Alan (California Radiant) Forbes
Joined on August 14, 2009
Last Post on April 23, 2014
@ March 11, 2010 1:27 AM in cutting copper tubing with shearsBut the movie clip on Youtube pits the tool against a minicutter. Minicutters are slow; why not put it up (legitimately) against a regular tubing cutter? Kind of lame.
@ March 9, 2010 9:48 PM in Re-piping JobNice work, Bob. Looks like you made many improvements to her system and she will be enjoying a quality heating system for years to come.
My only comments - if you don't mind me saying so and these are just my personal preference - are that I would have used cast fittings instead of malleable and I would have used a bullhead tee at the take-off and brought the 3" main down to it. It would have slowed down the steam a bit more.
I like the fact that you took extra time to install a drop header.
@ March 8, 2010 12:12 PM in Thermostat or not?the boiler is perfectly sized to the heat loss of the building, you need a thermostat. Without the thermostat, the boiler has no way of knowing how warm it is inside the building. Without the thermostat, the rooms will overheat.
The heat loss of the building is dynamic; low heat loss when outdoor temperatures are mild and a high heat loss when it's freezing outside and the thermostat (in your case) is the only way the boiler knows what it's like out there.
@ March 8, 2010 11:23 AM in Bradfordwhite combicoreAll the ones I have installed have failed; typically at the heat exchanger. Others have had the same experience. It may be the water, it may be the heat exchanger material, but I don't use them anymore.
@ March 8, 2010 11:15 AM in flooded radiatorsOne-pipe steam is meant to work at very low pressures; that is why the pipes are so large. Many of your Mother's problem will go away once the pressure is set properly.
Pressuretrol should operate between .5 and 1.5.
Vaporstat should operate between 4 oz.and 10 oz.
@ March 5, 2010 4:16 PM in Water Heater for Slab HeatIf you have a water heater dedicated to the radiant slab, i.e. no DHW, then you don't need a HX.
@ March 5, 2010 3:42 PM in I need a computer program for PEX tubing layoutsis an excellent product. When you load the program, it will ask you if you want to check for new versions. The upgrades are free and I look forward to downloading the new one on Monday.
@ March 4, 2010 9:18 PM in Just curious about atmospherics,,,,the requirements rearding low-nox boilers?
@ March 4, 2010 7:32 PM in Can you recomend a simple, reliable boiler?Maybe most ModCons, but the Prestige is very simple, straightforward, easy to set up and very reliable. It's perfect for radiant because it loves low return water temperatures. If you go with an atmospheric boiler, you've got to make sure it DOES NOT condense.
If push comes to shove, I like the Viessmann ECDS atmospheric boiler. If you wire the primary pump through the boiler, the boiler will turn off the pump below 130° (I believe) for boiler protection.
@ March 4, 2010 3:31 PM in Can you recomend a simple, reliable boiler?Prestige Solo 110 made by Triangle Tube
and if you want to get rid of the indirect tank, the Prestige Excellence will provide a limited amount of DHW. It has a 19 gallon DHW tank that has a decent recovery rate. It's the only combi boiler that I recommend.
@ March 4, 2010 1:00 PM in You Go Girlthey catch on. Most people hate sitting on public toilets.
I like the car.
@ March 3, 2010 1:09 PM in ThermsAround here (SF Bay Area) the heat loss for a tight house is around 17 BTU/sq. ft. So:
1,200 sq. ft. x 17 BTU/sq. ft. = 20,400 BTU/hr.
1 Therm = 100,000 BTU
20,400 BTU divided by 100,000 BTU = .20 Therms per hour
Of course, this is an approximation and the 17 BTU/sq.ft. heat loss is typical for a house being heated to 68°; at 55°, you will use much less fuel. For a more accurate calculation, you will need a heat loss survey for your particular house at design conditions.
@ March 2, 2010 11:16 AM in Reversing the flow of an old loop systemI remember Dan mentioning a German radiator installation. It was in a commercial building and for some reason, they circulated the water one direction for a few hours and then the other direction for a few hours to even out the heat.
@ March 1, 2010 7:06 PM in Tsunami Watch - OTAfter hearing about the Chilean earthquake, a few of my friends and I went out just beyond the Golden Gate to try to get a peak at the tsunami that was supposed to come in. Scheduled to hit at 1:26 pm, nothing came in and we had to settle for a beautiful day at the coast.
@ February 25, 2010 12:17 PM in Gravity System: Appreciate AdviceThe easy part is that your main header will be 2½" for a 20° delta T. As for sizing the separate zones, you will need to have some idea of the BTU's of the connected load.
You have 3 branch mains. One zone will supply one branch and the other zone will supply the other two branches. All the returns will combine. Is it that easy?
@ February 21, 2010 4:11 PM in Improper pipingWhoever installed that boiler disregarded the instructions. Very few things were done correctly.
To answer your questions, it may not necessarily shorten the life of the boiler, but it won't be the quality system it could have been. Costly? Yes. You almost have to start over again.
@ February 10, 2010 12:38 PM in Would Love to See Thisprice it around $2,800. Ooops, we're not supposed to talk money here.
@ February 8, 2010 5:11 PM in System leaking but no signs of water.Have you checked the relief valve drain? If the expansion tank is compromised, you will get the symptom of loosing water during operation.
@ February 8, 2010 1:19 PM in 150 controller and short cyclingPost your question in the "Strictly Steam" forum. You may get more replies if you re-word your query to be less confrontational, i.e. leave out the oil company.
@ February 5, 2010 12:26 AM in Can Old & New Hot Water Systems Be Combined?keep us informed and take lots of pictures.
All the best,