Joined on January 15, 2012
Last Post on March 4, 2014
@ March 4, 2014 3:21 PM in geothermal vs. airsourceIf most of the time weather isn't too extreme what is the advantage of geothermal? But if I live where there's 2000 hours of bitter cold and another 2000 hours of scorching heat and electricity is expensive,then .....
@ March 4, 2014 2:55 PM in Anyone buy 4 year old boilers?I used to acquire used boilers cheap to rent them. Business conditions have changed.
@ March 3, 2014 1:53 PM in questions to ask for new boiler quote?Make certain quote includes removal of old one.
@ March 3, 2014 1:49 PM in Waterlogged Compression tanksSomehow hydronic systems breath. When they lose air PRV feeds additional water. Shut off makeup water and see how soon pressure drops. I prefer gas over water expansion tanks. Here's an idea to consider. First make certain that automatic air vent operates properly, that is it doesn't pass liquid. Then connect outlet from the vent to expansion tank. You can use small flexible tubing.
@ March 2, 2014 1:52 PM in Solar Thermal is DeadWorld of difference between common solar collectors and machinery that concentrates sunshine to produce high temperatures like those big solar thermal electric projects. You can buy parabolic trough type. Now you have to decide what to do with that high grade energy. Seems to me that conventional energy is so inexpensive in North America is why we don't see solar thermal being widely installed.
I would suppose that concentrated solar thermal would be most practical in remote places where diesel and heating fuel are expensive.
@ March 1, 2014 1:27 PM in Pickup factor. Help me understandMaybe boiler has to be over sized because it has to remove air from heating system. On multi-residential building where boiler was replaced with a train of small boilers, and with mechanized venting, heating season began with only one small boiler fired up.
@ March 1, 2014 1:16 PM in Beating a dead horse.If an oil fired boiler receives a significant amount of heat by radiation, then does it require a higher BTU gas burner?
@ February 27, 2014 2:58 PM in Will boiler/pump still work if both zone valves are closed?I've worked for many landlords. In virtually all cases the majority of tenants get along with their landlord. A small minority wants to fight rather than discuss.
Seven hours per day is too much. But a pleasant temperature for night time sleeping is below legal.
@ February 25, 2014 10:12 PM in Gasoline from Natural Gas?In the seventies New Zealand had to import petroleum but it had natural gas. Several methods to replace petroleum with natural gas were studied. Most efficient was to convert gasoline engines to run on compressed NG. Next was to use LNG. Then the NG can be partially burnt to produce methanol and engines can be modified to use that fuel. Finally there's the least energy efficient way. That is to convert the methanol to gasoline. After due consideration the government chose the last scheme. With NG at sixty cents per therm and gasoline at well over two dollars per therm it probably makes economic sense to convert NG to gasoline.
@ February 8, 2014 6:45 PM in Brown Vari Vac SystemWater pressure was high,water in winter was cold, and best of all water was cheap. A water motivated ejector was inexpensive and foolproof. Now that water is expensive, a compressed air powered ejector is still foolproof. Suppliers are Fox,Penberthy,S&K, and others.
@ February 7, 2014 4:36 PM in Modine HW Unit in GarageControl the fan with a thermostat. How much heat does a unit heater lose with fan off?
Draining & re filling have negatives.
@ February 4, 2014 4:06 PM in Pipe slopeThis thread shows why steam heat became a lost art. A steam heated building ideally is designed to accomodate the heating system. Extra pitch helps a lot.
@ February 3, 2014 3:08 PM in conversionCoils I've seen can be piped for steam or hw. Zone valves make steam less simple. I'd try to eliminate pumps. OTOH if the condensate pump is really pumping hot water through that duct coil it sounds like a brilliant design.
@ February 3, 2014 2:01 PM in Orifice PlatesI always figured upper floor got more flow because the column of cooled water in return weighs more? Oddly enough, in old three storey homes the middle floor was coldest.
@ February 2, 2014 6:56 PM in Orifice PlatesJust make sure those valves are up to throttling duty. That means no water gets past packing.
@ January 30, 2014 3:43 PM in radiant heat in attached garageI strongly agree with kcopp. Simpler,cheaper. You'll probably operate the heater at coolest setting. With recirculated water the heater will probably last longer than the house. Plus you save pressure drop through exchanger.
@ January 29, 2014 5:24 PM in South CarolinaOften somebody passes 18 wheeler and then brakes hard. Happily drives on leaving jack-knifed behind.
@ January 29, 2014 5:21 PM in thinking of electric boilerI especially like low wattage oil filled.
@ January 29, 2014 1:36 PM in radiant heat in attached garageI presume the heat exchanger will have circulators on both sides? All just to heat a garage?
@ January 29, 2014 1:29 PM in Steam, Its Generation and Use (Babcock & Wilcox)Quality of scanned stuff is so variable. You'd think with today's technology computers could automatically enhance optimally. This site has excellent scans.
I'm going to check out Babcock. If it's any good I'll give my hard copy away.
@ January 29, 2014 1:24 PM in new burner for old boiler?We aren't supposed to talk money but these days the questions are:
Is reconditioning the burner much cheaper than installing a new burner?
Is a new burner as good as the oldie but goodie?
Is installing a new burner much cheaper than installing a new boiler?
Is a new boiler as good as an old one?
The answers may depend on time frame.
@ January 29, 2014 1:16 PM in The cobblers children.....When she calls you have to do it. Otherwise, what's the difference two hundred years from now?
Do auto mechanics ever service their own car?