Hot water storage tank
We are getting quotes for replacing the original 1978 Super Hot gas boiler in my parent’s house. Located in Fort Erie Ontario. It’s across the river from Buffalo NY.
I have searched and read all posts dealing with Baxi (few) and WM (many) and other boilers as well. There is a wealth of information that I loved running through.
The house in 1100 sf on main floor raised ranch. 3 bedrooms on mainfloor and one possible in the basement. The full basement is heated as well. Walls are 6” with pink fibreglass and the ceiling has R50 now thou it was R28 originally on main floor. The basement has 8” pink on the top 4 ft and 4” pink on the bottom 4 ft. Floor is not insulated just tiled.
Slantfin copper ¾” baseboard rads on two loops. One loop per floor.
Super Hot 135000 input 108000 output.
Hot water heater 40 gals. The hot water heater is about 9 yrs old.
Kitchen, laundry and 2 baths.
Based upon my reading other posts Outdoor Reset is a big plus. What we are wondering is whether an Indirect Water Heater would be required or not. Although just my parents live in the house currently, would the hot water supply be enough. When they have relatives over, it tends to be 3 – 4 more persons and for 1 to 4 weeks at a time for 2 – 3 times a year. One contractor verses another believes that a storage tank will be a better option. How do people that take baths vs showers affect your choice, if at all?
Both contractors we know through past usage either in our homes or at place of business. Either are acceptable to us, been in the industry for over 30 yrs. They both use Baxi and Weil-Mclain.
Baxi HT 380 Condensing combination central heating and on-demand domestic hot water boiler.
Weil Mclain Ultra UG80 with Ultra Plus 40 indirect water heater.
Parents are looking for a good system that will be trouble free until the end. With the government grants that are in effect my dad likes to step up to a new system. A good part will be paid by rebates and grants. It has been on his mind about the age of the current boiler.
No experience with the Baxi.
With the WM Ultra. You won't have trouble keeping up with hot water demands. Weather its just a little amount of hot water, or a large demand(but within normal ratings of boiler).
I have Ultra's installed in apartment complexs. With 80 gallon indirect water heaters.
They supply heat to 12 apartments, along with the hot water for those apartments and a small laundry in apartment building.
Also have the same set up in homes(smaller boiler and indirect).
No problems with handling the hot water demand.
The 155 Ultra can recover roughly 170 gallons an hour, at 100°F rise.
210 gallons at 80°F rise.
The Baxi HT380 claims 3.8 gals / minute w/80 degree rise
And while its doing that. You have no heat.
Double check. But, I believe you'll find, if your drawing 1 GPH of hot water, you have no heat until you stop drawing.
Which is one of the reasons they also sell indirects for it.
PS: If you tap max draw on the Ultra you woldn't have heat either.
But, at 2GPM you would have heat.
150,000 useful BTU/hr. to do this.
Originally Posted by piaras
Triangle Tube makes nice indirect domestic water heaters.
Yes they do. I like to install them with a nice WM Ultra.
Originally Posted by james80031
It seems that a storage tank will likely be a good thing. In my experience in cooling equipment from extreme high temps (+2000F) that a tank gives a buffer against rapid temp changes. That means that the water chiller does not have to operate for a period of time until the set point is reached.
The house does not cool that quickly in the winter. The thermostat now set back at 11pm and the currently boiler will refire usually around 1am after a 5F drop.
Beenthere - You are right. Both units will prioritize the Hot water heater loop when there is a draw.
I like the Weil-Mclain but I am not choosing the contractor or footing the bill.
Thanks for your responses.
Are Weil-Mclain tanks the same manufacture as Triangle Tube?
I ask as the literature on both web sites are indentical!!