Three things to consider. First, as snidely says, the question is what the BTU output of the radiators is in each room. Try to find the specs for what you have by googling online. As an example, page 3 of the following is for Weil McLain cast iron baseboard: http://www.weil-mclain.com/en/assets/pdf/en-snug-072011.pdf . The BTU per hour ratings are given for various water temps, one or two flow rates and per linear foot. For the above example, a 1 foot section of baseboard with 180 degree average water temp will get you 570 BTUs per hour with a 500 pound per hour flow rate. (500 lbs per hour is about 1 gallon per minute (GPM)). You then multiply by the total linear feet or use the table. Page 4 of the following gives similar info for Weil McLain's fin baseboard. http://www.weil-mclain.com/en/assets/pdf/en-hightrim-072011.pdf You'll note that at the same average water temp, the output is 720 BTU/hour for 1 GPM flow rate. For cast iron radiators, it will take a little more tracking down or just use something close. Here's a page with similar info for this brand: http://www.ocsind.com/cast-iron-radiators.php These are given in BTUs per square foot per hour. First you have to calculate the number of square feet of radiator you have by determining the specific model (height) which gives sq. ft. per section, multiply by the number of sections and then multiply by the BTUs per square foot. A 'section' is one vertical rib. It can either be an end section (with feet) or the intermediate sections (in the middle without feet). The value doesn't matter for end or middle section. Given the above, you should be able to determine how many BTUs each room is getting. If the baby's room is similar (size, exposure, etc.) to another room that is warm, you can do a comparison. Second, if the baby's room is the last radiator in the series before the return to the boiler, I'd check what the water temperature coming into the room is. As you can see by the tables, the output is close tied to the water temp. The best way to do that would be an infrared thermometer aimed at the pipe going into and out of the radiator/baseboard. (See link below.) I'd measure the water temp in and out for each room and compare. Use that sample to do your calculations above a second time. As an example of a problem, a relative of mine had all fin-type baseboard. One series loop in their system was the living room and a bedroom. The living room only had baseboard under the picture window. They did a remodel and added baseboard along the other outside living room wall AND added baseboard to the basement, all on the same loop. As a result, the bedroom was much cooler the next winter because of the large temperature drop of the water by the time it got to that room (the bedroom was the last on the loop). Third, the old wives tale (or conventional wisdom) is to not mix cast iron with fin/steel baseboard. The ratings given in the specs are for water flowing given the average water temp. When the boiler/pump shuts off, all bets are off. Cast iron baseboard and radiators have more thermal mass with the iron and with water volume (although they take longer to heat up). The fin baseboard cools off faster and basically just has the pipe running the length full of water. So, there is some basis to your concern. If you find that there is a significant temp drop of the water coming into baby's room, you might see if the plumber can run a separate branch loop to the room from the boiler off the same source manifold (depending on how your zoning is controlled). He could also add a balancing valve to the branch so you could throttle down the flow if needed in case it's too hot in the room. But before changing anything, do the calculations. If there's not enough baseboard based on BTU calculations, you could add more or replace with more cast iron baseboard. It's been a while, but it used to run something like $40 to $50 a foot, plus installation for cast iron baseboard. Hope this gives you a few ideas. Here is a link that might be useful: Infrared thermometers This post was edited by DreamingoftheUP on Sat, Feb 22, 14 at 15:23

You can use a coffee maker to make hot water. Just leave out the coffee. When the water gets hot, the thermostat flips to a keep warm setting. One caveat: Turn the pot off when the water gets low. An electric, thermostatically controlled, tea kettle probably better suits your needs. Years ago, I had a gas range from Sears that had one burner with a sensor - I believe it was marketed as "A burner with a brain". This was a thermostatic device that rested against the bottom of a pan or kettle. It adjusted the flame to maintain a user set temperature. If this was set to 150 F, conceiveably, it would keep the burner from melting the bottom of a kettle if the water boiled away.

I love my RO filter. Most of my out of town relatives who've come to visit have commented on how they like my water, not knowing it was filtered. One small additional benefit with a softener + RO combination is that the RO membrane will last a bit longer than if you feed it "regular" water. My RO is plumbed to the fridge so it can feed the icemaker + water dispenser, and I have a separate spigot at my prep sink. It sounds like you're already doing it, but you'll want to be sure that you run RO water through plastic tubing, not directly in copper pipes. The plastic tubing is normally run inside the copper pipe. Be aware that the RO filter removes fluoride, so if you have kids you might want to talk to your dentist about it. A fluoride toothpaste and fresh fruit should be plenty of fluoride, but talk to your dentist.

You are correct. I misunderstood. I thought you wanted to change the temperature of the heating element. If you want to control the temperature of the water, then you can spend about $20 and get a PID temperature controller. It will control the water temperature to within one degree of accuracy. The system comes with a controller, a SS relay, and a temperature probe. You will need to hook them up into a box. Plug your kettle into the PID system and set the temperature and stick the probe into the kettle. The water will be heated to that exact temperature. With that, you can also do sous vide cooking. dcarch