Q. The hot-water heating system in our house is very noisy, especially at night when we are trying to sleep.

There are radiators along outside walls as a part of the central, hot-water heating system.

If you have a hot-water heating system, the boiler might be drawing water occasionally.

In the following weeks, the focus will be on hot-water heating, then steam heating.

Radiant floor heating is another type of hot-water heating system.

Hot-water heating provides radiant heat, which many people find more comfortable than forced-hot air.

Q. I own a two-family house that has baseboard hot-water heating.

For buildings with hot-water heating systems, it is possible to make adjustments by using an "outdoor reset control."

Although there is an oil-fired hot-water heating system, the couple prefer to use the wood-burning stove.

The annual maintenance routine for a hot-water heating system should start with a furnace tune-up by a professional service technician.

The program to repair or replace 20 miles of defective water, electric and hot-water heating lines started two years ago and has far to go.

We have a three-zone circulating hot-water heating system and two of the three circulators have served us well for almost 30 years.

Q.We have baseboard hot-water heating and draperies that hang to the tops of the baseboard panels.

In 1971, new forced air heating systems were retrofitted into the original classrooms which were served by the defunct hot-water heating systems.

The last of the four reactors had been working at low output for months only because it also provided hot-water heating for 45,000 people and scores of factories.

The oak pews and present pulpit were installed at the turn of this century and hot-water heating was installed in 1899 it a cost of £75.

Steam and Hot-Water Heating Plants Inspection and Preventive Maintenance Service.

Engineers in the United Kingdom and in other parts of Europe commonly combine the needs of room heating with hot-water heating and storage.

With a 2.5 L six-cylinder engine, all-steel body, front independent suspension, hydraulic shock absorbers, hot-water heating (with electric blower), and central speedometer.

Originally, the campus had a central hot-water heating system, which was impractical because of the many disjunct buildings, mostly with four classrooms apiece, served by covered, outdoor hallways.

Q.Our circulating hot-water heating system works well, but when it goes on we hear ticking and clicking noises that are probably due to the copper pipe stretching as it heats.

With an adequately sized system in place, Mr. Thulin said, a geothermal heat pump installed in the house can provide enough heat to run a radiant hot-water heating system or a forced-air heating system.

Mr. Gifford said that with most conventional hot-water heating systems, the water is heated to a preset temperature - generally around 180 degrees Fahrenheit - and then circulates that heated water to radiators throughout the house.

Solar hot-water heating systems - used by President Carter at the White House and several hundred homeowners in Connecticut - use pipes filled with solutions similar to anti-freeze; they run from the roof to a tank where, like coils, they warm the water.

Other environmentally friendly features of the Wisconsin Institutes for Discovery include a geothermal well system, solar hot-water heating, gray water use for irrigation and the use of high efficiency lighting, water flow fixtures and HVAC systems throughout.