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Tim's Forum Posts: 35

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By Tim in Philomont, VA on 12/1/2002


A great alternative to paying full price for your HVAC system is to go with a mini duct hi-velocity system. It is very easy to install, is 30% more efficient than a conventional forced air system, and runs off of hydraulic (hot water) heat coils instead of flame "scorched air" as some call it. The advantage is that your air won't dry out from the flame but will retain its inherent humidity. The high velocity airflow provides better air circulation in each room with a vent, and it's quieter since the ducts are smaller and insulated. Check out the web site (see below) for more info. The company that I found to offer the best price (there are three- E.S.P., Unico, and SpacePak) and doesn't insist on having a certified contractor do the installation is E.S.P.; Energy Saving Products. Their web site is hi-velocity.com, and yes, they're in Canada. E.S.P. had the best prices, and I find I am saving about 30-50% compared to prices for conventional HVAC systems.
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By Jason in Geneva, IL on 2/26/2003


Another way to save is to install a dual zone HVAC damper system. Control units run about $190 for a two zone system plus two power dampers that run about $80 each. The system will send heat or condensed air to the zone that needs it. Another great option is a recycler that will pull extra heat from upstairs and send it to the first floor to efficiently warm the first floor without burning gas.
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By Jeff in Hampton, VA on 2/27/2003


Alright Jason, you got me hooked. Where can I find out more about the type systems you are referring to. Jeff
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By Connie in Syracuse, UT on 4/13/2003


Jason, So is this the next best thing to radiant heat? This sounds like a regular system with climate control for each area? Is HVAC something you need to know a lot about to do yourself? Just curious about the system... radiant heat was a budget buster.. Thanks Connie
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By Bryan in Goodyear, AZ on 8/3/2003


I am also considering self installing ESP system. Do you still recommend system? Who did your Heat Loss Analysis?
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By Steve on 11/30/2003


Greetings Timothy - we too are in Virginia. Did you get the air conditioning option on your E.S.P. system - if so, how did it work? Also, what boiler did you use? We're looking at doing central heat/air conditioner in the immediate future, and are trying to find out what we need to know. Thanks.
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By Gerry on 12/19/2003


I am looking for info on zone or extra blower systems. My attic- based forced air and natural gas furnace does not successfully heat the downstairs floor. I need to understand what is better: zone dampers with 2 thermostats, or adding an extra blower, or ?? Thanks/ Gerry
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By Gerry on 12/19/2003


To Jason: I am trying to understand the difference in performance between zone dampers with 2 thermostats, compared with simply adding an extra blower on the furnace, in order to heat the first level, from the forced air furnace mounted in the crawl space above the second (top) floor. Any info you could help me with would be much appreciated. Thanks/ Gerry
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By Gary in Kingston, NY on 8/25/2005


The real brain work in sizing the heat and air conditioning is the thermal loss and flow rates for the individual rooms.
I would use a computer as my most popular tool for the design phase of a home...

I found a neat analysis program on the web at hvaccalc.com/main.asp
Looks like they even have a version that will run on a Palm Pilot.
The program can be licensed for single home or multiple jobs.

Seems like there should be some kind of slide rule thingy out there to show flow rates for a particular standard duct size. That would be handy to have, and the only thing I needed to help make a materials list after doing the heat loss calcs.

Regards,
Gary Graham


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