Is the Grant VortexBlue 21kW a combi boiler, system boiler or regular boiler?

The Grant VortexBlue 21kW is an option you may wish to consider if you’re looking for a heat only boiler for your house or flat.

A heat only boiler, sometimes called a conventional boiler, a standard boiler or a regular boiler, requires both a hot water cylinder and a cold water tank to operate. Most homeowners keep their hot water cylinder in a landing cupboard or airing cupboard and their cold water tank in the attic. Your hot water is kept warm in the immersion cylinder.

With a heat only boiler, you program your hot water and temperature for set times during the day or week. If you forget to set your boiler or the immersion cylinder runs out of hot water, you may have to wait up to an hour for your supply of hot water to be restored.

A heat only boiler is likely to be the best choice for a home with several bathrooms or a bigger family - the type of household where hot water is in continual demand and more than one person might need it at once. With the more popular combi boiler, there is a maximum amount of water that can be heated and distributed, while pressure, volume and temperature drop if two or more people need hot water at once.

Is a Grant VortexBlue 21kW heat only boiler right for my house or apartment?

Whether this Grant VortexBlue 21kW heat only boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions - it means how powerful it is.

The output level of a boiler tells you how much power it has to heat the water coming from your taps and warming up your radiators. The higher the output level, the greater the volume of water it can heat up.

If the output (measured in kilowatts) is too high, you'll pay higher oil bills and your water will be piping hot. Too low and the water coming out of your taps and being fed into your radiators will often be lukewarm.

The Grant VortexBlue 21kW heat only outputs at a maximum of 21 kW, so which types of property would this Grant VortexBlue 21kW heat only boiler be appropriate for?

An experienced PlumbProud heating engineer would recommend that the most suitable type of property for a Grant VortexBlue 21kW heat only would be medium-sized homes and larger apartments containing 10-15 radiators and providing hot water for two bathrooms.

Dimensions of the Grant VortexBlue 21kW boiler

The Grant VortexBlue 21kW is 860 mm high by 470 mm wide by 603 mm deep.

If you use a floor-standing boiler like the Grant VortexBlue 21kW for your central heating and you're interested in replacing it with a more compact, wall-mounted boiler, you can. Wall-mounted boilers have been the most popular choice over the last two decades among homeowners wanting to create more space within their properties. Bear in mind that, while wall-mounted units are cheap, you may have to pay more for installation if your current piping needs replacing because it's not compatible with your new system.

This additional cost would however be recouped in full over a few years because of the savings you make on your quarterly oil bills.

Is the Grant VortexBlue 21kW condensing or non-condensing?

Because of their increased energy efficiency, we recommend to all customers that they select one of the latest condensing boilers. Condensing boilers capture the heat from water vapour condensation and flue exhaust gases and recycle that heat to warm water entering the boiler (for example, from your radiators).

The Grant VortexBlue 21kW is a condensing oil boiler and choosing this model will result in a likely substantial reduction in your fuel bills, particularly if you're replacing an older, inefficient, non-condensing boiler.

Is the Grant VortexBlue 21kW heat only considered environmentally friendly?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

About 14% of the greenhouse gases we produce in the UK come from the power needed for central heating. In bigger British cities, gas boilers are a significant source of nitrogen dioxide emissions.

If you decide to install a Grant VortexBlue 21kW heat only in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

Under current UK law, all boilers must achieve a minimum energy efficiency level of 92% (a low to good SEDBUK "A" rating). The minimum level was raised from its previous 88% in April 2018.

Energy efficiency scores are intended to inform consumers of the amount of energy used and wasted when a boiler is in normal operation.

The Grant VortexBlue 21kW was awarded an efficiency rating of 90.8% with a SEDBUK band rating of "A".

The ERP (Energy Related Products Directive) applies to all products that consume energy at any time in their lifetime, from manufacture to disposal and all points in between.

The intention of this European legislation is to encourage manufacturers to offer end users products that are better for the environment through the creation of fewer harmful gas emissions at all points of a product's life cycle.

The ERP rating for the Grant VortexBlue 21kW is "A".

Does the Grant VortexBlue 21kW heat only boiler come with a warranty?

The Grant VortexBlue 21kW boiler has a warranty covering parts and labour costs for up to 2 years after installation.