How to Install a Combination Boiler/Water Heater

How to Install a Combination Boiler/Water Heater | Ask This Old House

Рет қаралды 797,007

8 жыл бұрын

This Old House plumbing and heating expert Richard Trethewey replaces a water heater and boiler with a single unit that's much more efficient. (See below for a shopping list, tools, and steps.)
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Richard replaces an old water heater and heating boiler with a single unit that is much more efficient.
Shopping List for How to Install a Combination Boiler/Water Heater:
- Plywood panel, used for mounting new combination boiler[BR]
- Combination boiler/water heater, including mounting hardware
- PVC pipe and fittings
- Outdoor temperature sensor
- PVC condensate line with limestone neutralizer
- Condensate pump
Tools List for How to Install a Combination Boiler/Water Heater:
- Screwdriver
- Drill/driver with 4-inch hole saw
- Tape measure
Steps for How to Install a Combination Boiler/Water Heater:
1. Mount a plywood panel to the basement wall to serve as a mounting panel for the new combination boiler.
2. Run new gas, electrical, and plumbing lines to the plywood panel.
3. Screw the metal mounting brackets to the plywood panel, then hang the combination heater onto the brackets.
4. Drill two 4-inch-diameter holes through the house wall for the exhaust vent and air intake vent. Be sure the air intake is above the snow line, and that the exhaust vent is 12 inches from a window and 12 inches from the air intake.
5. Use PVC pipe and fittings to create the exhaust and air intake vents. Run the piping from the boiler through the exterior wall.
6. Connect hot- and cold-water lines to the combination boiler to deliver water to the heating system and the domestic water fixtures.
7. Connect the gas line and new electrical cable to the combination boiler.
8. Mount an outdoor temperature sensor onto the north side of the house to help regulate the production of hot water.
9. Run a PVC condensate line with limestone neutralizer from the combination heater to a nearby utility sink drain or floor drain. Use a condensate pump to drain away the excess condensation.
10. Turn on the combination boiler, and it should immediately start making hot water.
11. Remove and discard the old boiler and water heater.
Expert assistance with this project was provided by Barry Cullen of Comfort Technology [www.comfort-technology.com/].
Richard and Barry installed a condensing wall-mounted boiler, model number E75C, manufactured by Rinnai [www.rinnai.us/]
About Ask This Old House TV:
Homeowners have a virtual truckload of questions for us on smaller projects, and we're ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers-and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O'Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.
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How to Install a Combination Boiler/Water Heater | Ask This Old House
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Пікірлер: 547

@marcosmota1094 5 жыл бұрын

I know it's an old video, but it's nice to see Roger!

@PatrickvanderStoop 6 жыл бұрын

this one i love, because this heater is made in the Netherlands... so two things i love the most... America and the dutch heaters..... great show guys..

@Anakwad 5 жыл бұрын

Thanks for the information ! I love This old house.

@etem.a.4974 3 жыл бұрын

That basement is so neat ... Organized .... Wow...

@1chish 8 жыл бұрын

I first fitted a German made Vaillant combi boiler over 35 years ago here in the UK. It lasted longer than my marriage at 20+ years! I have fitted a few other makes for friends. Ideal, Baxi, Worcester (Bosch). All have lasted with annual servicing to keep them 100%. Last one I fitted was an Ideal Logic 30, cost me about £750 ($1060) and I fitted it in 2 days replacing a 30 year old floor mounted Mexico. Have to say the UK flue and intake systems seem to be far better than that US version. You hardly notice them as they combine the two into one pipe. Different Regs I suppose.

@jacob60617 3 жыл бұрын

I had one install on my home. It’s really good. But can be expensive to maintenance if it breaks down

@TheOneWaja 6 жыл бұрын

Im from the UK. i have a Vailant turbomax 242, over 10 years old in my home. im a gas engineer and have barely had to touch my boiler other then to service it. Get your boiler serviced yearly, properly and it should last many years like mine. many new combis are made to break. however there are a few good new boiler makes out there which will last years. for example, the new Baxi range. Make sure your boiler has rigid materials such as copper and brass and my word, what a range of boilers they have. very innovative. i recommend all to have a look. easy to maintain and repair, what can go wrong!

@paulg444 5 жыл бұрын

I like the old cast iron system.

@omaxman1 7 жыл бұрын

can't stop watching these videos..

@reubenyoder6990 6 жыл бұрын

Use a Navien combi boiler and you can vent it with 2 inch pipe.

@CastleBomb44 3 жыл бұрын

Ok I am convinced. I really want my first house to have a Gas Combination Boiler/Water Heater

@edyflorida6344 6 жыл бұрын

i m so happy follow ask this old house on youtube

@GalaXy808 8 жыл бұрын

wow? I got it,sounds like better than the regular water heater

@Lionscall111 Жыл бұрын

I loved how they picked up the unit by its internal and valuable sensitive parts to hang on the wall.

@tre2472 7 жыл бұрын

would you recommend the water in this system be treated? like a water softener?

@SureShotImages 5 жыл бұрын

Clean install boys!

@Ringele5574 4 жыл бұрын

Thanks TOH for posting some of your programming. I really enjoy them. Please don't listen to all of these 15 y/o experts in the comments.

@larrycurrier290 3 жыл бұрын

I'd like to see a video of years later and see just how happy this lady is with this thing. Don't ask somebody that's just put one of these in how they like it asked somebody that's had one for a while. This thing is very low water capacity I can imagine this thing having some amount of thermal shock when it sucks that nice cold water back from the system.

@victorguery1492 4 жыл бұрын

Do I need an external pump for the heat loop? Of is the internal pump strong enough for 3 zones?

@verbotn 3 жыл бұрын

When I install condensing gas appliances, I will put the air intake and exhaust as far apart as possible. It made me cringe to see them putting the two side by side as that increases the chance of the air intake being subject to frost closure during extremely cold weather, when some of the moist exhaust is re-ingested and creates a hoar frost accumulation in the air intake. When the air intake is partly or entirely blocked by frost or any foreign material, a sensitive air-pressure safety switch will prevent the appliance from firing. The region they're installing in might make this less likely, but I'm in Calgary, Alberta so we do get some very cold spells during winter where this is a factor. If I am installing multiple condensing gas-fired appliances, I will bank all of the intakes together and all of the exhausts together with as much space between them as site conditions allow, though generally 6' is plenty. There is usually a prevailing wind direction, so I'll install the intakes upwind of the exhausts for the same reason.