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Joined on December 13, 2007

Last Post on April 22, 2014

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@ April 22, 2014 10:19 AM in A little help deciphering.

i believe it is a dinosaur, maybe a stegosaurus.


@ January 4, 2014 10:40 PM in New Lochinvar Knight Questions / Concerns

is that ball valve on the closely spaced tees suppose to be off and are those same pipes that rise first from the close space tees have the black grundfos pump on it?

outdoor reset

@ December 19, 2013 1:59 PM in Latest ODR control

i have used 2 of the taco fuel mizer outdoor resets on older cast iron boilers, both are working well. and the price is reasonable compared to the tekmar

radiant spacing

@ August 15, 2013 11:51 AM in Pex spacing for under floor radiant (joist bay)

i will be the first to say it. you are screwed.

cold temps

@ May 31, 2013 12:21 PM in cold temps

looks like no one wants to take this one on.

interesting article

@ May 13, 2013 6:03 PM in Exporting natural gas looks like a Bad Idea

everyone is wrong trying to predict the future. read the first 2 pages then check out the third page . author and year..

pipe erosion

@ April 25, 2013 6:24 PM in Hot Water Recirculation pipe erosion

we had the same type of problems on the re circulation lines on some of our buildings. pipes leaking and the whole repair and replace. we ended up putting on circuit setters on the lines and also put on strap on aqua stats to shut the pumps down when they hit 120 degrees on the return. the strap on stats are johnson model number A19DAC-1
you don' need to pump a lot of gpm all you need is is a few gallons a min. the pipes started to have erosion problems after about 12 years.

mini split

@ April 23, 2013 5:02 PM in Does anyone make a mini-split with 8 indoor units and 1 each 4-ton heat pump unit, 3-phase?

the mitusubishi city multi that i looked at are the R-2 series and the Y series
the H2i Y series also the S series but it is not 3 phase that i could check

mini split

@ April 23, 2013 4:57 PM in Does anyone make a mini-split with 8 indoor units and 1 each 4-ton heat pump unit, 3-phase?

check the mitusbishi city multi i don't think that it will go down to 4 ton, in the
460 volt 3 phase. i believe the smallest is 6 ton. or is your voltage 208/230 3 phase

outdoor rest

@ April 23, 2013 4:27 PM in Outdoor reset

i just installed a knight wall hung 110 and while reading the instructions on page 53 it stated the united states energy policy and conservation act requires residential boilers with inputs of less than 300,000 btu/hr to be equipped with a control that automatically adjusts boiler water temp in relation to heat demand .

heating a pcb test room

@ April 4, 2013 5:30 PM in Heating a 5 x 10m room to constant 48 degrees

the most simple is electric heat., no flue,no fuel ect. if you have ducting to the rooms already then a duct heater with different stages kw to keep the temp once the room heats up. might not be the most economical to run but the install could be simple. if it is a t-bar ceiling then electric panel heaters maybe.

delta t

@ March 17, 2013 7:32 PM in Delta T issue

gordy i see where you are coming from. the numbers don't add up. He has high supply water temp of 140 degrees and a 37 degree delta t . return water at 103. 140 degree on the 10 loops at 200 feet means he has btu's per square feet way above my calculating pad in the 50 btu an hour plus range. so even with the several hundred feet of missing pex loops he can still heat his main floor ok. to hot for my liking. but the thought is that he is also loosing heat to the basement because of lack of insulation below his slab. just a thought. it would explain the high delta t.. maybe he could see with his laser guided thermometer he could see what the basement ceiling is doing.


@ March 17, 2013 3:53 PM in Delta T issue

gordy your calculations all ad up except you missed one step, and that is the head of the loops. calculated at close to 1.5 feet to 2 feet of head on the 1/2 in pex at 200-300 foot loops off of the manifolds. assuming the longest loop at 300 feet the head would be close to 2 foot of head. the mistake i think everyone has made in this process is that they have added all the head losses together. you don;t add all of them together just take the highest head loss and connected piping loss. now the the flow through each loop you do add all together which ends up being .3 gpm x 5 loops per manifold x 2 manifolds (main floor only) equals the 3 gpm you came up with. I don't know where the 20 foot of head total came from but it is wrong.

mod con

@ March 16, 2013 12:20 AM in Mod-con boiler right choice for in slab radiant shop with full basement and spancrete floor?

when i took the radiant panel association classes from john siegenthaler and others, they emphasized the need to control where the heat output of the panel should go, they gave examples of million dollar homes that had not insulated between floors and then the complaint was the basement was warm even though the tstat was turned way down. radiant heat travels 360 degree, so a large slab main floor that this gentleman is trying to keep 60-65 degrees and the basement at 45 degrees must have insulation or he will have a over heated basement. i have seen it before and it is hard to insulate a finished basement after the fact.


@ March 15, 2013 5:01 PM in Mod-con boiler right choice for in slab radiant shop with full basement and spancrete floor?

the first thing to do is get a heat loss calculation, you then know how many btu to replace on the coldest day. also you will know how much each area will need and the spacing on the radiant loops, sizes ect. The slab in the basement is a easy decision. you have to pour one anyway. install the correct slab and edge insulation. the main span is the same way you have a pour to do. insulate between the basement and the main floor or you will have no control over the basement heat. the loft is easy a couple of lines up to it insulate it also between the main and loft. the mod con is perfect for the high mass low temp situation.

taco fuel mizer

@ February 5, 2013 2:10 AM in Taco FuelMizer

i installed the fuelmizer in the middle of dec. and it has run as advertised. i have noticed the pumps are now running longer which was to be expected. go to the "search the wall at the top of this page. NOT the site search in the top right hand corner, Before you get to green line break. in the middle of the page it says " search the wall", type in "taco fuelmizer" and you will see pictures of my install. If you want to see a video go to "
and go to electronic controls and to fuel mizer they have a video of how to instll and setup the control. paul


@ January 15, 2013 1:36 AM in Failing Gaskets on a Glycol Heating System

we had the same problem on one of our buildings (14 of them ) all built 1989 to 1992 . called victaulic talked to one of the reps and told him of the failures. he said we had done pretty good to get 20 years out of the gaskets and that the gaskets they make now are of better materials and should last a lot longer.

fuel mizer

@ December 19, 2012 5:45 PM in taco fuel mizer

the way i understand the outdoor reset is that the design temp will fire the boiler to the max at 180 degree so if i put the the design temp pot at 30 and it is 30 degrees outside then my boiler will fire to the 180 degree. so if the out door temp was 40 degree then the boiler would only be allowed to run until it hit say 170 degree on the supply temp sensor then because i have it set with the 10 degree td it would fire when the supply water would hit 160 and then fire to 170 again.

taco fuel mizer

@ December 18, 2012 11:19 PM in taco fuel mizer

yes i had the outdoor sensor mounted and it was 30 degrees the day i did the start up. The only thing i changed was the design temp setting on the pot from my original 5 degree set up.
moved it to 30 and that should of put the boiler output to the full 180 degrees. just hung onto the 140 degree which is the minimum boiler setting with the dip switch you can see in the upper left of the picture. bass ackwards. or is my thinking wrong.

taco fuel mizer

@ December 18, 2012 1:45 AM in taco fuel mizer

i just installed the taco fuel mizer SR 501-OR boiler control outdoor reset. It was a pretty straight forward install i hooked it up with the taco SR 504-EXP pump control. I set the dip switches to the settings for minimum boiler temp. which is 140 degrees, and set the pot. at design temp. of 5 degrees. In theory at 5 degrees outside temp. the boiler will go to 180 degrees and on say a 30 degree day the boiler will go to 160 temp. This is where i ran into trouble the boiler would not go above 140 degree temp. I set it at design temp of 30 just to test it out and it still would not budge off of 140 temp. it should of gone to 180. so i ohm the sensors out and they were dead on. then i started to turn the pot to the - 10 degree temp setting and by gum the boiler temp went up to 150 or so then set it at -20 and it went up even more to 160. it seems that i either have a backwards pot or taco has a goof up. If any one has come across this please say so. I would hate to have the only backwards control.


@ November 12, 2012 3:56 PM in AquaHeat Manifold Question

you can put the heat motor actuator on the manifold loops you want to control. you will have to wire the t-stats to bring on the pump / boiler / zone valves. ect.


@ November 9, 2012 1:50 PM in So, we just De-Knuckleheaded nickdu's steam boiler.

i also get the same pictures on each page
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