Radiant Snow Melt System in Markham Totaling 15,000 foot²
The new owner of this mansion in Markham contracted us to install a radiant snow melt system in Markham for his house, from the road all the way to the garage. In itself it is not a novel request except the sheer size of the area being over 15,000 foot². To complicate things, the construction is completed in two distinct phases. First the 11,000 foot² area next to the public road, in front of the giant planter, in front of the house and the steps leading up to the front door, the roadway to the West side of the house to the garages. Once that is up and running the 4,500 foot² road leading from the front of the property to the East side of the house. This meant that we had to install all the supplies and returns to all first and second phase radiant manifolds at once otherwise the slab in front of the house would have been in our way.
Snow melt by the numbers
After laying out the system we decided on 9 manifold locations strategically placed along the slabs. The radiant snow melt system manifolds will be installed in-ground, protected by valve boxes. The heat requirements for the hydronic snow melt are up to a staggering 2.33 MILLION BTUs per hour. To be able meet this demand we decided on 2 x 1,200 MBTUh Laars Mascot Neotherm LC boilers. Each of these beasts will slurp gas from a 2″ supply and belch through 6″ Schedule 636 vents. The system will hold more than 3,000 liters of 50% propylene glycol. There will be two snow melt sensors and controls in place, one in front of the house, the other in front of the garages. We managed to spec all electrical components to be single phase since the house is not 3 phase wired. We will use our own Schuller Radiant Heating Snow Melt Manifolds since they are designed with maximum flow in mind. Not only their trunks are 1-1/4″ but the also the connections to the trunks. We will use SharkBite 3/4″ O² Barrier Tubing laid down on HotRock Panel Insulation. Needless to say this system had to be planned out to the last fitting. The margin for error on a large system like this is zero.
The Boiler Room’s Mechanical Plans
The hydronic radiant snow melt system’s boiler room’s mechanical plans.