Right Sizing a New Boiler... the easy way

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Language: en

00:00:03.130
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00:00:06.130 00:00:06.140 welcome to TC - hi my name is Bill
00:00:09.230 00:00:09.240 Bailey and my hydronic specialist here
00:00:11.030 00:00:11.040 at Tec since about 2004 today what we
00:00:14.419 00:00:14.429 want to talk about is how to right-size
00:00:16.820 00:00:16.830 a boiler probably most you know almost
00:00:20.330 00:00:20.340 all the Oilers out in the world right
00:00:22.189 00:00:22.199 now are oversized that's not good for
00:00:25.070 00:00:25.080 any piece of equipment as we all know
00:00:27.080 00:00:27.090 equipment runs the best when it's off
00:00:29.509 00:00:29.519 it's the most energy efficient runs also
00:00:33.200 00:00:33.210 very well when it's always running
00:00:35.270 00:00:35.280 it's always add some steady-state
00:00:37.400 00:00:37.410 efficiency the worst is when it's
00:00:39.770 00:00:39.780 cycling that add off and off psycho
00:00:42.350 00:00:42.360 Hertz any major piece of equipment
00:00:44.680 00:00:44.690 including boilers so today we want to
00:00:47.299 00:00:47.309 talk to you about how to right-size that
00:00:49.549 00:00:49.559 boiler for the customer to make sure
00:00:52.010 00:00:52.020 you're giving him a high quality piece
00:00:53.569 00:00:53.579 of equipment that will last long time
00:00:55.850 00:00:55.860 perform the way it's supposed to be so
00:00:59.150 00:00:59.160 let's get into how do we great size dis
00:01:01.849 00:01:01.859 equipment what's on a tag well there's
00:01:05.509 00:01:05.519 two numbers were really concerned about
00:01:06.890 00:01:06.900 the first one being the input on this
00:01:10.100 00:01:10.110 boiler the inputs a hundred thousand
00:01:12.050 00:01:12.060 BTUs that's basically ten is how much
00:01:14.210 00:01:14.220 gas this boiler can consume the next
00:01:18.469 00:01:18.479 number is the do a heating capacity this
00:01:21.080 00:01:21.090 is just a calculation by the government
00:01:22.940 00:01:22.950 that's basically stating that this
00:01:24.530 00:01:24.540 boiler manufacturer claims is 83 percent
00:01:27.440 00:01:27.450 efficient times 100,000 BTUs
00:01:30.679 00:01:30.689 DLE says the maximum output we can get
00:01:33.380 00:01:33.390 out of those boilers 83,000 BTUs that's
00:01:36.469 00:01:36.479 a usable number going to our radiators
00:01:38.899 00:01:38.909 baseboard and whatever the third number
00:01:41.690 00:01:41.700 out here you'll see a lot of times is we
00:01:43.039 00:01:43.049 call the I be our number this is just a
00:01:45.380 00:01:45.390 number from way back but basically
00:01:47.200 00:01:47.210 compensated for uninsulated pipes in the
00:01:49.999 00:01:50.009 basement crawlspace or whatever the
00:01:53.149 00:01:53.159 biggest thing we're looking at the tag
00:01:54.770 00:01:54.780 is you are repeating the mistakes of the
00:01:57.410 00:01:57.420 past this is what we're talking one
00:01:59.719 00:01:59.729 boiler oversize so if you use this
00:02:01.490 00:02:01.500 number you're not right sizing that
00:02:05.240 00:02:05.250 boiler for the customer or for yourself
00:02:08.440 00:02:08.450 calculating baseboard this is probably
00:02:10.940 00:02:10.950 easiest of all the heat emitters we're
00:02:12.650 00:02:12.660 going to
00:02:13.309 00:02:13.319 today I just need a few simple tools
00:02:16.220 00:02:16.230 tape measure flashlight and for us older
00:02:21.800 00:02:21.810 guys a nice little mirror so we can look
00:02:23.569 00:02:23.579 underneath the baseboard and see how
00:02:25.190 00:02:25.200 much thin tube we actually have the
00:02:27.920 00:02:27.930 thing with baseboard is we're really not
00:02:29.599 00:02:29.609 concerned about the link to the cover
00:02:31.160 00:02:31.170 yes it's there it's part of the equation
00:02:33.349 00:02:33.359 but the true heat emitter in baseboard
00:02:37.929 00:02:37.939 the actual thing - this is what we
00:02:41.390 00:02:41.400 really want to know this is what we need
00:02:43.970 00:02:43.980 for our calculation right we might have
00:02:47.300 00:02:47.310 25 26 feet of cover or we'll have 10
00:02:50.839 00:02:50.849 feet of thin tube this is the
00:02:54.409 00:02:54.419 calculation you want you want to know
00:02:56.119 00:02:56.129 this 10 feet those other 16 or 17 feet
00:02:59.300 00:02:59.310 at very little to the calculation we
00:03:02.059 00:03:02.069 want to know about this 10 feet of into
00:03:03.860 00:03:03.870 an average typical residential baseboard
00:03:07.039 00:03:07.049 like this will give you a 550 to 600
00:03:10.280 00:03:10.290 BTUs output all right when you start
00:03:12.890 00:03:12.900 looking at larger stuff more like
00:03:15.619 00:03:15.629 commercial you're gonna be looking at a
00:03:18.770 00:03:18.780 bigger fin as you can see that's a lot
00:03:22.550 00:03:22.560 different from there it's gonna put out
00:03:24.170 00:03:24.180 a lot more heat
00:03:25.610 00:03:25.620 okay curious it follows the same rule we
00:03:28.039 00:03:28.049 only wanna know how much of this is in
00:03:29.960 00:03:29.970 here to do our calculations with the
00:03:32.599 00:03:32.609 larger stuff you want to look up the
00:03:34.129 00:03:34.139 manufacturer and find out what they're
00:03:36.559 00:03:36.569 rated output curve what a fin is
00:03:39.500 00:03:39.510 actually truly the calculation number
00:03:42.110 00:03:42.120 you need calculating radiators this
00:03:47.030 00:03:47.040 always seems to be a little more
00:03:48.140 00:03:48.150 mysterious but it really isn't we're
00:03:50.899 00:03:50.909 going to need a couple measurements and
00:03:52.909 00:03:52.919 then we're going to go to a chart this
00:03:54.559 00:03:54.569 charts been around for a long time so
00:03:56.270 00:03:56.280 pick you're gonna see is a little fuzzy
00:03:57.800 00:03:57.810 but radiators you haven't changed that
00:04:00.080 00:04:00.090 much first thing we need to know is
00:04:02.809 00:04:02.819 basically the height of the radiator to
00:04:04.580 00:04:04.590 do that so we'll take measures we're
00:04:07.039 00:04:07.049 going to the bottom foot of the radiator
00:04:09.319 00:04:09.329 to the top of the radiator
00:04:11.030 00:04:11.040 this application is about 30 inches the
00:04:14.360 00:04:14.370 next thing we're going to be looking at
00:04:15.710 00:04:15.720 looking for is how many columns are on
00:04:18.860 00:04:18.870 that radiator this application we have
00:04:21.680 00:04:21.690 three columns now we take that
00:04:23.930 00:04:23.940 information 30 inches high
00:04:26.620 00:04:26.630 on three columns go to our chart and the
00:04:30.610 00:04:30.620 chart will tell us let's say number five
00:04:32.740 00:04:32.750 this application bet five refers to DDR
00:04:36.850 00:04:36.860 equivalent direct radiation what that
00:04:39.970 00:04:39.980 really means is if you were to take this
00:04:41.670 00:04:41.680 column this piece here and lay it out
00:04:45.760 00:04:45.770 flat you'd have five square feet of
00:04:49.170 00:04:49.180 radiation all right so that's what this
00:04:52.030 00:04:52.040 can give on this radiator three sections
00:04:58.170 00:04:58.180 so now we take that five square feet
00:05:01.200 00:05:01.210 times the three sections that means this
00:05:04.240 00:05:04.250 radiator has 15 square feet of radiation
00:05:09.000 00:05:09.010 the chart will tell us that and a common
00:05:14.170 00:05:14.180 fact in the hydraulic industry is each
00:05:16.870 00:05:16.880 square foot will give you a hundred and
00:05:19.660 00:05:19.670 seventy B choose output at 180 degree
00:05:22.660 00:05:22.670 water temperature they're all standards
00:05:24.730 00:05:24.740 in the industry so take out your little
00:05:27.250 00:05:27.260 calculator do a little math you take
00:05:30.340 00:05:30.350 that 170 times 15 and you'll find this
00:05:34.720 00:05:34.730 radiator would put out a maximum of
00:05:38.670 00:05:38.680 2,550 BTUs per hour that's all can't put
00:05:43.270 00:05:43.280 out three thousand it could only put out
00:05:45.430 00:05:45.440 two thousand five hundred and fifty at
00:05:47.680 00:05:47.690 180 degree water temperature do that all
00:05:50.950 00:05:50.960 the rest of the radiation building add
00:05:52.900 00:05:52.910 them all up now you know the total b2
00:05:55.450 00:05:55.460 loss the b2 output with that about of
00:05:59.200 00:05:59.210 all the radiators in that residence
00:06:02.400 00:06:02.410 calculating radiant floor this is
00:06:04.930 00:06:04.940 probably the easiest the different
00:06:07.210 00:06:07.220 terminal units were really talking about
00:06:08.740 00:06:08.750 in our cutaway here we show you
00:06:10.930 00:06:10.940 different spacing here you don't have to
00:06:13.480 00:06:13.490 worry about that when you're doing the
00:06:14.560 00:06:14.570 calculations okay gotta remember that no
00:06:18.130 00:06:18.140 matter how time we make the tube the
00:06:19.960 00:06:19.970 radiators really the concrete that's
00:06:22.960 00:06:22.970 what's putting the heat up that's the
00:06:25.030 00:06:25.040 heat emitter typical kind of creative
00:06:27.700 00:06:27.710 applications residentially about the max
00:06:30.550 00:06:30.560 B to you you can get out per square foot
00:06:32.590 00:06:32.600 of concrete about 40 beats user square
00:06:35.350 00:06:35.360 foot so our little mock-up here
00:06:37.810 00:06:37.820 we've got 24 square feet times 40 which
00:06:40.660 00:06:40.670 means that this floor section here could
00:06:43.510 00:06:43.520 put out 9600 BTUs per hour if this was a
00:06:47.800 00:06:47.810 commercial building our greenhouse the
00:06:51.340 00:06:51.350 masks it really gives about 50 beats use
00:06:53.620 00:06:53.630 a square foot so 50 times our 24 again
00:06:56.500 00:06:56.510 we're looking at about 12,000 BTUs is
00:06:58.930 00:06:58.940 the max output from this radiant floor
00:07:01.290 00:07:01.300 remember it's not the tube it's the
00:07:04.900 00:07:04.910 khaki that is to true heat emitter here
00:07:09.360 00:07:09.370 thanks for joining us they won't plan
00:07:12.220 00:07:12.230 your next boiler job you will right
00:07:13.660 00:07:13.670 sizer this will be more cost-effective
00:07:15.910 00:07:15.920 for you and your bid and more energy
00:07:18.490 00:07:18.500 efficient for you customer in the long
00:07:19.960 00:07:19.970 run thank you
00:07:21.800 00:07:21.810
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Engineering company LOTUS®
Russia, Ekaterinburg, Lunacharskogo street, 240/12

Phone: +7 343 216 77 75

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Russia: +7 343 216 77 75

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