Boiler and Radiant Heating Guide

Boilers heat with water instead of air. You will find them in many older homes in our area, and radiant floor heat is a popular choice in new builds and basement remodels. This guide explains how both work, what tends to go wrong, and how to know if a boiler or radiant system suits your home.

How a hot-water boiler heats your home

A boiler heats water and a pump moves it through pipes to radiators, baseboard units or tubing in the floor. The warm water gives off heat, cools down and returns to the boiler to be heated again. It is a closed loop. The same water circulates all season.

The main parts are:

• The burner and heat exchanger, where gas heats the water.
• The circulator pump, which pushes water through the loop.
• The expansion tank, which gives heated water room to expand so pressure stays safe.
• The pressure relief valve, which opens if pressure gets too high.
• Zone valves or extra pumps, which let different parts of the house be heated separately.

Most homes with boilers in Northern Utah have hot-water systems. Steam boilers are rare here.

Why people like heating with water

Quiet, even heat

There is no blower and no rush of air through vents. Heat rises gently from radiators or the floor, and rooms feel steady instead of warm and cold in waves.

Less dust moving around

Because no air is forced through ducts, a boiler system does not blow dust from room to room. Many homeowners notice the house stays cleaner.

Zoning is built in

Boiler systems split easily into zones. You can keep bedrooms cooler and the main floor warmer, each with its own thermostat.

What is radiant floor heating?

Radiant floor heat runs warm water through flexible tubing under the floor. The floor itself becomes the heater. Warmth spreads up from your feet, which feels very comfortable on a cold winter morning.

Where radiant floors fit

Radiant heat works well in basements with concrete slabs, bathrooms with tile floors, kitchens, and new construction where the tubing can go in before the floor. It can also heat a garage or shop slab.

What to know before you choose it

Radiant floors respond slowly. They take time to warm up and cool down, so they suit steady settings more than big daily swings. They also do not provide cooling, so most homes pair them with a separate AC or a ductless system. Our radiant in-floor heating page covers planning and installation.

Common boiler problems

Boilers are durable, but older systems in established neighborhoods often show their age. These are the issues we see most.

Cold radiators or cold zones

Air trapped in the pipes can block water flow. Bleeding the radiators often fixes it. If a whole zone is cold, a zone valve or pump may have failed.

Pressure that is too high or too low

Your boiler has a gauge. If pressure creeps up and the relief valve drips, the expansion tank may be waterlogged. If pressure keeps dropping, there may be a leak somewhere in the loop.

Banging and gurgling

Kettling, a rumbling sound like a pot about to boil, often comes from mineral scale inside the heat exchanger. Our hard, mineral-rich water makes scale a real concern. Gurgling usually means trapped air.

Leaks around the boiler

Water on the floor near the boiler can come from the relief valve, a pump seal or a fitting. Do not ignore it, because a small drip can grow fast.

Our boiler repair service handles all of these. We also offer 24/7 emergency service when your heat goes out on a winter night.

Keeping a boiler running well

A yearly check before the heating season helps a boiler last. A good visit tests the burner and combustion, checks the expansion tank and relief valve, looks for leaks, tests the pumps and zone valves, and checks system pressure. Our boiler maintenance page explains the visit in detail, and our VIP Maintenance Plan adds a yearly 88-point inspection with priority scheduling.

Between visits, you can help:

• Glance at the pressure gauge now and then and note if it changes.
• Keep the area around the boiler clear of boxes and storage.
• Bleed radiators at the start of the season if they are cool at the top.
• Call if you see water, smell gas or hear new noises.

Planning a radiant floor project

Radiant heat is easiest to add when a floor is already being torn up or poured. If you are finishing a basement, remodeling a bathroom or building a garage, that is the moment to ask about it. Here are the questions we work through with you.

What will heat the water?

Radiant tubing needs a heat source. That can be a boiler that already heats your home, a new boiler sized for the floor, or in some small projects a dedicated water heater. The right choice depends on how much floor you want to heat and what equipment is already in the house.

What goes on top of the floor?

Tile and stone pass heat through well. Thick carpet and heavy pads slow it down. Wood can work, but it needs care with temperatures so it does not dry out and gap. Tell us your flooring plans early so the design fits them.

How will each area be controlled?

A bathroom, a basement family room and a garage often want different temperatures. Splitting the tubing into zones, each with its own thermostat, keeps everyone comfortable and keeps you from heating spaces nobody is using.

How is the slab insulated?

Heat goes where it is easiest to go. Without insulation under a concrete slab, much of the warmth moves down into the ground instead of up into the room. In new pours, insulation board under the tubing makes a big difference.

Boiler safety basics

Boilers are safe when they are maintained, but they are still gas appliances working under pressure. A few habits keep your family and your home protected.

• Keep a working carbon monoxide alarm near the bedrooms and another near the boiler room.
• Never cap, plug or tie off the pressure relief valve, even if it drips. A dripping valve is a sign to call for service.
• Keep paint, gas cans and cleaning supplies away from the boiler.
• If you smell gas, leave the house and call your gas utility from outside before calling us.

Repair or replace an old boiler?

Boilers often run a long time, so the question usually comes up on very old equipment. A cracked heat exchanger, constant leaks or repeat repairs are signs it may be time. Newer high-efficiency boilers are smaller, use less fuel and can often feed both your heating and your hot water. See our boiler installation page for the options. We offer free estimates on new system installations, and financing is available through our lending partners.

Talk to us about your boiler

Questions about a boiler or a radiant floor project? Call (435) 730-2536. Our office is open Monday to Friday, 8 AM to 6 PM, with 24/7 emergency service. You can also schedule online.