the heat which makes the house warmer then we'd like
- Solve the heat issue when plan for a kitchen remodel (the radiator is built in wall which we plan to remove)
- Removing radiator pipes in the basement will allow us to finish the space with good headroom
- Adding zones - now we are on one zone and with the hydro-air we are planning to get two systems with one from basement to first floor and the other in attic to second and third floor

Cons:
- Dryer air (with a humidifier, does hydro-air feel more dry than radiators?)
- Noise (should we assume it's noisier?)
- We have a system that work and concerned about installing something that doesn't work for some reason
- Carpentry work - we'll have to fix the floor and paint (something we plan to do on our own and we already have all the paint)

What are your thoughts regarding hydro-air from the perspective of comfort, cost of operating, and maintenance? Thanks!

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Old 04-27-2012, 12:57 AM   #2
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Convert to Hydro-Air?


http://www.boucherenergy.com/hydro/

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Old 04-27-2012, 09:11 PM   #3
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Convert to Hydro-Air?


Its seems that most information online address the idea that hydro-air is better than forced air. I'd love to hear feedback comparing hydro-air and hot water cast-iron radiators.
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Old 04-27-2012, 10:38 PM   #4
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Convert to Hydro-Air?


Cast iron rads is a more consistent heat. Hydro air is on off.
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Old 04-28-2012, 06:37 AM   #5
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Convert to Hydro-Air?


Does that mean the temperature with hydro is more likely to stay consistent? One issue with radiators is that they stay hot for a very long time which heats up the house to a higher temp then we'd like. For example, our thermistat is at 71 and it gets chilli right at 70 when they turn on then the boiler turns off at 72 but the house heats up to 74. Would hydro solve this issue?
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Old 04-28-2012, 06:49 AM   #6
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Convert to Hydro-Air?


Quote:
Originally Posted by alisanke View Post
Does that mean the temperature with hydro is more likely to stay consistent? One issue with radiators is that they stay hot for a very long time which heats up the house to a higher temp then we'd like. For example, our thermistat is at 71 and it gets chilli right at 70 when they turn on then the boiler turns off at 72 but the house heats up to 74. Would hydro solve this issue?
No it wouldn't necessarily fix that. thats more of a problem of the thermostat, and boiler not being set up right.

Many people become chilly as soon as the blower shuts off on a hydro air, and end up tuning the thermostat higher.

A better thermostat would correct some of your temp and chilly feeling problem,. And your boilers aquastat being reset to the proper temp for rads would take care of the rest of your over shoot problem.

The rads saying hot/warm for a long time is why they are a m ore constant heat. Too high of a water temp is the reason for the over shoot of thermostat set temp.

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