Items Tagged with 'radiant'

Improper piping sends heated fluid backward through an idle boiler in this hybrid hydronic system.

 Radiant floor heating is expanding rapidly into commercial environments and early-stage project specifications, defying broader housing and remodeling market headwinds through strong “stay-put” renovation and trade labor efficiency trends.

The transition to automated production aims to deliver performance and installation benefits. 

This report analyzes the sales of radiant heating products (by using WarmlyYours sales data as a proxy for the industry as a whole) within the wider context of the national housing and remodeling markets. 

Figure 1 shows a hydronic system that’s intended to supply four panel radiators, each with their own thermostatic radiator valve and an indirect water heater from a gas-fired sectional cast-iron boiler. The system is designed using primary/secondary piping. The primary circulator operates whenever the space heating load or the indirect water heater call for heat. 

The first Blanket of Warmth project was completed in 2018 with two homes. Now, with the grant from the GF Water Foundation via the OneGF Impact Fund, more than a dozen First Nation homes have the Uponor radiant system.

In hydronic systems, the circuit usually passes through the boiler, which adds heat. When using a block heater and the boiler is off, it dissipates heat from the circuit. This heat loss must be considered when measuring the circuit's true "net" heating output.

A case study of a ThermaCEILing radiant system in a Connecticut home.

Single-stage non-modulating heat sources in zoned distribution systems often face short cycling, particularly with low thermal mass. When few zones are active, they struggle to dissipate generated heat quickly, causing temperature build-up and potential shutdown of the heat pump based on internal limits, with varied restart behavior depending on controls.

Last month, we reviewed the basics injection mixing. It’s a method for controlling water temperatures by regulating the flow of heated water “injected” into a circulating distribution system, while simultaneously removing an equal flow of cooler water from that distribution system. Any method that controls the rate of injection flow also controls the rate of heat transfer into the distribution system.