Joined on January 6, 2004
Last Post on July 16, 2014
@ July 16, 2014 7:26 AM in How LongLet's say I have a viable pipe that holds pressure and gives me cool water. What distribution method should I use. I have an existing ducted heat pump & Air handler. What if I put a water coil on the return duct just before the air handler, to pre condition the air. What would the outcome be?
@ July 15, 2014 7:01 AM in How Longis my pipe? Sorry for the double entendre. This is a tangential subject to my thread on radiant cooling. I have an existing 1 1/4 pipe of Polyethelene tubing that runs out of the basement of a nature center. Runs underground to a lake and loops around the bottom of the lake. It used to be connected to a geo thermal heat pump, but someone got rid of it when it turned 25 years old and replaced with residential air source heat pump. ( what a maroon.) I now have two stubs of the tubing sticking out of the basement wall. How can I figure the length and usefulness of this pipe? I would like to use it to supplement the existing cooling which is not cutting the mustard. Thanks
@ July 11, 2014 6:46 PM in Radiant coolingI wasn't clear. It's a man made lake. They filled it with water 25 years ago. Before they did they ran a big long tube which is now at the bottom of the lake. The deepest part of the lake is 60 feet deep.
@ July 11, 2014 7:44 AM in Radiant coolingto do just that. I was thinking of putting an fan coil right in the exhibit area and put a sign on it. Sustainable Air Conditioning. Uses Lake water to cool. We'll have to prove the temp first. It use to support 9 tons of geo. I'll have to prove it viable and temperature worthy first.
@ July 10, 2014 12:41 PM in Radiant coolingI have a loop out running along the bottom of a 250 acre lake installed 25 years ago before the lake was filled in. I'm wondering if the water would be cool enough to use with a fan coil if not some kind of thermal distribution.
@ July 10, 2014 10:16 AM in Radiant coolingYou're a mad scientist and I love it. I have to remark though that that coil is butt ugly. To anyone but a plumber. :) I need something more pleasing to the eye since it will be in a parks nature center and open for view by the public. We have a domed cathedral ceiling with stuffed ducks hanging from strings. What could I hang up there to top off my cooling capacity?
@ July 10, 2014 6:19 AM in Radiant coolingI have an existing wood/ plywood sub floor floor. I was thing it might be better to hang panels up above for the cooling, or even wall panels.
@ July 7, 2014 6:36 PM in Radiant coolingI googled radiant cooling distribution and founds lots of different devices that might fit the bill. It would be nice to hear from someone with experience though. I might just go figure it out and do it. Then I'll be the one with experience.
@ July 7, 2014 8:27 AM in Radiant coolingat one of the Solar Decathalons I went to, Colorado used copper tubing to make a decorative room divider that they ran chilled water through to get the radiant cooling. I remember asking them why there wasnt a drip pan in under. They said the humidity in Colrado was so low they didnt have to deal with it. I remember thinking, "well dont run it here in DC, cuz our humidity is seriously high."
@ July 7, 2014 7:59 AM in Radiant coolingWe have a nature center we take care of and the capacity of the A/C is marginal. It has high dome like ceilings with stuffed ducks hanging from strings as is they are flying. There is a big long picture window with a view of a lake, that lets in a lot of heat. By the end of the hot day with the unit running non stop we can be as high as 82 degrees. Not the end of the world but not great either. We could find a place for a mini split I suppose, but with the windows wrapping around most of the room our options are limited. We have two Poly Ethelene pipes left over from a previous ground source heat pump whose loop is in the lake. The previous People didnt know how to work on it and were askeered of it so they upgraded to residential equipment. What a bunch of maroons. I was thinking of reusing the pipes with a water to water heat pump and find a way to do some radiant cooling. My problem is the distribution side. What could we use tht we could run cool water through to top off our cooling capacity. Use your creative brains Nothing is too outrageous at this point.
@ July 7, 2014 7:25 AM in stupidityIts got to feel great to help out your co worker. I think I'll buy some cold packs for my crew.
@ July 4, 2014 4:26 PM in One of the greatest heating tech' has passed awaychris was a speaker of truth. If something wasn't right, he said so. On the other hand, if he dealt a compliment you knew you should be honored. a good man. gone too soon.
@ June 29, 2014 4:55 PM in ECM circulatorsIt just seems to me they could make one that was not so fancy that you could dial in to the gpm or delta tee you want and then turn a screw to lock it in place. It would cost less but save a lot on operating costs.
@ June 29, 2014 6:34 AM in ECM circulatorsI love all the new variable speed circulators on the market these days, however you don't always need such fancy controls in every situation. Does anyone have a simple circ with ECM motor that you can just set for one gpm? I'm thinking for the purpose of a dedicated circ for the primary side of a boiler loop to a hydraulic separator. That way you could have the lower operating costs of an ECM motor without paying for and on board computer in the circ controls or equivalent.
@ June 29, 2014 6:28 AM in Heat loss on DC rowhouse?Have worked on DC row houses a lot. . Since there are two walls that have no heat loss on either side the boiler does not have to be very big. I usually put in a 60,000 btu modulating condensing boiler and it has plenty of capacity. Any good contractor has heat load software and can do a heat load plenty easy. Dan Foley is one of the best down in Springfield. If you stay with the cast iron boiler you will have to be careful to protect it from the cool water return coming from the radiant floor as it will hurt the cast iron boiler by causing condensation that it is not designed to handle. The near boiler piping will have to be modified to obtain that protection.
@ June 21, 2013 4:36 PM in humidity and temperature recorderSearching the Internet and found something called a HOBO. has anyone used one?
@ June 21, 2013 2:32 PM in humidity and temperature recorderLooking for the latest in temperature and humidity recorders for HVAc monitoring. What's oout there? What do you recommend?
@ May 21, 2013 2:56 PM in Reverse IndirectHot Rod. I found a brand new distributer for Thermomax right down on VA. not far from us. The Joyce Agency has just taken on this product line. Thanks for your help.
@ May 21, 2013 8:23 AM in Reverse IndirectZ man. the thought had crossed my mind. I'm having trouble finding distributers for Thermoax or Ergomax. Did they go out of business?
@ May 20, 2013 12:13 PM in Reverse IndirectI understand what you mean by external. HX. What I'm picturing is like the Thermomax. I need a buffer tank and an indirect but the capacity on the indirect is not very high. Just for hand washing and cleaning crew usage. No showers. I'd love to put the buffer tank and Domestic hot water on a single footprint,
@ May 20, 2013 9:15 AM in Reverse IndirectI remember thinking once that a reverse indirect would make a good buffer tank in the right situation. That was a long time ago, but I think I find myself in the right situation. What brands of reverse indirects are out there these days? Does anyone use these?