Combined heating in the house of aerated concrete (frost -40 heating tested)

I am glad to share his experience in the field of heating homes of aerated concrete. Preface: there is a house of 100 square meters, the wall thickness of 40 cm. Ceiling height 2.75 m, is planned on the ground floor. The combination of radiators and floor heating in this perfectly, as aluminum radiators to quickly warm up the air in the room is cold. A concrete screed smoothly gives the accumulated heat and is a kind of heat accumulator.

The choice of system accessories and materials

I samostroyschik and heating project was implemented in the form of a sketch by hand. In my system Zot boiler involved Poplar M14 kW, single-tube wiring copper pipe 22 mm (Drift diameter 20 mm), copper fittings, aluminum radiators rate of 1 to 1.5 square section m. If you do not have sexes, 1 radiator section - 1 meter of housing. Naturally, a lot of Americans, faucets, plumbing flax and anaerobic sealant. For floor heating device - 400 m Lavita tube of 16 mm diameter (drift diameter 12 m), extruded polystyrene and 5 cm 3. The collector found in parts of it will continue to tell apart, and of course with the photo. Circulating pumps and especially their selection will also be illuminated separately, in view of operational characteristics of copper.

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Soldering copper wiring single pipe connecting the radiator.

Before you start soldering radiators are hung on the walls. I did it under the windows, plus one was added to the corridor.

Now it is clear what the pipe length to be cut. I took Viega of annealed copper tube coils 25 m The main problem of such a pipe -. Unwinding. It needs an assistant and a table, with a focus bolted. We very carefully unbent pieces of 3 meters, and cut dopravlyali individually, thus achieved almost perfectly smooth results. Can be cut as a special cutter and sawing metal. It is important to accurately process the cut. Wrapped inside portion (burr) constricts the tube, reducing the ability of the checkpoint, and also leads to the gradual destruction of the joint due to the occurrence of flow turbulence. Soldering copper carried a gas burner, preferably professional, but if the arms straight, even a tourist can do all qualitatively.

The inner part of the fitting ruff treated specially. Outdoor - special hard sponge, it allows you to remove oxides that can ruin the connection later. I flux is only applied to the tube, when connected to the fitting until it stops replaying - flux is evenly distributed. Preheat burner is carried out before the flux changes color from gray to silver. At this time, the burner and the compound relates entered solder. Should not "drink" too much joint - the solder can get in that is not good for a passing ability to perfect the copper wall. A small drop at the bottom of soldered joints are almost always talking about the joint reliability. Annealed copper seemed to me more convenient, because it can always be a little dognut.

I have not used a different tube diameter - and the bypass, and the supply to the radiator filled with one diameter. There are no problems with the heating, looking ahead - the volume of water in the system went 147 liters, taking into account gender, everything is fine and quickly heated.

Features of operation of copper.

If you thought that the copper for the ages, it is not so simple. Firstly, the coolant flow rate should not exceed 1 m / s, otherwise the protective film on the inner surface of the pipe is washed away, will go slow destruction of the pipe. At the pump UniPump 25-40 me, he is the first speed is ideal to easily pushes circuit 40 m and uniformly heats all radiators. Provides uniform heating is not only solid fuel boiler, but the boiler 3 kW, when the coal haul once. Third, the connection of the copper-aluminum - only through the bronze / brass transition, otherwise the galvanic pair will give an active chemical reaction. It manifest itself in the destruction of the radiator due to corrosion and constant "gassing" system (hydrogen evolution). With regard to the coolant - I took advantage of the river water, because it is more neutral. In my region, central water supply has a problem with stiffness and fill the system with the crane, I did not dare. There was an option to fill in antifreeze, but I rule out because the house I live constantly, throwing the system do not need no heating.

Underfloor heating in the concrete screed.

Heated floor on the ground I implemented as the following "pie": waterproofing film on sand, Epps 5 + 3 cm, film, mesh, 10 cm cell.

It has already been fixed grid tube 16 mm, with specially procured additional tubes.

They were worn over the tubes in the places of contact with mesh to prevent friction and degradation during thermal spreader. Feedback from the network read that creaking pipes when heated. I do not know, never heard. Probably something wrong done for me, but I think if there is a creaking, just rub off prematurely. Before pouring the concrete pipe extruding required operating pressure plus 1-1.5 atmospheres. I 8 units of 60 meters long, the pump is the same as the radiator, UniPump 25-40, at the second speed presses bang, at the first bit worse. When assembling the pump-mixing group used collectors SMS (nouneym what that), the thermal head and the three-way valve Valtec.

Circuit assembly took somewhere in the network, everything works fine. But circuits 7 and could do as 80 m of 16 mm tube pump will pump without problems. The only difference - is the eyeliner from the collector to the boiler to the node floor heating.

We complied with stainless steel 25 mm, since the end of the copper installation was over in my city at the normal price. And to give a factor of 2 is no longer wanted.

According to the results, I can say: frosts -40 heating experienced when downloading a coal bucket at 23.00, in the morning at 7.00 19 and temperature on the floor and in the air, very comfortable, as the boiler at the time not I turn. On average, -30 outside, day out 3 coal, warm floor buckets, the owners are happy, happy cat!

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